This diet involves drinking grape juice with certain meals every day for 12 days straight, followed by a 2 day break before repeating the cycle. The grapefruit diet gained popularity in the 1970s when people found that eating grapefruit with every meal or consecutively helped promote weight loss.

1. This diet consists of having Grape Juice with
certain meals everyday. You do the diet it 12
days straight then you take a 2 day break and
repeat.

2. The grape fruit diet started becoming popular back in the
1970’s when people found it better to eat grape fruit with
every meal or just eat it consecutively in a row to lose
weight.