In a previous post, I discussed how men who adopted a vegan diet and exercise could help reverse the signs of prostate cancer. That study included men who were vegan for 1 year. After 1 year all the men who went vegan saw their PSA levels stay the same, while men who did not adopt a vegan diet had an increase in their PSA. As previously mentioned, PSA (prostate specific antigen) is a marker in the blood that indicates the presence of prostate cancer. So what if the men ate vegan for more than one year? Well, Dr. Dean Ornish extended the study for two years and the results are still promising for men on active surveillance and want to adopt a vegan lifestyle: How can 2 years of eating vegan slow down prostate cancer? After 2 years on a vegan diet, only 5% (2