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    Niacin (Vitamin B3) Nasty Flush/Rash

    My multivitamin (ProSource MegaMax) recently reformulated with "higher end B vitamins." Unfortunately, the B3 is now pure Niacin. Apparently, pure Niacin can cause a major allergic reaction. My reaction was somewhat minor with rashes dotted along my arms, neck and legs. I also had a...