In a recent study, researchers randomly assigned 177 men at high risk of prostate cancer recurrence to receive a beverage powder containing 20 grams of soy protein isolate or placebo daily. Each participant started treatment within four months of initial prostatectomy and continued for a maximum of two years. Prostate-specific antigen measurements were taken every two months within the first year of treatment, and then every three months for the second year. The study was halted before completion due to lacking treatment effects. Read more here.
Study mentioned: Bosland MC, et al. Effect of soy protein isolate supplementation on biochemical recurrence of prostate cancer after radical prostatectomy: a randomized trial. JAMA. 2013 Jul 10; 310(2):170-8. PMID: 23839751
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