Diet: Vitamin B1 Deficiency May Affect from 1 in 6 to Nearly 1 in 3 Obese Adults.

Between 15.5% and 29% of obese patients seeking bariatric surgery are thiamine (also known as vitamin B1) deficient. Though important for metabolism, nerve conduction, and muscle contraction, thiamine is not produced by the body and must be derived from food sources. Thiamine deficiency has been associated with weakness, fatigue, psychosis, and nerve damage. While obesity is thought to be a disease of excess nutrition, this finding suggests that it may also be a disease of malnutrition. Advances in Nutrition, March 2015