LG Sciences uses the most refined extracts of tribulus terrestris in the new Tribe Extreme.  With the proper ration of all natural herbs to extract at 40% saponins.  This enhances the formula for the best herbal testosterone boosting on the market, but we then add 50:1 standardized extract of Tonkat Ali (better known as Long Jack) to give superior libido performance, increased testicular weight and stronger erections.  Zinc Asperate is included to give you increased sensitivity to the muscle building effects of testosterone by increasing androgen receptor sensitivity with Tribe Extreme.  Zinc Asperate is the potent ingredient found in popular ZMA formulas. Finally to make it TRIBE EXTREME we added the newest herbal superstar in testosterone boosting, Dodder Seed extract.  Dodder Seed is shown in studies to boost testosterone and LH production: “[Dodder Seed} increased the weights of testis, epididymis and pituitary gland, and stimulated T and LH secretion both in vitro…” according to one study and there are many others that tout the health benefits of Dodder Seed for increasing testosterone production.