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  • Grapefruit diet


    The grapefruit diet, also known as the Hollywood Diet is a short-term fad diet that has existed in the United States since at least the 1930s. The diet is based on the claim that grapefruit has a fat-burning enzyme or similar property. The variations of the grapefruit diet that are too low in calories (below 800–1,000 calories a day), too low in carbohydrates, or too low in essential micronutrients are considered unhealthy and potentially dangerous. While eating half a grapefruit with every meal may be a good way to incorporate more fruit in the diet of a healthy person, grapefruit and grapefruit juice is harmful if the dieter is taking medicines that can interact with grapefruit juice or is allergic to citruses. This diet will not be beneficial to anyone over a long time as the extremely low calorie intake could lead to malnutrition and many health problems. The grapefruit diet also does not require exercise. The grapefruit diet is a low-carb diet. It suggests that grapefruit helps burn body fat when eaten with foods high in dietary fat, which is why the grapefruit diet encourages consumption of meat, eggs, and other foods that are rich in fat and protein.

  • Protein-sparing modified fast


    A protein-sparing modified fast (PSMF) is a very low calorie type of fad diet; it includes a protein component, fluids, and vitamin and mineral supplementation. The diet is to last about eight months. While people often lose weight, they frequently regain it afterwards. Health concerns include dehydration, hence fluids, vitamin and mineral (potassium, magnesium, sodium, and calcium) supplementation is mandatory and doctor's supervision is recommended. Since PSMF includes little or no fat, the rapid weight loss may cause gallstones. It is therefore recommended to consume at least a minimum amount of fat daily. PSMF diets consist of foods that are naturally rich in good-quality protein and particularly extremely low in fats (chicken breast, extra lean beef, tuna, egg white, ham, cottage cheese)

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