DHT is a derivative or a by-product of the hormone testosterone with the action of the 5-alpha reductase enzymes. It is a damaging compound to the hair follicles, making the hair to be more fragile thus leading it to break off easily from the scalp. If you decide to halt your hair loss problem, you must target DHT. One way of eradicating DHT in your body and in the scalp is to take saw palmetto extracts.