Can low level laser therapy promote hair growth? i am willing to use it even if it is minimal - what hairmax claims - 20 hairs per sq cm or even less.

I don't know of any : Studies that show this. Theoretically, this could increase blood flow to the scalp (already has a great blood supply). But most hair loss in men is genetically programmed, &/or related to testosterone's negative effect on the hair follicle. Minoxidil/rogaine blocks this, so can sometimes help. I'd try it first. It won't give you a lot of hair & you have to keep using it.