A member asked:

Can you tell me about creatine products (gnc vs muscle pharm)?

A doctor has provided 1 answer
Dr. Mohammed Karim answered

Specializes in Internal Medicine

Not FDA regulated: None of these products are FDA regulated. Check the ingredients as there is an increase incidence of herbal nephropathy. Talk to your PCP and know your health status before using any supplementation. Excessive of creatinine use and muscle mass will put a burden on Kidney. If you decide to take it, drink plenty of water (>3 liter/d), check kidney function and CPK periodically

Answered 5/19/2015

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