I brought up the idea of Metabolic Typing in another post, which is a diet created by William Wolcott and recommended by Dr. Mercola, Underground Wellness, and the Chek Institute.
It is basically primal in that it looks to our evolutionary heritage to give context to why processed foods are killing us. William Wolcott's book talks extensively about choosing high quality nonindustrial whole foods, avoiding pesticides and other toxic crap, physical exercise, etc.
But beyond that, the idea is that certain people metabolize food differently. Some people will eat 2 pounds of steak in a day and feel great; some people will get constipated and want to go to sleep. Some people will eat only whole grains for a day and have tons of energy; others will be hungry every two hours and go on an emotional rollercoaster. We can trace a lot of these tendencies to our ancestors and the lifestyles they led. For every person, there is probably an ideal ratio of animal foods to plant foods, and if that ratio is eaten at every meal, the person will feel full for 4-5 hours, have lots of energy, be more able to combat stress, have more even moods, and sleep better. I notice that I win every time when I eat a whole ton of vegetables and a small to moderate portion of protein with every meal. No protein, I'm hungry. No vegetables, I don't digest well and get tired.
There are condensed tests to find your metabolic type online and in books, but there are more comprehensive ways of finding out if you talk to a specialist.
disclaimer: I am NOT a metabolic typing expert. Check out Dr. Mercola's blurb here - http://articles.mercola.com/sites/ar...ping-diet.aspx . Also here is a free but very basic metabolic typing questionaire from Paul Chek http://www.ppssuccess.com/FoodforThought/WhatisMetabolicTypingreg/tabid/309/Default.aspx
Sorry that was so long. What do you think?