the rapid transport of nicotinamide from the lumen to the perfusate and the lack of 14c-metabolites of nicotinic acid in the intestinal tissue following intralumenal injection of [ 14c ] nicotinamide in the living animal suggest that deamidation in the digestive tract is not a major fate of physiological quantities of niacinamide .
C0027996
nicotinamide
C0028027
niacinamide