The Grapefruit Diet, also known as the Hollywood Diet, is an 18-day diet, that dates back to 1930 Hollywood.

Grapefruit Diet. This diet allows to loose 3-4 kg per week containing enough vitamins, but it is not cheap. Contradictory evidence is not the only one: NOT TO EAT AFTER SEVEN PM.

Probably one of the longest existing diet formulas is the grapefruit-based diet