Dude, Coq10 won't do anything to your hair.
Coq10 is important for ATP and a lot of biochemical process and your body but it wont do anything on your hairloss.
Personnaly, i checked my Coq10 blood levels at 30 and i was lacking of it ( below the low range), so i take 200mg each day since 5 years now ( good for ATP production and anti aging).
I don't feel any changes but it's good to have good coq10 levels for your whole body.