Tryptophan leads to niacin pathway in various skin diseases.
D000169:Acrodermatitis / Q000378:metabolism; D004890:Erythema / Q000378:metabolism; D005260:Female; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000378:metabolism; D008223:Lymphoma / Q000378:metabolism; D008297:Male; D009539:Nicotinic Acids / Q000378:metabolism*; D010267:Parapsoriasis / Q000378:metabolism; D010383:Pellagra / Q000378:metabolism; D011164:Porphyrias / Q000378:metabolism; D012595:Scleroderma, Systemic / Q000378:metabolism; D012871:Skin Diseases / Q000378:metabolism*; D013472:Sunlight; D014364:Tryptophan / Q000378:metabolism*
D009539:Nicotinic Acids; D014364:Tryptophan