Androgenetic alopecia is a common form of hair loss. In men, it is known as male-pattern hair loss. Androgenetic alopecia is responsible for more than 95 percent of all male hair loss. It occurs when normally large, active hair follicles begin to shrink over time because of a genetic predisposition and increased levels of dihydrotestosterone, or DHT. There is no cure for androgenetic alopecia, but there are treatments.
Finasteride
Finasteride, a prescription steroid compound, blocks the production of DHT, preventing the hair follicles from shrinking and allowing them to grow normally. Finasteride is generally considered the most effective treatment for male-pattern baldness, although it is more expensive than its counterparts. Results can usually be seen within three to four months, with hair returning to its normal condition when treatment is stopped.
Minoxidil
Minoxidil is the most common treatment for male-pattern baldness. It is a topical solution. Minoxidil works by enlarging the shrinking hair follicle. It may also extend the growth phase of hair, permitting it to become longer before it falls out. If minoxidil is working, new hair will appear in three to four months . When the treatment is ceased, however, shedding will resume.
Tretinoin
Tretinoin is a vitamin A acid. Tetinoin works best when combined with minoxidil. Originally developed to treat acne and other skin conditions, tretinoin has more side effects than other hair-loss treatments, including light-sensitivity, blistering and skin discoloration.
Saw Palmetto
According to Follicle.com, because saw palmetto is a DHT blocking anti-androgen similar to finesteride, it may also be an effective treatment for hair loss. As of 2010, however, no studies had been done to test saw palmetto's relationship to hair regrowth.
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