If you watch soccer for 8 hrs everyday for 10yrs, you will have tons of soccer knowledge. No need doc's prescription.
Good! Very good... okay this is the thing... I buy 70% alcohol to clean the roller, then prepare a syringe for the serum (2ml for 1 face), then roller for about 20min, then apply post treatment gel... is kinda layche sometime. I use it becos it is like a face lift. It injures the surface of the skin so that the skin produces collagen to heal.
you can just apply on pimple or use it as a mask for 20-30min or apply it a thin layer on the face (no need to wash off before you apply suncreen) before you go out.