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What causes hair lossThere are many different causes of hair loss all with different treatments. We will cover the more common causes below. The most common cause of hair loss, or alopecia, is often referred to as male patterned baldness. More appropriately, this condition is termed androgenic alopecia, and can effect women as well as men. 25% of men aged 25 years have some degree of clinically apparent androgenic alopecia and over 40% of men will develop androgenic alopecia at some point in their life. Androgenic alopecia results from progressive shortening of the anagen cycle with resultant decreased time for hair growth. Hair loss usually begins with the frontoparietal scalp and then the vertex. Female-pattern baldness is similar but more diffuse, without complete baldness and maintaining the anterior hairline. Fortunately hairs on the sides and back of the scalp are androgen-independent and thus do not suffer from androgenic alopecia - it is these hairs which are used for hair transplants and why hair transplants last.In fact, if you look at the number of doctor visits for hair loss you will find that more women than men have the problem. This is interesting because millions have been spent on male hair loss research and hardly any on female hair loss. Women were usually expected to just cover up the problem with a wig or a hat.One treatment that has been approved by the US FDA is the drug Minoxidil. This topically applied drug is absorbed through the scalp and protects the hair roots from the main culprit of hair loss, DHT. It has been found by the US government that if DHT is limited or inhibited from attacking the follicles then the hair growth will be extended longer. This seems to be the key to hair loss treatments.DHT is formed from the hormone testosterone. Many people call it the male hormone but in reality it is found in both men and women. The DHT will attack the hair follicles and cause them to stop producing keratin. Keratin is the material that the hair shaft is constructed of. Limiting DHT by inhibiting its production or shielding the follicles from it is effective at slowing or stopping hair loss.