I'm 27, and I can say my ability to grow a beard has slowly improved, though I don't have anything full. That said, I do have a twin brother who can. I have a f

I'm 27, and I can say my ability to grow a beard has slowly improved, though I don't have anything full. That said, I do have a twin brother who can. I have a few marks on my face, so maybe your theory is on to something!