I'm currently reading an interesting book by HL Newbold called Type A Type 
B Weightloss.  My interest in this book arose after I'd read a study he 
conducted on his patients with high cholesterol levels.  He advocated what 
he called a "stone age" diet and believed that meat and fat were not the 
problem but rather the addition of "new foods" and certain "modern" foods-- 
which he defined as grains, sugar, milk and milk products although he notes 
some can tolerate unsalted butter, beans, peas, all processed foods, all 
foods that must be cooked before they can be eated, and NUTS -- he says 
that although they are not a "new food," they were unavailable to our 
European ancestors during the 65,000 year Wurm glaciation. And he 
postulates that this length of time was sufficient for many of his patients 
to have inherited a biochemistry that cannot function properly with nuts. 
Nuts have always created uncontrollable binges for me -- I just cannot eat 
a reasonable amount --so maybe his theory holds true for me.  Anyway, 
Newbold allowed his patients fresh meat WITH the fat intact, and up to 
several servings of raw fruit and veggies.  All of the patients saw their 
cholesterol plummet after several months despite eating plenty of fatty 
meat.  

Newbold himself had always been slender until after medical school.  As an 
overworked, underpaid young doctor, he and his collegues became hooked on 
the unlimited sweets, starchy meals and goodies etc that they were given at 
the cafeteria -- he said they all started to gain weight but it wasn't 
until he had a heart attack that he decided to do something about his 
weight.  Low calorie left him hungry and weak -- through trial and error he 
realized that animal protein with the fat and limited raw veggies and raw 
fruit enabled him to lose weight quickly and also gave him tremendous 
energy -- also, his previously "high" cholesterol plummeted.  

What is interesting/different about his book is that he discusses the 
ability of "new" foods to create food addictions where one MUST have a 
certain food and where the elimination of such foods causes temporary 
physical withdrawal symptoms ie headache, nausea, sweating, restlessness, 
irritability, fatigue etc.  He also explains that new foods can also 
cause "spree" eating -- insatiable binging where you eat and eat until you 
feel like you could explode!  A person can suffer from both types of 
problems -- Newbold says he himself suffered from both and that both 
completely knock out one's appestat.  There is also interesting info on the 
ability of other things such as chemicals,cooking methods, molds etc to 
completely knock out one's appestat.

This book is out of print -- but well worth the search for it at used 
booksellers or inter-library loan