Vitamin B5 is a structural element of the enzyme Co-Enzyme A, which participates in metabolic reactions that release energy from food. Also, pantothenic acid participates in the production of antibodies and is therefore essential for a healthy immune system, as well as in the production of cortisol by the adrenal glands, the levels of which increase during periods of intense stress. For this reason, doctors often recommend taking 500mg of pantothenic acid by people who work and live in highly demanding conditions.