| Subject | Contents |
| Definition | A disease caused by a deficient diet or failure of the body to absorb niacin (one of the B complex vitamins ) or an amino acid ( tryptophan ). Common in certain parts of the world (in people consuming large quantities of corn), the disease is characterized by scaly skin sores, diarrhea , mucosal changes, and mental symptoms (especially a schizophrenia-like dementia ). It may develop after gastrointestinal diseases or alcoholism . |
| Alternative Names | Vitamin deficiency - niacin; Deficiency - niacin |
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| Support Groups | |
| Expectations (prognosis) | |
| Complications | |
| Calling your health care provider | |
| Prevention | |
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