Eat like a baby. Cook like a caveman. Snack on one colour of the rainbow each day of the week.

These habits belong to some of the viral diets that celebrities from Beyoncé to Taylor Swift have sworn by.

Oddly enough, some of these eating plans contain nuggets of wisdom that could help you lose weight. Still, the bigger danger with any diet is that it sets us up for unhealthy habits we can’t maintain, says Andy Bellatti, a registered dietitian and the cofounder of Dietitians for Professional Integrity.

“I know many people who’ve gone on some kind of crash diet for a week and lose a bunch of weight and a few months later they’re back to square one.”

With that in mind, here’s the dirt on the strangest viral diets along with some science-backed wisdom about what actually works if you want to lose weight and keep it off.

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