Introduced in 1985, the paleo diet aims to mimic the dietary patterns of humans prior to agricultural development. It claims humans should eat foods similar to those we evolved with and avoid foods we didn’t have access to during our evolution.

Followers of the paleo diet are instructed to eat as many lean meats, fruits and non-starchy vegetables as they want, as well as eggs sparingly. Dairy products, legumes, grains and processed foods are strictly off limits. The paleo diet doesn’t focus on portion size or caloric intake.