title: GI absorption of niacin in humans.
abstract: By using the GI tube technique, niacin was shown to be equally well absorbed from the stomach and the upper small intestine. The maximum plasma niacin concentrations occurred 10-20 and 5-10 min, respectively, after instillation. Thus, the physiological prerequisites for a physically retarded niacin preparation were established.
mesh_terms: D005753:Gastric Mucosa / Q000378:metabolism; D006801:Humans; D007408:Intestinal Absorption; D007421:Intestine, Small / Q000378:metabolism; D007441:Intubation, Gastrointestinal; D008297:Male; D009539:Nicotinic Acids / Q000097:blood / Q000378:metabolism*; D013997:Time Factors
chemical_list: D009539:Nicotinic Acids