Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "
Reduction of prostate cancer risk by a few tablespoons of beans a day
Men who eat an average of three large tablespoons of peas, kidney beans or other legumes every day roughly halve their risk of prostate cancer. This is suggested by an epidemiological study published in the British Journal of Nutrition.
However, a high intake of peas and other legumes appeared to reduce the risk of prostate cancer. The number of men who developed prostate cancer in this study was small, but the association between legume intake and prostate cancer was nevertheless statistically significant.
Men who ate an average of more than 26.5 grams of legumes per day had a 47 percent lower risk of prostate cancer than men with a lower intake.
Click on the table and figure below for a larger version.
Research technical details about the data can be found here.
The strongest phytoestrogens in our diet are those in soy. When Diallo brushed off the effect of soy consumption, legumes still protected against prostate cancer. So this is not the complete explanation.
Another possibility is that the fiber in beans, which slows the absorption of carbohydrates, is causing the effect. Some tumor types grow faster with high glucose levels. This is not the case for eighty percent of prostate cancer tumors.
"As very few prospective studies have been published on the topic, these results should be confirmed by large-scale observational and intervention studies."