Pellagra prevention.
D000293:Adolescent; D000328:Adult; D000368:Aged; D004044:Dietary Proteins / Q000008:administration & dosage; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009539:Nicotinic Acids / Q000032:analysis; D010383:Pellagra / Q000517:prevention & control*; D014364:Tryptophan / Q000032:analysis; D003313:Zea mays
D004044:Dietary Proteins; D009539:Nicotinic Acids; D014364:Tryptophan