How often can a 0.50mm, 0.75mm Derma Roller be used on the scalp?

June 27, 2017
Asked By:SkinTone in Philadelphia, PA

In order to regrow hair, how often can a 0.50mm, 0.75mm Derma Roller be used on the scalp? If you don't want to use Minoxidil what else can be used.

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