A new study in Australia has found that even healthy men can benefit from increased amounts of soy foods in their diets. One hundred and eight healthy men were enrolled in a trial conducted by a team of six researchers at medical schools and hospitals in Clayton and Victoria, Australia. The men, aged 50 to 75 years, received either soy protein isolate or a casein placebo. The soy protein isolate contained 40 grams of soy protein and 118 milligrams of isoflavones. After the three-month test period, it was found that the men who consumed soy protein had lower blood pressure and lower levels of cholesterol and also of triglycerides, which are fats that can cause heart problems when too high. The study also included 105 post-menopausal women, also aged 50 to 75 years, who were given the same soy diet than that of the male test subjects. The women who received the soy protein also responded favourably, compared to those who received the placebo, the researchers reported in the Journal of Clinical Endocrinology and Metabolism. The research team, headed by Dr. Helena J. Teede of Monash University, urged further research on test subjects who have high blood pressure and high levels of cholesterol and other blood fats. Concluding that soy can help prevent heart disease, the researchers also noted that their tests found lower levels of endothelial function in the male subjects, but not in the post-menopausal women. The endothelial function is important in preventing hardening of arteries, and further research was termed necessary before health recommendations can be made.