150 Popular Dietary Supplements

Acai is often marketed as a superfood due to its high antioxidant content. Advocates claim that it can improve heart health, aid weight loss, and improve skin appearance. However, more research is needed to support these claims.

Activated charcoal is claimed to detoxify the body, aid digestion, and whiten teeth. However, there is limited scientific evidence to support these claims, and it may also interfere with the absorption of certain medications.

Alfalfa is promoted as a natural remedy for a variety of health issues, including high cholesterol, menopause symptoms, and arthritis. While it does contain some vitamins and minerals, more research is needed to determine its effectiveness.

Aloe vera is commonly used in topical products for its moisturizing and soothing properties. It is also claimed to have benefits when consumed orally, such as aiding digestion and boosting the immune system. However, more research is needed to confirm these effects.

Alpha-lipoic acid is an antioxidant that is claimed to have a variety of health benefits, such as reducing inflammation, improving insulin sensitivity, and slowing the aging process. However, more research is needed to support these claims.

American ginseng is often used to boost energy, improve cognitive function, and support the immune system. While some studies suggest it may have these effects, more research is needed to confirm its effectiveness.

Apple cider vinegar is claimed to aid weight loss, improve digestion, and lower blood sugar levels. While some studies suggest it may have these effects, more research is needed to confirm its effectiveness and determine safe dosages.

Arnica is often used topically for pain relief and to reduce inflammation. However, there is limited scientific evidence to support these claims, and it may cause allergic reactions in some people.

Ashwagandha is an adaptogen that is claimed to reduce stress, improve cognitive function, and boost energy levels. While some studies suggest it may have these effects, more research is needed to confirm its effectiveness and determine safe dosages.

Asian ginseng is used to boost energy, improve cognitive function, and support the immune system. While some studies suggest it may have these effects, more research is needed to confirm its effectiveness and determine safe dosages.

Astragalus is often used in traditional Chinese medicine to boost the immune system and improve overall health. While some studies suggest it may have these effects, more research is needed to confirm its effectiveness and determine safe dosages.

Bacillus coagulans is a probiotic supplement that claims to improve digestion and strengthen the immune system. It may also help reduce inflammation, lower cholesterol levels, and alleviate symptoms of irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD). However, further research is needed to fully understand the potential benefits and risks of taking Bacillus coagulans as a dietary supplement.

Bee pollen is a popular health supplement that is claimed to provide numerous health benefits, such as boosting energy levels, reducing inflammation, and improving overall immunity. It is also believed to help with weight loss and support heart health. However, some individuals may experience allergic reactions to bee pollen and more research is needed to confirm the benefits of this supplement.

Belladonna is a poisonous plant that is sometimes used in homeopathic remedies. It is claimed to help with various conditions such as muscle spasms, irritable bowel syndrome (IBS), menstrual cramps, and motion sickness. However, the use of belladonna is highly controversial due to its potential toxicity and side effects, and it is not recommended for use without the supervision of a qualified healthcare provider.

Berberine is a natural compound found in various plants that is claimed to have a wide range of health benefits, including reducing cholesterol levels, regulating blood sugar levels, and improving cardiovascular health. It may also have antimicrobial and anti-inflammatory properties. However, more research is needed to fully understand the potential benefits and risks of taking berberine as a supplement.

Beta-carotene is a type of carotenoid that is found in various fruits and vegetables, such as carrots and sweet potatoes. It is claimed to have antioxidant properties that can help protect against various chronic diseases, including cancer, cardiovascular disease, and age-related macular degeneration (AMD). However, high doses of beta-carotene supplements may increase the risk of lung cancer in smokers and further research is needed to understand its potential benefits and risks.

Bifidobacterium animalis subsp. lactis is a probiotic supplement that is claimed to improve gut health and strengthen the immune system. It may also help alleviate symptoms of irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD). However, more research is needed to fully understand the potential benefits and risks of taking Bifidobacterium animalis subsp. lactis as a supplement.

Bilberry is a type of berry that is claimed to have antioxidant and anti-inflammatory properties. It is often used to improve vision and eye health, as well as to support cardiovascular health and reduce inflammation. However, more research is needed to fully understand the potential benefits and risks of taking bilberry as a supplement.

