Dairy

Because hunter-gatherers did not milk cows, a rigorous paleo diet excludes dairy products. Milk, butter, yogurt, sour cream, and cheese are all examples of this.

Some paleo dieters, however, believe that dairy is fine, especially if it is grass-fed, because grass-fed butter, for example, has higher omega-3s. Fermented dairy products, such as kefir, are also acceptable to some paleo dieters since they contain less lactose and casein, which are two of the most common concerns paleo dieters have about dairy. Non-dairy products produced from coconut milk, almond milk, and cashew milk can be substituted if you prefer to avoid dairy on the paleo diet.