Donald Trump and his hair! Tony O'Donnell, Ph.D and Mark talk about Donald Trump's hair and how to grow hair naturally. DHT is the hormone that stops hair growth. This is a hormone that actually stops the hair follicles from releasing the vital nutrients needed in the hair shaft itself and this stops hair growth. It's difficult to get rid of the DHT hormone but we talk about how to deal with this naturally. We talk about shampoos to use as well. What will happen to The Donald's hair if he makes it too the white house, we know that presidents age significantly while in office. Diet is a crucial element in hair growth. What The Donald eats and his health can help keep is famous locks in place.