In my early twenties and hair line appears to be receding. I am male and vegetarian, would like advice.

I don't really have any advice except to say that, although not normal, it is common.

How is the hair in your family? It could just be a gene thing. I started getting "light" up top around 30. My brother-in-law went completely bald in his early 20's.

2 things I know that really speed up the hair loss process is oily skin and (as silly as it sounds) wearing hats. Changing shampoos might help as might trying to keep from wearing hats (winter caps, ball caps, etc.) when not necessary. Anything that restricts air flow on your head really.

Sometimes there is nothing physically you can do if it is in your genes.