5. Theyโ€™re Not Designed for You, Personally

Why is it that your best friend has so much success with her diet plan, but when you try it, it just flops?

It might be because you two are just plain different.

Even the old food pyramid was designed for different peopleโ€ฆ and so are diets.

Fad diets, however, arenโ€™t something you can personalize โ€” yet another reason fad diets donโ€™t work.

They Can Be Expensive