Grapefruit diet

[1] There are variations on the diet, although it generally consists of eating one grapefruit at each meal, along with meat, eggs, other foods that are rich in fat and protein, and certain vegetables.

[2] initially, it was referred to as the "eighteen-day diet" in 1929 , consisting of grapefruit, orange, toast, vegetable and egg combinations for 18 days, totaling approximately 500 kilocalories (2,100 kJ).

[6] The idea that grapefruit eaten before a meal acts as a "catalyst" to burn body fat has no evidence from biochemistry.

[7] Carl Malmberg commented that it lacks in all the necessary minerals (calcium, phosphorus and iron) and in vitamin A.

[10][11] This diet will not be beneficial to anyone when followed long-term, as the extremely low calorie intake could lead to malnutrition and many health problems.