1.943761-1034533477
An individual has to eat half a grapefruit before every meal as the fruit has fat-burning properties. However, for this diet to work the individual cannot consume large meals — only 800 calories are allowed per day.
Anjum said: Similar to the soup diet, the weight lost is water from your body. Image Credit: Rex Features

1. Choosing the right one. One says eat anything but fat. The other says nothing but fat. How do you decide the one for you? 

2. Bad after-effects. Take the ‘tapeworm diet', for instance. How do you get rid of it after you've lost the kilos? 

3. The sheer absurdity of it all. Why would any diet (specifically The Atkins) advocate shunning carbs such as fruits and veggies? Since when did apples and carrots make you fat? 

4. The books you've got to read when following a fad diet. They're heavy, expensive and nobody will have them after you've dumped the diet. 

5. They make the supplements industry rich. And you poor - protein shakes and herbal teas cost big bucks. 

6. The number of times you have to eat uninteresting stuff. Followers of the cabbage soup diet will agree with me. 

7. They set you up for failure. Heard of the yo-yo effect? 

8. They promise weight loss without physical activity. Does that even sound logical? 

9. Confusing. Is it high carb, low protein or high protein, low carb, or is it no carb, all protein? 

10. The very fact that they are ‘fad' diets. You keep wondering when one will be replaced by another.