Vitamins are organic substances that sustain life by their actions within the body. Some convert foods to energy, build and repair cells, tissues and organs, and are cofactors for minerals. Fat soluble vitamins (A, D, E, K) are stored and used on demand. Water soluble vitamins (B1, B2, B3, B6, B12, pantothenic acid, folate, biotin, vitamin C) are not stored and need a daily intake. A good multi-vitamin provides the essential 13. Solo vitamins can be added if needed. As always, TyH offers the most bioavaiable forms for optimal nutrient activity.