The paleo diet is a popular diet that advocates eating whole foods, such as fish, fruits, vegetables, and nuts, as our prehistoric ancestors did.
It is also known as the Stone Age diet, the caveman diet, and the hunter-gatherer diet. The diet excludes processed foods and includes healthy oils, fresh fruits, vegetables, nuts, seeds, meats, and fish. While there are various iterations of the paleo diet ranging from strict to relatively lax, the first step to following the paleo diet is to decide how strict a diet you can handle and then finalize which foods you’ll eat and which you won’t. Successful paleo meal planning and prepping for an extended period require bulk buying and freezing large packages of meat, fish, and seafood and buying frozen fruits and vegetables. The paleo diet has several potential benefits such as improved physical performance, mental clarity, and weight loss because it requires avoiding processed foods, refined grains, and large amounts of trans fats.
Source: https://www.cnet.com/health/nutrition/the-paleo-diet-rules-foods-and-potential-benefits/