Designed for male vitality, Alpha King™ by Force Factor is a premier free testosterone booster.** Alpha King™ is a new generation of fenugreek seed extract, with enhanced bioavailability to help support free testosterone.** The secret to its success resides in its high concentration of sapogenins, a constituent compound of fenugreek that is believed to block the enzyme responsible for converting testosterone to estrogen. It's non-proprietary formula also contains traditional male health ingredients, including Black Maca, for muscle health and performance.** 30 capsules. From Manufactured By: Force Factor