F-plan

The F-Plan Diet is a high-fiber weight loss diet created by British dietitian Audrey Eyton in the early 1980s. The "F" in the name stands for fiber.

The premise of the F-Plan Diet is that by increasing your intake of fiber-rich foods, you can feel fuller and more satisfied, which helps to reduce overall calorie consumption. It's based on the concept that dietary fiber is low in calories and takes longer to digest, thus prolonging feelings of satiety and helping to control appetite.

The diet encourages the consumption of whole grains, legumes, fruits, and vegetables while limiting the intake of high-fat foods, refined carbohydrates, and sugars. In its original form, the F-Plan Diet recommended consuming up to 1,500 calories per day, with a significant proportion of those calories coming from dietary fiber.

In the initial stage of the diet, it's suggested to aim for a fiber intake of 35-50g per day, which is significantly higher than the daily fiber intake recommended by most health organizations (25g for women and 38g for men, according to the Institute of Medicine).

However, such a rapid and significant increase in dietary fiber can lead to digestive issues like bloating, gas, and stomach cramps. Therefore, it's recommended to increase fiber intake gradually and to ensure adequate fluid intake to prevent digestive discomfort.

While the F-Plan Diet can contribute to weight loss due to reduced overall calorie intake, it is not considered a long-term solution for weight management. Any weight loss plan should include a balanced diet alongside regular physical activity, and changes should be sustainable and enjoyable for long-term success. As always, before starting any diet plan, it's best to consult with a healthcare provider or a registered dietitian.