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Nutritional dermatoses are traditionally taught in the context of developing countries, famine, population displacement, and limited access to health care. In the United States, nutritional dermatoses may be underdiagnosed, leading to increased morbidity and utilization of hospital resources. These findings underscore the need for providers in developed nations to be able to identify these deficiencies. Dermatologists play a critical role in the diagnosis and management of patients with nutritional deficiencies, as they often present with cutaneous findings. Part 2 of this review series will focus on the epidemiology, impact, manifestations, and diagnosis of B-complex vitamins, which can present with cutaneous findings, including thiamine, riboflavin, niacin, pyridoxine, and biotin.