B5, also known as pantothenic acid, is a water-soluble vitamin that is part of the B-vitamin complex. It plays a crucial role in the synthesis of coenzyme A, which is essential for fatty acid metabolism and the production of energy from carbohydrates, proteins, and fats. This vitamin is found in a variety of foods, including meat, eggs, whole grains, and legumes. A deficiency in pantothenic acid is rare but can lead to symptoms such as fatigue, irritability, and digestive issues. It is important for overall health and supports the body's ability to manage stress.