Tribestan is a completely natural non-hormonal herbal (phytochemical) biostimulator derived from the plant Tribulus terrestris L., Bulgaricum, which contains predominantly saponins of furostanol type (not less than 45% in Tribestan), with prevailing quantity of protodioscin. It is a natural herbal alternative to synthetic anabolic hormones without any clinically proven toxic effects.

Nearly 20 years of experience with natural herbal Tribestan administration has seen no toxicity and negative effects to date.