Niacin is a B vitamin that helps increase red blood cell production. Its in every piece of real bread and meat you eat. Flushing is normal and I have had severe flushing and redness and then minor flushing and redness. Its not an allergy because taking an antihistamine for it would be pointless. I could see where some people may be more sensitive to a concentrated dose. If this was the reactive ingredient in Curva- the FDA won't do anything about it because it is an essential vitamin. Is there a possibility you were dehydrated? So glad you weren't more seriously injured- Head injuries can be BAD.
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