Although nothing can substitute for a qualified doctor or nutritionist evaluation and prescription. In the absence of any medical conditions (i.e., people with certain kidney/liver problems may experience problems on a high-protein diet), there is much advice out there (written word) about nutrition. I've read many books (including Akins NDR) and I agree with another post by Jerseygyrl that since his passing, Atkins Nutritionals has become somewhat of a "supplement pimp" (i.e., pushing their shakes and bars more than whole foods). Here's a link to a very good book written by Tom Venuto (world renoun and 15+yr veteran all-natural bodybuilder) entitled "Burn the Fat, Feed the Muscle". Is it an E-book that is rated #1 and worth every penny. It focuses more on 'real world experiences' and gives you simple explanations such as your OP...how much protein do I need. Here's an exerpt from the book on this:
"Out of twenty amino acids,the human body can make eleven of them. These are called non-essential amino acids (Also known as "dispensable amino acids). The other nine amino acids are called "essential amino acids: or "indispensable amino acids") Essential amino acids are those which can't be manufactured by your body and must be supplied from your food."
It goes on to list the 11 amino acids your body can produce and the 9 your body can't produce.
Then, it goes on to explain why you must eat "complete" proteins (all 20 amino acids) every three hours.
And...lastly, it goes on to answer the age-old question, What is the optimal protein intake for fat loss and muscle building:
"We will probably never have conclusive scientific proof of what the "optimal" protein intake is for gaining muscle and losing fat. That's why I believe the best place to look for answers in not necessarily at the research from the laboratory, but at the athletes "in the trenches" who have already achieved what you want to achieve. Bodybuilders and fitness models are among the leanest athletes on earth. Probably the only athletes who ever get as lean are those in ultra-endurance sports such as marathons and triathalons. The difference is that the bodybuilders reach the same low body fat levels while holding on to their muscle! A six-foot male marathoner could be a buck forty soaking wet! That's why it makes sense to find out what the bodybuilders are doing and use them as your role models...
He goes on to say:
"There are times when high protein intake is necessary. These include:
1) When you are trying to gain muscular body weight;
2) When you are using a low carbohydrate diet for fat loss;
3) When you are "carbohydrate sensitive"
Given researchers recent discovery of 0.8 grams per 1 lb of body weight as the recommended protein allowance, I'd say that's pretty close to the standard of 1 gram/1 lb of body weight that bodybuilders have been using for decades and with great results I might add.
Hope this information helps. If you are interested in reading more, you can find Burn the Fat, Feed the Muscle at
www.burnthefat.com. Good luck. Joyce