How effective is PRP in African- American patients?

The effectiveness of PRP in African-American patients depends upon the indication.  For example, it usually  works well in Androgenic Alopecia. We have had results with many traction alopecia  patients.  CCCA patients occasionally respond depending on the time the hair has been dormant.  Overt scarred areas will not  regrow. Find a PRP expert. 
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I am not sure what problem you are wanting addressed with PRP-facial rejuvenation, hair restoration or O shot. PRP works well in African Americans. The growth factors in the PRP help with rejuvenating all skin types. I have seen wonderful results with PRP Microneedling and injections for acne scarring in African American skin.

PRP is a restorative regenerative treatment that improves the tissue it is injected into.  In the hair restoration field, it shows great improvement in healing post procedure and can also be used annually (depending on the method used) to reverse the aging process of follicles.