title: On the relative efficacy of nicotinamide and nicotinic acid as precursors of nicotinamide adenine dinucleotide.
mesh_terms: D000818:Animals; D001769:Blood; D002247:Carbon Isotopes / Q000378:metabolism; D066298:In Vitro Techniques; D008099:Liver / Q000378:metabolism; D009243:NAD / Q000096:biosynthesis*; D009536:Niacinamide / Q000378:metabolism*; D009539:Nicotinic Acids / Q000378:metabolism*; D051381:Rats; D014556:Urine
chemical_list: D002247:Carbon Isotopes; D009539:Nicotinic Acids; D009243:NAD; D009536:Niacinamide