Originally posted on TIME:
For weight loss, the paleo diet, which is what our ancestors ate when they had to hunt or gather their food instead of growing it, seems like a good idea. It’s high in protein and fiber—and anyone who’s ever tried to lose weight has been told that the secrets to slimming down are protein and fiber, which take longer to transit down the digestive system making us feel fuller longer. Processed carbohydrates, on the other hand, zip through our system making us hungry seeminly minutes after we’ve put down the fork.
The high-fiber part, paleo diet devotees maintain, is the key. Because fiber is bulkier and harder to digest, it serves as an appetite suppressant by effectively turning off hunger signals. Except that’s not what scientists found when they put the ancient paleo diet to the test—in a test tube.
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