Many of them do not work. Products containing minoxidil and finasteride are FDA-approved and can be effective, but they can also have negative side effects.
7 Products That Promote Hair Growth Products
Women's Nutrafol...
Restorative Shampoo by Harklinikken...
Crown Scalp Scrub by R+Co.
Reserveage Nutrition Keratin Hair Boosting Powder with Biotin
Briogeo, Don't Give Up, Repair! ...
ColorProof BioRepair-8 Thickening Blow Dry Spray, ColorProof BioRepair-8 Thickening Blow Dry Spray, ColorProof BioRepair