Steroidal saponins are a steroid "building block" that are a blueprint for the body to create its own steroids. They are a steroid building block. According to the Southwest School of Botany, they are not actual anabolic steroids.
Steroidal saponins, according to the Southwest School of Botany, are a plant constituent or a secondary metabolite that helps the body create steroids to stimulate muscle growth and raise testosterone levels.
There have been no harmful side effects reported in any clinical study or human trials related to steroidal saponins, at the time of writing (Oct. 2009).
Steroidal saponins are a naturally occurring plant compound, and therefore have been deemed legal.
Bodybuilding.com states that the steroidal saponins compound is derived from the Tribulus terrestris plant. Tribulus terrestris is a vine-like plant grown in tropical climates.
Steroidal Saponin Applications
Athletes and body builders have stated performance increases due to steroidal saponins. It also has noted applications in erectile dysfunction.