Vitamins are essential components of nutrition. They are organic substances found in plants and animals. Vitamins can be classified as fat-soluble or water-soluble.
Fat-soluble vitamins can be stored in the body for later use. They include vitamin A, D, E, and K. Since they’re stored in the body there is a greater chance of reaching toxicity with fat-soluble vitamins.
Water-soluble vitamins can’t really be stored in the body so it’s good to consume them daily. They include all the B vitamins and vitamin C. B vitamins include B1, B2, B3, B5, B6, and B12. Biotin, choline, and folic acid are often thought of as part of the B vitamins. If you drink alcohol or coffee, take medications including birth control, or use tobacco then you may be decreasing the absorption of certain water soluble vitamins.