Biotin, also known as vitamin H, is a water-soluble B vitamin that is claimed to improve hair, skin, and nail health. It is also believed to support healthy metabolism and regulate blood sugar levels. However, there is limited scientific evidence to support these claims and further research is needed to understand the potential benefits and risks of taking biotin as a supplement.

Bitter melon is a vegetable that is claimed to have numerous health benefits, including regulating blood sugar levels, improving digestion, and supporting heart health. It may also have antimicrobial and anti-inflammatory properties. However, more research is needed to fully understand the potential benefits and risks of taking bitter melon as a supplement.

Bitter orange is a citrus fruit that is claimed to have various health benefits, particularly for weight loss and athletic performance. However, some studies suggest that it may have adverse effects on the heart and may interact with certain medications. More research is needed to fully understand its effects and potential risks.

Black cohosh is a plant that is claimed to have various health benefits, particularly for relieving menopause symptoms such as hot flashes and vaginal dryness. It may also have anti-inflammatory and antioxidant properties. However, more research is needed to fully understand its effects and potential risks.

Black psyllium is a type of soluble fiber that is claimed to have various health benefits, particularly for digestive health. It may help relieve constipation, diarrhea, and other digestive issues. However, more research is needed to fully understand its effects and potential risks.

Black seed is the seed of the Nigella sativa plant and is claimed to have various health benefits, including improving digestive health, reducing inflammation, and boosting the immune system. It may also have anticancer properties. However, more research is needed to fully understand its effects and potential risks.

Black tea is a type of tea that is claimed to have various health benefits, particularly for heart health and reducing the risk of certain chronic diseases. It is rich in antioxidants and may help lower cholesterol levels and improve blood sugar control. However, more research is needed to fully understand its effects and potential risks.

Blessed thistle is a plant with a long history of use in traditional medicine. It is commonly used to stimulate appetite, support digestion, and relieve gas and bloating. Some studies suggest that blessed thistle may have anti-inflammatory and antioxidant effects, and may help to lower blood sugar levels. However, more research is needed to confirm these potential health benefits and to determine the safety of long-term use.

Blond psyllium is a type of soluble fiber that is commonly used to relieve constipation and promote regular bowel movements. It may also help to lower cholesterol levels and improve blood sugar control in people with diabetes. Some studies suggest that blond psyllium may have anti-inflammatory effects and may help to protect against certain types of cancer. However, more research is needed to confirm these potential health benefits and to determine the safety of long-term use.

Blue-green algae, also known as cyanobacteria, are a type of aquatic bacteria that are commonly used as a dietary supplement. They are rich in nutrients like protein, vitamins, and minerals, and may help to support immune function, improve digestion, and reduce inflammation. Some studies suggest that blue-green algae may have anti-cancer effects and may help to protect against certain types of cardiovascular disease. However, more research is needed to confirm these potential health benefits and to determine the safety of consuming blue-green algae supplements over time.

Blueberries are a type of fruit that are rich in antioxidants, which help to protect the body against damage from harmful molecules called free radicals. Some studies suggest that blueberries may help to improve brain function, lower blood pressure, and reduce the risk of heart disease. They may also have anti-inflammatory effects and help to protect against certain types of cancer. However, more research is needed to confirm these potential health benefits and to determine the safety of consuming large amounts of blueberries over time.

Boron is a mineral that is essential for bone health and brain function. It may also help to reduce inflammation and protect against certain types of cancer. Some studies suggest that boron may help to improve bone density, reduce the risk of osteoporosis, and improve cognitive function in older adults. However, more research is needed to confirm these potential health benefits and to determine the safety of consuming large amounts of boron over time.

Butterbur is a plant that is commonly used to treat migraines, hay fever, and other respiratory allergies. It may also help to relieve inflammation and pain, and has been used in traditional medicine for hundreds of years. Some studies suggest that butterbur may be effective in reducing the frequency and severity of migraines, and may help to relieve symptoms of hay fever. However, more research is needed to confirm these potential health benefits and to determine the safety of long-term use of butterbur supplements.

Calcium is an essential mineral that is important for the proper functioning of the body. It is necessary for the development and maintenance of strong bones and teeth, and it also plays a role in muscle function, nerve transmission, and blood clotting. Calcium supplements may be recommended for individuals who do not get enough calcium from their diet, or who have conditions that affect the absorption of calcium, such as osteoporosis. However, excessive intake of calcium supplements can lead to side effects such as constipation, bloating, and kidney stones.

