The paleo diet is designed to resemble what human hunter-gatherer ancestors ate thousands of years ago.
Although it’s impossible to know exactly what human ancestors ate in different parts of the world, researchers believe their diets consisted of whole foods and leading physically active lives. And since there were no factories, they did not eat processed foods.
The premise behind "eating paleo" is that the current Western diet is contributing to the rise of lifestyle diseases such as obesity, heart disease diabetes type 2 and cancer.
A simple guideline: If it looks like it was made in a factory, don't eat it.
Avoid all processed foods and ingredients, including sugar, bread, certain vegetable oils, trans fats and artificial sweeteners.