Finally, there are those who claim that a high Protein intake is the most common cause of osteoporosis in Western Societies. While high protein intake - particularly from Fad Diets - is definitely a concern not only for osteoporosis, but also kidney functions, it is phosphorus, the end product of protein metabolism that needs to be evaluated. It really doesn't matter whether one deals with abnormally high phosphates from high protein or high grain consumption. Subsequently, high protein intake is safe in regard to bone density and kidney functions as long as an individual's phosphorus status remains normal... Full Text