Better Not Younger Superpower Fortifying Hair & Scalp Serum The leave-in Better Not Younger Superpower Fortifying Hair and Scalp Serum ($47) uses nourishing ingredients you'll likely recognise from skin-care routines – like centella asiatica, niacinamide, and caffeine — but here they support healthy follicle function and hair growth instead. Image Source: sephora.com Better Not Younger Superpower Fortifying Hair and Scalp Serum $47 from sephora.com Buy Now