Boyfriend started balding at 20?

Taylor • Just a hippie tracking her period

My bf graduated in 2014 , and in all his graduation pics he had a head full of hair. Balding is prevalent in his family but his dad didn’t started balding until his late 20’s, early 30’s. His brother is 25 and is also bald. My bf’s hair grows very fast but his hair doesn’t grow at the top/front of his head.., just kinda lost how in 3 years that could happen.. he blames it on his last relationship and thinks his hair has been coming back since we got together, so I wanted to know if anybody has experienced a loved one balding early ? Or know any natural remedies or practices to make his hair grow back?