Is male pattern baldness 100% hereditary? Could a guy who eats greasy sugary fast food daily grow old with a full set of hair depending on genes?

Maybe. Maybe not. A "full set" of hair at age 90 is not the same amount of hair as a "full set" of hair at age 19. Such a guy could be normal at both age 19 and 90, and have a "full set" of hair at age 19 and at 90, but will have a lot fewer hairs in his "full set" at age 90. Reality is reality. Don't worry about the hair. It's just hair.

Related Questions

Is male pattern baldness 100% hereditary? Could a male who eats greasy sugary fast food daily grow old with a full set of hair depending on his genes?

I don't think so. I've been doing medicine for four decades, kept up with everything interesting, and I've never heard or seen anything to believe that what you've just asked about is anything more than something totally made up. If hair loss is a worry, ask about medical or surgical treatment. Even better, man up, shave your head, hit the gym hard, and look better than 99% of other guys. Read more...