How can i grow my facial hair you are 21 year old?

About the only way to increase facial hair is to increase the amount of testosterone in the bloodstream. A doctor could test for testosterone insufficiency and prescribe injections. But don't count on it. Facial hair also increases with age, so waiting works too. Men from some racial and genetic backgrounds have little or no facial hair even thought they have plenty of testosterone. And testosterone injections have side effects, like increased aggression and shrinkage of the testicles. Rogaine and Firaus Oil also come recommended by some people as a way to increase facial hair growth although it is not proven. Shaving frequently is a proven way to make facial hair more coarse, therefore appearing thicker. Shaving regularly will not increase the speed at which your facial hair develops however. Other suggestion include trying a DiHydroTestosterone cream named Androstanolone which is applied externally. It is available in brand name Andractim.