[Candace]

Reishi did nothing for "quality of life scores, peak urinary flow, mean urinary flow, residual urine, prostate volume, serum prostate-specific antigen or testosterone levels." Beta sitosterol, on the other hand, decreases International Prostate Symptom Score (5.3 points vs placebo compared to reishi's 1.18 points vs placebo), increases peak urinary flow, and decreases residual urine. Reishi may look good in a test tube, but its half-life in the body is short so it's only going to be good for things like flipping gene switches or activating the immune system. Beta-sitosterol sticks around for days so it's perfect for enzyme inhibition.