Guys and Gals,
Avoid this stuff!! Its nasty on digestion and really does a number on the gut!! To answer the biochem questions for the tech heads its actually and amino acid complex with a biological value of 77 (this ain't that great). It also reduces the transit time in the digestive system.

No for the real bad news. Casein increases cholesterol levels and increases atherosclerosis. This is one of the reasons why we should stop sucking cow's udders because casein is rich in dairy foods (particually cottage cheese). Although this is a low fat dairy food, it still causes heart disease (our biggest killer). Soy protein was found to improve cardiovascular health.

· Beynen, A. C., et al. Mechanism of casein-induced hypercholesterolemia: Primary and secondary features. Atherosclerosis. 60:291-293, 1986.

· van Raaij, J. M. A., et al. Influence of diets containing casein, soy protein isolate and soy concentrate on serum cholesterol and lipoproteins in middle-aged volunteers. American Journal of Clinical Nutrition. 35:925-934, 1982.

Also, casein reduces your life span by (ave.) 6 years (about 8%).

· Harman, D. Free radical theory of aging: nutritional implications. Age. 1:145-152, 1978.

I think I'll stick with soy myself!!