nutritional disorders
Vitamin B6 Deficiency and Dependency
Key Points
Vitamin B6 deficiency is usually caused bypyridoxine-inactivating drugs (eg,isoniazid), protein-energy undernutrition, malabsorption, alcohol use disorder, or excessive loss. Deficiency can cause peripheral neuropathy, seborrheic dermatitis, glossitis, and cheilosis, and, in adults, confusion and seizures. Suspect and diagnose based on clinical findings. Correct secondary causes, or give supplementalpyridoxine. 