Niacin flush is a skin flushing that can occur after taking higher doses of niacin (vitamin B3) as supplements or prescription medications. It is a harmless and temporary side effect that usually goes ...
Niacin flush happens after taking 30-50 milligrams of niacin, causing redness and warmth. Other signs of niacin flush include itchy skin and tingling or burning sensations. Taking nicotinamide and ...