Exactly which items do and do not fit into the Paleodiet food list is not always an easy answer to follow. In its purest form, the theory of the Paleodiet states that if your ancestors didn't eat it - you shouldn't either. The list below represents the strict application of the theory.
On the other hand, some foods that our ancestors did not eat are known to be very nutritious. For example beans are a great source of numerous nutrients and dairy products can be a great source of calcium and protein. Some experts urge that a slightly less strict, slightly more modest form of the Paleodiet should be followed for optimal health. It is up to you as an individual to choose first if you should - and then how to - implement the Paleodiet in your own life.
Below is a list of foods that are encouraged or discouraged in the Paleo diet. This list was obtained from the book Paleo Diet by Loren Cordain (Wiley and Sons, New York 2002 pages 104-112).
Lean poultry (white meat, skin removed)
Eggs (limit to six a week)
Nuts and Seeds
Foods To Be Eaten In Moderation
Foods You Should Avoid
Cereal Grainlike Seeds
Soft Drinks and Fruit Juices