“…Excessive consumption of the B vitamin, niacin, can cause an acute onset of flushing, pruritis, rash, and burning or warmth in the skin, especially on the face and upper trunk (DiPalma and Ritchie, 1977), although gastrointestinal discomfort is noted in some patients (Press and Yeager, 1962). Outbreaks have occurred from the excessive enrichment of flour used to make pumpernickel bagels (Campana et al, 1983) or corn meal (Press and Yeager, 1962).…”