If I may add my $0.02
PP and PPLP (Protein Power LifePlan, out in 2000, 5 years after PP) are more about total health than weight loss, which I would say is the predominate character of the low-carb eating plans. Weight loss is, of course, a benefit and usually helps the overall health picture.
As 2bthinner! pointed out - The starting out process for PP/PPLP is to determine how much protein your body needs per day. The Eades make a strong point of getting at least the minimum amount of protein you need since it is so important for ALL the bodies functions. The big issue with carbohydrates, as far as the Eades are concerned, is that they raise your bloods insulin level which messes up a whole lot of things, not just adding fat. So for the beginning period (induction), they want you to keep it low, 20 grams per day. I don’t remember an upper limit in the books, BUT in a blog, Mike Eades told how much glucose is needed each day by the body for those cells that lack mitichondria (the place where fat is burned in the cell). It is something like 150 grams, or as I remember a teaspoon of sugar in the blood is all that the body wants. More than that goes in to fat!
The big difference in PP/PPLP and other plans is the lack of specific directions - both an advantage AND a disadvantage. The Eades (better in PPLP) give you the basics of the diet and give you three sample diets ranging from loose to strict. Then they say the you can get 80% of the benefit with only 20% of the effort. That is if cutting carbs back to less than 100 grams per day and eating enough protein is easy for you.
They make a big point of saying the cholesterol is not the problem the media thinks it is. They want you to eat fats they call “good”, which are typically high in saturated fat, more stable than monosaturated and polyunsaturated, thus less likely to become rancid. Rancid fat becomes a free radical which damages the cells. I don’t remember them explicitly saying how much fat to eat, BUT you have to have enough energy for you body to function. Since you are not supplying carbohydrates for energy, you HAVE to supply energy through fat. AACKKK!
That is what most people are trying to get rid of. Well the body does not take dietary fat and store it (at least not as quickly and easily as it does carbs that the liver has converted to fat) partly because there are regulatory mechanisms that keep the gut for absorbing dietary fat that is not needed.
Then they strongly urge you to take certain supplements, and explain why. Usually it is because there is not enough in our food supply.
I should have looked this up first instead of rambling on. Sorry, it is getting late and I should be in bed!!