Vitamin B3 deficiency

Symptom resolution

The patient should recover fully from vitamin B3 deficiency with niacin supplementation, and most symptoms resolve after 2 weeks of multivitamin therapy. Continued niacin supplementation may be advisable in patients with a history of chronic alcohol use disorder, inflammatory bowel disease (e.g., Crohn's disease), and following clinically significant small-bowel resection, or bariatric surgery.