How to increase facial hair growth. I'm 25+ yrs old. Seeing very few hairs in my face. How to increase beard and moustache?
Will harmon injection help in this?

Not all men becomes hairy at their adulthood. Hormone do have that function, but I don't know can it be used just to make you have more hair. Why don't you try 1st any hair growth cream/oil for external use?