What Are Side Effects of Procapil?

A study published in the journal Molecules in 2013 reported that the key ingredient in Procapil, oleanolic acid, causes liver damage when ingested by mice. According to a study published in 1988, oleanolic acid also causes infertility in rats, but the effect was temporary and went away after use of the substance was stopped. Apigenin, another ingredient of Procapil, was shown to exhibit significant cell toxicity at even very low concentrations in a study published in 2008.