I'm gonna assume the bacteria they're talking about is candida. The autoimmune response is associated with (or more accurately, it is
) chronic, systemic inflammation. Chronic inflammation is bad, and I go pretty far out of my way to counter that, including measures to restrict the overdevelopment of candida.
I'm pretty unconvinced that inflammation has much to do with balding. Or, even if it is, that we can restrict it enough to have an effect on balding. I'd like to think that if we could, I would have noticed something by now. Buuuuut, maybe not.