Calendula is a plant that has been used for medicinal purposes for centuries. It is believed to have anti-inflammatory and antiseptic properties, and may be used topically to treat skin conditions such as eczema, acne, and wounds. Calendula may also be taken internally to help with digestive issues and to boost the immune system. However, more research is needed to fully understand the potential health benefits and risks associated with the use of calendula supplements.

Cancell/Cantron/Protocel is a controversial alternative cancer treatment that is not supported by scientific evidence. The treatment involves a combination of various chemicals and herbs, and is marketed as a way to cure cancer without surgery, chemotherapy, or radiation. However, there is no credible evidence to support the efficacy of this treatment, and it may be harmful to those who use it instead of seeking evidence-based cancer treatments. The FDA has warned against the use of Cancell/Cantron/Protocel, and it is not recommended for the treatment of cancer.

Cannabidiol (CBD) is a compound found in the cannabis plant that has been studied for its potential therapeutic effects. It is believed to have anti-inflammatory, analgesic, and anti-anxiety properties, and may be used to treat conditions such as chronic pain, anxiety, and epilepsy. CBD supplements are available in a variety of forms, including oils, capsules, and topical creams. However, the legal status of CBD supplements varies depending on the country or state in which they are sold, and more research is needed to fully understand the potential benefits and risks associated with their use.

Capsicum is a plant that produces chili peppers, which are used as a spice in many cuisines around the world. Capsicum supplements may be taken for their potential health benefits, which include improved digestion, pain relief, and increased metabolism. Capsicum supplements may also be used topically to treat pain and inflammation. However, excessive intake of capsicum supplements can lead to side effects such as heartburn, stomach pain, and skin irritation.

Cartilage supplements made from bovine and shark cartilage are marketed as a way to improve joint health and reduce inflammation. Bovine cartilage supplements are believed to have anti-inflammatory properties, and may be used to treat conditions such as osteoarthritis. Shark cartilage supplements are believed to contain compounds that may inhibit the growth of cancer cells. However, more research is needed to fully understand the potential health benefits and risks associated with the use of cartilage supplements.

Cascara Sagrada is a natural laxative that is derived from the bark of the Cascara Sagrada tree. It is used to treat constipation and to promote bowel regularity. Cascara Sagrada supplements may also be used to detoxify the body and to improve liver function. However, excessive use of Cascara Sagrada supplements can lead to side effects such as abdominal cramps, dehydration, and electrolyte imbalances.

Cat's claw is a herb that has been used for centuries in traditional medicine for its potential anti-inflammatory and antioxidant properties. It is claimed to support immune system function, aid in the treatment of viral infections and boost the body's natural defense against disease. However, more research is needed to confirm these benefits and to determine the optimal dose and potential side effects of using cat's claw as a supplement.

Chamomile is a herb that has been used for centuries as a natural remedy for various ailments, including anxiety, insomnia, and digestive issues. It is claimed to have a calming effect on the body, promote relaxation and sleep, and reduce inflammation. While studies have shown some promising results, further research is needed to fully understand the potential health benefits and risks associated with the use of chamomile supplements.

Chasteberry, also known as vitex, is a herb commonly used to regulate hormone levels and improve menstrual symptoms. It is claimed to have potential benefits for reducing premenstrual syndrome (PMS), reducing breast tenderness, and promoting lactation. While research is ongoing, some studies suggest that chasteberry may have potential benefits for women's health, particularly in the regulation of menstrual cycles.

Chondroitin sulfate is a naturally occurring molecule found in cartilage that is commonly used in joint supplements to aid in the treatment of arthritis and joint pain. It is claimed to reduce inflammation, support joint health, and potentially slow the progression of osteoarthritis. While research is ongoing, studies have shown promising results for chondroitin sulfate in reducing joint pain and improving mobility.

Chromium is a mineral that is essential for the metabolism of carbohydrates and fats in the body. It is claimed to have potential benefits for improving blood sugar control, reducing inflammation, and promoting weight loss. While studies have shown some promising results, more research is needed to fully understand the potential health benefits and risks associated with the use of chromium supplements.

Cinnamon is a spice that is commonly used in cooking and is also available as a supplement. It is claimed to have potential benefits for reducing blood sugar levels, improving insulin sensitivity, and reducing inflammation. While studies have shown some promising results, more research is needed to fully understand the potential health benefits and risks associated with the use of cinnamon supplements.

