Most people believe the only way to cure their hair loss problem is from the outside, by using a chemical treatment, shampoo or other topical treatment. These ways can work for you, but in recent medical studies the main cause of hair loss, at least 95% of the time, is either genetic and or hormonal. A hormonal by product, DHT, affects the hair follicles, making them thinner and shrink until nothing is left. Research found that balding men had increased levels of DHT in these areas.