The so-called “Paleolithic diet” is a fad diet, which advocates that people can lose weight and live healthier by eating the same foods our distant ancestors ate thousands of years ago during the Paleolithic Era, which lasted from the invention of stone tools roughly 3.3 million years ago until the Agricultural Revolution around 12,000 years ago. This diet originated in the 1970s and was popularized in the 2000s, primarily by the bestselling American writer Loren Cordain.
The Paleolithic diet is predicated on what is known as the “genetic discordance hypothesis,” which holds that, while the environment in which human beings live and the foods human beings eat have drastically changed since the end of the Paleolithic Era, the human genome has hardly changed at all. Therefore, proponents of the diet insist that human beings are not adapted to eat the foods we are now eating and we must return to eating the foods our ancestors ate over 12,000 years ago.
This diet claims that people should eat a diet that consists of meat, vegetables, fruits, nuts, and roots. People on the diet are usually prohibited from eating any grains, dairy products, sugars, legumes, salts, oils, alcohol, or caffeine, since, according to proponents of the diet, these are foods that did not exist during the Paleolithic Era. Unfortunately for practitioners of the diet, it actually bears very little resemblance to what people during the Paleolithic Era actually ate.
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