Clove is an aromatic spice commonly used in cooking and also in traditional medicine. It is claimed to have anti-inflammatory and analgesic properties, and has been used to relieve toothaches and as a natural remedy for coughs and colds. However, high doses can be toxic and can cause adverse effects such as liver and kidney damage.

Coconut oil is a popular health food and natural remedy claimed to have many health benefits, such as improving cholesterol levels, boosting metabolism, and aiding weight loss. It is also used in skincare and haircare products due to its moisturizing and nourishing properties. However, there is limited scientific evidence to support these claims, and consuming large amounts of coconut oil can increase the risk of heart disease due to its high saturated fat content.

Coconut water is a popular beverage claimed to have numerous health benefits, such as hydrating the body, aiding digestion, and improving kidney function. It is also promoted as a natural sports drink due to its high electrolyte content. While coconut water is a good source of nutrients and can be a healthy alternative to sugary drinks, some of the health claims may be exaggerated and more research is needed to fully understand its effects.

Cod liver oil is a nutritional supplement claimed to have many health benefits, such as improving heart health, reducing inflammation, and boosting immune function. It is also a rich source of vitamins A and D, which are important for bone health and immune function. However, consuming high amounts of cod liver oil can be toxic and may cause adverse effects such as nausea, vomiting, and diarrhea. It is important to follow recommended dosages and consult with a healthcare provider before taking any new supplement.

Coenzyme Q10, also known as CoQ10, is a compound that plays a key role in energy production and is claimed to have many health benefits, such as improving heart health, reducing inflammation, and boosting cognitive function. It is also used as a supplement to treat various conditions such as migraine headaches and Parkinson's disease. While some studies have shown promising results, more research is needed to fully understand its effects and potential risks. CoQ10 supplements can interact with certain medications and may cause side effects such as nausea, diarrhea, and skin rashes.

Collagen peptides are a popular supplement claimed to have many health benefits, such as improving skin health, reducing joint pain, and promoting weight loss. Collagen is a protein found in the body that is important for maintaining healthy skin, hair, and nails. While some studies have shown that collagen supplements can improve skin elasticity and reduce wrinkles, there is limited scientific evidence to support other health claims. Collagen supplements are generally safe to use, but may cause side effects such as digestive upset and allergic reactions in some people.

Colloidal silver is a liquid supplement claimed to have antimicrobial and immune-boosting properties, and is sometimes used as a natural remedy for various infections and illnesses. However, there is limited scientific evidence to support these claims, and consuming colloidal silver can be dangerous and can cause a condition called argyria, which turns the skin blue-gray. Colloidal silver supplements are not recommended for use.

Cranberry is claimed to prevent urinary tract infections, and also to have anti-inflammatory and antioxidant effects. It may interact with certain medications and should be used with caution in individuals with a history of kidney stones or other renal diseases.

Creatine is marketed as a supplement for improving athletic performance and increasing muscle mass. It may also have neuroprotective and cognitive-enhancing effects. However, its long-term safety has not been extensively studied, and it may cause gastrointestinal distress and other side effects. It should not be used by individuals with kidney disease.

DHEA is marketed as a supplement for improving athletic performance, enhancing sexual function, and treating age-related conditions such as osteoporosis and depression. However, scientific evidence to support these claims is limited, and its long-term safety has not been extensively studied. It may also interact with certain medications and should not be used by individuals with hormone-sensitive conditions.

Dandelion is claimed to have diuretic and liver-detoxifying effects, and to reduce inflammation and blood sugar levels. It may interact with certain medications and should be used with caution in individuals with bile duct obstruction or gallbladder disease.

Deer velvet is marketed as a supplement for improving athletic performance, enhancing sexual function, and supporting joint health. However, scientific evidence to support these claims is limited. It may also cause allergic reactions and interact with certain medications.

Devil's claw is claimed to have anti-inflammatory and pain-relieving effects, and to improve digestion and appetite. However, scientific evidence to support these claims is limited. It may also interact with certain medications and should not be used by individuals with gastric or duodenal ulcers.

