Vitamin B5, also known as pantothenic acid, is a water-soluble vitamin found in many foods like liver, nuts, eggs, and broccoli. It is a component of coenzyme A which participates in many metabolic pathways in the body, including energy production and synthesis of cholesterol, fatty acids, and neurotransmitters. Deficiency can cause tingling and burning sensations in the legs, muscle aches, fatigue, and anemia. Those at risk include people with chronic illnesses, heavy alcohol use, or very low calorie diets. Vitamin B5 supplements may help treat conditions like anemia, arthritis, fatigue, and wound healing.