Vitamin B6, or pyridoxine, is essential for the metabolism of carbohydrates, proteins, and fats. It helps to convert food into energy and increases energy production. It is also essential for red blood cell formation. Vitamin B6 deficiency can lead to depression, irritability, and fatigue. It has a beneficial effect on the skin condition, relieves pain and muscle cramps. In infants, pyridoxine deficiency can cause growth delay, weight loss, irritability, anemia, and seizures. Adults can suffer from drowsiness, loss of appetite, kidney stones, and stomatitis. This vitamin is useful for pregnant women as it relieves the symptoms of toxemia.