I am 21 years old. I don't have a moustache and beard. How can I grow one?

If you were not born with the genetic trait of having beard hair, there isn't much you can do to grow beard hair.  The only way to have beard hair is transplant surgery.

2,000 grafts for both sides is probably on the low side.  However, men do have different beard density patterns.  Your best bet is to find a reputable hair facility to guide you.  Other good questions like yours is answered in the attached video.  Good luck!

Beard transplantation results can look just as natural as a native beard, when done correctly by an experienced Doctor. The results may vary depending on the extent of the problem, therefore careful examination of the beard area needs to be done before the procedure. If head hair is used as...

Applying minoxidil on the face may cause skin irritation and contact dermatitis.If you are experiencing ingrown hair, acne or folliculitis, then you should visit a dermatologist.

The transplanted hair usually falls off and it will start to grow in after a few months. It takes up to a year for all the hair to grow in. Initially the hair that is growing in is feathery and fuzzy but it thickens up in six to twelve months. 

Beard hair growth is genetic and in some people it may take longer for it to grow out then others. You ned to be more patient to see if more hair grows in.  If it still does not grow after a few years, you can consult with a hair transplant specialist for a consultation.