Soy protein is already proven to benefit people with high cholesterol, but a new study suggests that soy in the diet might benefit people with normal cholesterol levels.

A preliminary study of 150 Chinese men and women with normal cholesterol levels found that adding 40 grams of soy protein to their diet daily for three months raised the level of "good" cholesterol, which is high-density lipoprotein (HDL) by almost 5%.

"We were excited about this finding, to find that soy protein intake increased HDL by 5% which is significant," said Dr. Jiang He, lead author of the study and an associate epidemiology professor at Tulane University in New Orleans.
Soy's efficacy in lowering the LDL levels in people with high cholesterol has led to the American Heart Association's (AHA) Nutrition Committee recommending the wider use of soy products for those with the high cholesterol.