Dong Quai is a herb that is primarily used for women's health. It has been traditionally used to treat menstrual cramps, regulate menstrual cycles, and improve menopause symptoms. Some people also use it for osteoporosis, high blood pressure, and rheumatoid arthritis. However, there is insufficient evidence to support the use of dong quai for these conditions. It may also have some risks, including increased sensitivity to sunlight, increased risk of bleeding, and possible effects on hormone-sensitive conditions.

Echinacea is a popular herbal supplement that is commonly used to prevent and treat the common cold, flu, and other respiratory infections. It is believed to boost the immune system and reduce inflammation. Some studies suggest that echinacea may reduce the duration and severity of cold and flu symptoms, but the evidence is mixed. It may also cause some side effects, including stomach upset, rash, and allergic reactions. People with autoimmune disorders, allergies, or asthma should use echinacea with caution.

Elderberry is a fruit that has been used for centuries to treat colds, flu, and other respiratory infections. It is believed to boost the immune system and reduce inflammation. Some studies suggest that elderberry may reduce the duration and severity of cold and flu symptoms, but more research is needed. It may also have some side effects, including nausea, vomiting, and diarrhea. People with autoimmune disorders, allergies, or asthma should use elderberry with caution.

Eleuthero is a herb that is commonly used to improve mental and physical performance. It is believed to boost the immune system, reduce inflammation, and improve blood sugar levels. Some studies suggest that eleuthero may improve mental and physical performance, reduce fatigue, and improve quality of life in people with chronic fatigue syndrome. It may also have some side effects, including insomnia, agitation, and high blood pressure. People with hormone-sensitive conditions should use eleuthero with caution.

Ephedra is a herb that has been used for centuries to treat asthma, colds, flu, and other respiratory infections. It is also commonly used as a weight-loss supplement and a performance enhancer. However, it has been banned in the United States due to its serious side effects, including heart attack, stroke, and death. People should avoid using ephedra and seek medical attention immediately if they experience any symptoms of a heart attack or stroke.

Essiac and Flor Essence are herbal tea mixtures that are promoted as alternative cancer treatments. They contain a mixture of herbs, including burdock root, sheep sorrel, slippery elm bark, and Indian rhubarb root. However, there is no scientific evidence to support the use of Essiac or Flor Essence for cancer or any other medical condition. In addition, they may cause some side effects, including diarrhea, nausea, and vomiting.

Eucalyptus is commonly used in traditional medicine for respiratory problems, including asthma and bronchitis. It is believed to have anti-inflammatory, antioxidant, and antibacterial properties. Some preliminary research suggests that eucalyptus may have potential for treating certain conditions, such as sinusitis and cold sores. However, further research is needed to confirm these benefits and to determine safe and effective dosages. Eucalyptus oil should be used with caution, as it can be toxic if ingested in large amounts or if applied to the skin in undiluted form.

European mistletoe is a plant that is commonly used in traditional medicine for a variety of purposes, including to stimulate the immune system, treat cancer, and relieve arthritis pain. Although some studies have suggested that mistletoe may have anti-cancer effects and may be useful for treating other conditions, the evidence is not yet strong enough to recommend its use as a treatment. Additionally, mistletoe can be toxic if consumed in large quantities, and it should only be used under the supervision of a qualified healthcare provider.

Evening primrose oil is extracted from the seeds of the evening primrose plant, and it is commonly used as a dietary supplement for a variety of purposes, including to reduce inflammation, relieve premenstrual symptoms, and improve skin health. Although some studies have suggested that evening primrose oil may be beneficial for certain conditions, such as eczema and rheumatoid arthritis, the evidence is not yet strong enough to recommend its use as a treatment. Additionally, evening primrose oil can interact with certain medications, and it should only be used under the supervision of a qualified healthcare provider.

Fenugreek is an herb that is commonly used in traditional medicine to stimulate the appetite, promote lactation, and relieve digestive problems. It is also used as a dietary supplement for a variety of purposes, including to reduce inflammation, lower cholesterol levels, and improve exercise performance. Although some studies have suggested that fenugreek may have potential health benefits, the evidence is not yet strong enough to recommend its use as a treatment. Additionally, fenugreek can interact with certain medications, and it should only be used under the supervision of a qualified healthcare provider.

Feverfew is an herb that is commonly used in traditional medicine to relieve headaches, reduce inflammation, and prevent migraines. Although some studies have suggested that feverfew may be effective for treating migraines and other conditions, the evidence is not yet strong enough to recommend its use as a treatment. Additionally, feverfew can interact with certain medications, and it should only be used under the supervision of a qualified healthcare provider.

