natural substance from Neem tree with medicinal and pesticidal properties  
        bioflavonoid found in plants with antioxidant and hair stimulating properties  
        the gold standard retinoid in dermatology that's also helpful for hair regrowth alongside Minoxidil  
        much-hyped research compound targeting prolactin receptor in scalp  
        technique to create small wounds in skin to activate collagen production and hair growth