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The premise of the paleolithic (paleo) diet is simple: Eat only foods that existed during the hunter-gatherer era. That means grass-fed meats and wild fish, fruits and vegetables, and nuts and seeds (including their healthy oils), while excluding all dairy, legumes and grains.

This pre-agricultural, clean-eating approach has spawned a hungry tribe: In 2015, paleo-certified foods sales exceeded $750 million, according to Nutrition Business Journal.

But where’s the beef and what’s chaff? Let's unpack some common stereotypes to find out.