Flaxseed and flaxseed oil are commonly used as dietary supplements for a variety of purposes, including to reduce inflammation, lower cholesterol levels, and improve digestive health. Flaxseed is also used as a source of fiber and omega-3 fatty acids. Although some studies have suggested that flaxseed may have potential health benefits, the evidence is not yet strong enough to recommend its use as a treatment. Additionally, flaxseed can interact with certain medications, and it should only be used under the supervision of a qualified healthcare provider.

Folic acid is a B-vitamin that is essential for DNA synthesis, cell growth, and repair. It has been shown to reduce the risk of birth defects when taken by pregnant women and may also help to prevent certain types of cancer. However, taking high doses of folic acid supplements can mask symptoms of vitamin B12 deficiency and may increase the risk of certain cancers. It is important to talk to a healthcare provider before taking folic acid supplements.

Fucus vesiculosus, commonly known as bladderwrack, is a type of seaweed that is sometimes used for medicinal purposes. It is rich in iodine, which is important for thyroid function, and may also have anti-inflammatory and antioxidant properties. However, it can also contain high levels of heavy metals and may interact with certain medications. More research is needed to fully understand the potential benefits and risks of using fucus vesiculosus as a dietary supplement.

Garlic has long been used for its potential health benefits, including its ability to lower blood pressure and cholesterol levels, and its anti-inflammatory and antioxidant effects. However, taking garlic supplements can also have side effects such as stomach upset, bad breath, and increased bleeding risk. It may also interact with certain medications, so it is important to talk to a healthcare provider before taking garlic supplements.

Gelatin is a protein derived from collagen that is commonly used in food products and some dietary supplements. It is sometimes used to promote joint health and reduce joint pain, although the evidence supporting these claims is limited. Gelatin may also have other health benefits, such as improving skin health and aiding in digestion. However, it may not be suitable for vegetarians and can cause allergic reactions in some people. It is important to talk to a healthcare provider before taking gelatin supplements.

Ginger is a popular spice that is sometimes used for medicinal purposes. It has anti-inflammatory and antioxidant properties and may be effective in reducing nausea and vomiting caused by chemotherapy or motion sickness. However, taking ginger supplements can also have side effects such as stomach upset, heartburn, and increased bleeding risk. It may also interact with certain medications, so it is important to talk to a healthcare provider before taking ginger supplements.

Ginkgo biloba is a plant extract that is sometimes used for its potential health benefits, including its ability to improve memory and cognitive function in older adults. However, the evidence supporting these claims is mixed and more research is needed to fully understand the potential benefits and risks of taking ginkgo supplements. It may also interact with certain medications, so it is important to talk to a healthcare provider before taking ginkgo supplements.

Glucosamine is a dietary supplement commonly used to promote joint health and reduce joint pain. It is a building block of cartilage and may also have anti-inflammatory effects. However, the evidence supporting these claims is mixed and more research is needed to fully understand the potential benefits and risks of taking glucosamine supplements. It may also interact with certain medications, so it is important to talk to a healthcare provider before taking glucosamine supplements.

"Goji berries are marketed as a superfood that can boost immune function

"Goldenseal is a plant used in traditional medicine to treat infections

"Grapes and grape products such as juice and wine are marketed as rich sources of antioxidants and beneficial nutrients that can protect against cardiovascular disease

"Grape seed extract is a dietary supplement that contains antioxidants and other compounds that may have anti-inflammatory

"Grapefruit and grapefruit juice are marketed as weight loss aids

"Green coffee beans are marketed as a weight loss aid due to their high content of chlorogenic acid

Green tea is a popular dietary supplement claimed to provide a wide range of benefits. It is rich in antioxidants called catechins, which are believed to reduce the risk of chronic diseases such as heart disease, diabetes, and cancer. Green tea may also aid in weight loss by boosting metabolism and reducing appetite. However, excessive consumption of green tea can cause liver damage and other adverse effects. It may also interact with certain medications, such as blood thinners and beta-blockers.

Guarana is a dietary supplement made from the seeds of the guarana plant. It is commonly used as a natural stimulant due to its high caffeine content, which can provide a temporary energy boost. Guarana may also aid in weight loss and improve cognitive function. However, excessive consumption of guarana can cause side effects such as insomnia, anxiety, and high blood pressure. It may also interact with certain medications, such as blood thinners and antidepressants.

