It helps reduce the nitric oxide from dht and something something, I haven't read enough. Someone posted this to me on another forum:
"
If your open to change, I suggest that you look into red lights. For the past 6 months, I have been using the handheld LGS7 from
Red Light Therapy . I have had good results; new growth and some re-pigmentation. The handheld devices are the best value and not much of a financial commitment. They are also very versatile. I shine the light on my scalp, my thyroid and my liver area.
I became convinced of the utility of red light after reading reviews at Amazon for a helmet. The price tag for the helmet is outrageous but reading the reviews are free. Here is a link.
https://www.amazon.com/iRestore-Las...8&qid=1526952259&sr=8-3&keywords=laser+helmet
Best of luck."
The red light he is using is $65