I don't think we can make a judgement call without a picture. It might be better to shave it, it might be better to just leave it be. In any case, my father is 58 or something and ended up losing all his hair up front. He did some kind of hair treatment and now you can't even tell he was ever missing it. I don't remember what he did, but I just wanted to tell you that there are treatments out there that might help a lot. Don't totally give up until you've researched and tried some procedures I too have heard of certain vitamins/minerals being good for hair growth, but I don't think vitamin D is going to magically grow it all back. Couldn't hurt to try though.