Hello, I can understand your concern for less hair in the middle portion of your mustache. It appears from your query that you are quite stressed regarding your hair growth. The basic fact for the hair growth you have to understand is this is first and foremost depends on your family pattern. It means you would be having the same kind of pattern of hair as your fore fathers had. So it is a process which varies from one person to the other person and would also be different in two brothers and in twins also. If I were your dermatologist then would have suggested you to apply minoxidil lotion and take biotin tablets. Hope it helps.