BLACK TRIBULUS contains tribulus terrestris extract, a herb that is well known in Ayurvedic medicine. One of its active ingredients at a biochemical level are steroidal saponins. These substances in plants have a molecular structure similar to testosterone. In the case of tribulus terrestris, it comes in a high concentration. Tribulus terrestris increases and accelerates the synthesis reactions of new proteins, and therefore the creation of new body tissue. In other words, it favours anabolism.