B complex vitamins assist the process your body uses to get or move energy from the food you eat. They do this by being cofactors (helpers) of enzymes whose job is to release energy from carbohydrates, fats, and proteins for transportation of oxygen and other energy-containing nutrients around the body. B vitamins are not stored by the body, so it requires daily replenishing through food or supplements. Vitamins B1, B2, B3, B4, B5, B6, folate, biotin; B12, choline and inositol are usually found in supplements that have multiple B vitamins or can be purchased individually, various symptoms of a lack of B vitamins could be: anemia, nerve problems, depression, sore tongue or mouth ulcers, muscle weakness, insomnia, and adrenal problems to name a few. Coenzymated B vitamins are still bound to amino acids for better absorption.