The Primal Diet Primer You Need

7. Concerns

The Primal diet cuts out whole grains, which can be sources of vitamins, fiber, and other nutrients. Some medical experts feel that people following the diet may be depriving themselves of the benefits of those foods. Also, grains are typically much more accessible and affordable than Primal staples such as organic, wild, or grass-fed animal products.

Some researchers believe that the fundamental concepts of the Primal diet oversimplify the evolution of human dietary changes. These scientists argue that early humans may have eaten wild grains long before farming, perhaps 30,000 years ago. The experts also point to genetic studies showing that significant evolutionary adaptations occurred after the Paleolithic era, including an increase in the number of genes pertaining to the metabolism of dietary starches.