Gymnema is a dietary supplement made from the leaves of the Gymnema sylvestre plant. It is commonly used to treat diabetes and other blood sugar disorders due to its ability to reduce sugar cravings and lower blood glucose levels. Gymnema may also aid in weight loss and improve cholesterol levels. However, more research is needed to determine its effectiveness and safety. It may also interact with certain medications, such as insulin and diabetes medications.

Hawthorn is a dietary supplement made from the berries, leaves, and flowers of the hawthorn plant. It is commonly used to treat heart failure, high blood pressure, and angina due to its ability to improve blood flow and strengthen the heart. Hawthorn may also have antioxidant and anti-inflammatory properties. However, it may interact with certain medications, such as blood thinners and heart medications.

Hibiscus sabdariffa is a dietary supplement made from the dried flowers of the hibiscus plant. It is commonly used to lower blood pressure, improve cholesterol levels, and aid in weight loss. Hibiscus sabdariffa may also have antioxidant and anti-inflammatory properties. However, more research is needed to determine its effectiveness and safety. It may also interact with certain medications, such as blood thinners and diuretics.

Honey is a natural sweetener made by bees from the nectar of flowers. It is commonly used as a dietary supplement due to its antioxidant and antibacterial properties. Honey may also aid in wound healing and soothe coughs and sore throats. However, it is high in sugar and calories and should be consumed in moderation. Raw honey may also contain harmful bacteria and should not be given to infants under one year old.

Hoodia is a dietary supplement made from the Hoodia gordonii plant. It is commonly used as a natural appetite suppressant due to its ability to reduce hunger and food cravings. Hoodia may also aid in weight loss and improve overall health. However, more research is needed to determine its effectiveness and safety. It may also interact with certain medications, such as diabetes medications and antidepressants.

Hops are a plant commonly used for brewing beer. They have also been used for medicinal purposes, particularly for their calming effects. Hops have been used to treat anxiety, restlessness, and insomnia. They contain compounds that act as sedatives, helping to relax the body and promote sleep. Hops may also have anti-inflammatory and antibacterial properties. However, they can have side effects, such as dizziness, headache, and stomach upset. They may also interact with certain medications, so it's important to talk to a healthcare provider before using hops as a supplement.

Horny goat weed is an herb that has been used in traditional Chinese medicine for centuries. It is used to treat a variety of conditions, including low libido, erectile dysfunction, and osteoporosis. Horny goat weed contains a compound called icariin, which is thought to be responsible for its medicinal properties. It may help to increase blood flow and improve sexual function. However, there is limited scientific evidence to support these claims. Horny goat weed may also have side effects, such as nausea, vomiting, and dizziness. It may interact with certain medications, so it's important to talk to a healthcare provider before using horny goat weed as a supplement.

Horse chestnut is a tree native to Europe and Asia. Its seeds and leaves have been used for medicinal purposes, particularly for their ability to improve circulation and treat varicose veins. Horse chestnut contains a compound called aescin, which may help to reduce inflammation and improve blood flow. It may also have antioxidant properties. However, there is limited scientific evidence to support these claims. Horse chestnut can have side effects, such as nausea, vomiting, and dizziness. It may interact with certain medications, so it's important to talk to a healthcare provider before using horse chestnut as a supplement.

Horsetail is a plant that has been used for medicinal purposes for centuries. It is used to treat a variety of conditions, including urinary tract infections, kidney stones, and osteoporosis. Horsetail contains a compound called silica, which is thought to be responsible for its medicinal properties. It may help to improve bone density and promote healthy hair, skin, and nails. However, there is limited scientific evidence to support these claims. Horsetail can have side effects, such as nausea, vomiting, and dizziness. It may interact with certain medications, so it's important to talk to a healthcare provider before using horsetail as a supplement.

Hydrazine sulfate is a chemical compound that has been used as a cancer treatment. It is thought to work by interfering with the metabolism of cancer cells. Hydrazine sulfate may also have other medicinal properties, such as improving appetite and reducing fatigue. However, there is limited scientific evidence to support these claims. Hydrazine sulfate can have side effects, such as nausea, vomiting, and liver damage. It may interact with certain medications, so it's important to talk to a healthcare provider before using hydrazine sulfate as a supplement.

