There’s growing awareness of rare, but potentially serious side effects from high doses of vitamin B6, a nutrient that’s become popular in a range of dietary supplements, electrolyte drinks and fortified foods. Vitamin B6, or pyridoxine, is a nutrient critical to many bodily functions, including nerve health, protein metabolism and blood sugar regulation. Because vitamin B6 is also vital to brain development, it’s important during pregnancy and infancy. It’s often promoted to help boost energy,