Which product is commonly used to promote hair growth?

Minoxidil is commonly used to promote hair growth and is recognized for its effectiveness in treating various forms of hair loss, such as androgenetic alopecia, or male and female pattern baldness. It is usually applied topically to the scalp, stimulating hair follicles and increasing blood flow to the area, which enhances hair growth and thickness over time.

Other options, while they may be related to hair health, serve different purposes. Finasteride is an oral medication that helps in preventing hair loss by blocking the conversion of testosterone to dihydrotestosterone (DHT), but it is not used topically like minoxidil. Biotin, a B vitamin, is often marketed as a supplement for improving overall hair health and strength, but there is limited evidence directly linking it to increased hair growth compared to minoxidil. Keratin is a protein that makes up hair, skin, and nails, and while it contributes to the strength and appearance of existing hair, it does not promote new hair growth.