Hair growth serum is a topical treatment applied to the scalp to stimulate hair follicles and promote hair growth. It often contains active ingredients like minoxidil, which has been clinically proven to increase hair count and thickness.
Hair growth serums may also include vitamins, minerals, and botanical extracts to nourish the scalp and support healthy hair growth. Historically, minoxidil was developed in the 1980s to treat high blood pressure but was later found to have hair growth-promoting effects.