Iodine is a mineral that is essential for the production of thyroid hormones. It is found naturally in some foods, such as seafood and dairy products. Iodine supplements are sometimes used to treat iodine deficiency, which can lead to thyroid problems. Iodine may also have other medicinal properties, such as reducing the risk of certain cancers and improving cognitive function. However, excessive intake of iodine can be harmful and may cause thyroid problems. It can also interact with certain medications, so it's important to talk to a healthcare provider before using iodine as a supplement.

Iron is an essential mineral that plays a critical role in carrying oxygen throughout the body. Iron deficiency can lead to fatigue, weakness, and anemia. Iron supplements are often used to treat iron deficiency anemia and are available in various forms such as ferrous sulfate, ferrous gluconate, and ferrous fumarate. However, excessive iron intake can be harmful and cause symptoms such as nausea, vomiting, and abdominal pain.

Kava is a plant native to the South Pacific islands that has been used for centuries as a ceremonial and medicinal drink. Kava is believed to have anxiolytic and sedative effects and is often used to promote relaxation and reduce anxiety. However, kava has been associated with liver toxicity and has been banned or restricted in several countries. It is important to consult with a healthcare provider before using kava and to avoid using it with alcohol or other medications that may cause liver damage.

L-arginine is an amino acid that is involved in several important physiological processes such as protein synthesis, wound healing, and immune function. It is often used as a supplement to improve exercise performance, reduce blood pressure, and treat erectile dysfunction. However, the evidence for these benefits is mixed and more research is needed to determine the optimal dosage and potential side effects of L-arginine supplementation.

L-tryptophan is an amino acid that is used as a dietary supplement to help with depression, anxiety, and insomnia. It is also claimed to have beneficial effects on cognition and immune function. L-tryptophan is generally considered safe when taken at recommended doses, although some people may experience gastrointestinal side effects, such as nausea and diarrhea. L-tryptophan should not be taken with certain medications or by people with certain medical conditions, such as liver or kidney disease.

Lactobacillus acidophilus is a type of beneficial bacteria that is commonly found in the human digestive tract. It is often used as a probiotic supplement to promote digestive health and boost the immune system. Some studies have suggested that Lactobacillus acidophilus may be helpful in treating certain conditions such as irritable bowel syndrome and vaginal infections. However, more research is needed to confirm these benefits and determine the optimal dosage.

Laetrile, also known as amygdalin, is a compound found in the kernels of various fruits such as apricots and almonds. It has been promoted as a natural cancer treatment, but there is no scientific evidence to support this claim. In fact, laetrile can be dangerous and has been associated with cyanide poisoning. It is not approved by the FDA for the treatment of cancer and should not be used as a substitute for conventional cancer treatments.

Lavender is an herb commonly used in aromatherapy, cosmetics, and as a flavoring agent in foods. It is claimed to have calming effects and to help with anxiety, depression, and insomnia. Lavender is also used topically to relieve pain, promote wound healing, and treat skin conditions such as acne and eczema. Although lavender is generally considered safe, some people may experience allergic reactions or skin irritation. It should not be taken internally without consulting a healthcare provider.

Licorice root has been used in traditional medicine for its purported anti-inflammatory, antiviral, and antioxidant properties. It is claimed to be beneficial for digestive health, respiratory problems, and to help with menopausal symptoms. Licorice root is also used topically to soothe skin irritation and to treat cold sores. However, licorice root may interact with certain medications and should be used with caution in people with certain medical conditions. Long-term use may also lead to high blood pressure and other side effects.

Lipase is an enzyme that helps the body break down fats in food. It is used as a dietary supplement to aid in digestion and to help with conditions such as cystic fibrosis and pancreatitis. Lipase supplements are generally considered safe, although some people may experience gastrointestinal side effects such as nausea, diarrhea, and stomach pain. Lipase supplements may also interact with certain medications and should be used with caution in people with certain medical conditions.

Lutein is a carotenoid that is found in high concentrations in the eyes and is claimed to have beneficial effects on eye health. It is also used as a dietary supplement to help with conditions such as age-related macular degeneration, cataracts, and eye strain. Lutein is generally considered safe when taken at recommended doses, although some people may experience gastrointestinal side effects or allergic reactions. Lutein supplements may also interact with certain medications and should be used with caution in people with certain medical conditions.