Niacin (Vitamin B<sub>3</sub>) Supplementation in Patients with Serotonin-Producing Neuroendocrine Tumor

Abstract

In serotonin-producing NET patients, niacin deficiency is prevalent. Therefore, urinary N1-MN deserves to be included in their standard biochemical evaluation. Niacin supplementation normalizes the niacin status in most niacin-deficient serotonin-producing NET patients. A prospective study is warranted.