much-hyped research compound targeting prolactin receptor in scalp  
        a copper peptide showing promise in both regrowth and reversing gray hair  
        the stimulant you know and love can be used topically to stimulate hair  
        An essential vasodilator with some anti-androgenic effects, has excellent safety record  
        the gold standard retinoid in dermatology that's also helpful for hair regrowth alongside Minoxidil