I would be concerned about whether it fits your body's metabolism. Some bodies do better with low carb, high protein, some don't. My wife is on a diet set up through the Curves organization. It is more like a South Beach diet. It specifically includes carbs, fats (the right kind) and protein.

The brain of a PCS person needs the right nutrient balance.

I would do a google search of Atkins diet and read the pros and cons.