Caffeine Stimulates Hair To Regrow, Strengthens It And Makes It Strong And Healthy. Guarana Extract Nourishes And Revitalizes The Hair, And Improves The Fixation Of The Hair Roots In The Hair Bulb. Your Hair Becomes Stronger And More Resistant To Falling. Muira Puama Tree Bark Extract Plus Hope Inhibits The 5-Alpha Reductase Enzyme Responsible For Male Pattern Hair Loss.