* Alpha-Carotene, Cryptoxanthin, Zeaxanthin, Lutein, etc.
** Quercetin, etc.
References
1. Crayhon R. Robert Crayhon's Nutrition Made Simple. New York: M. Evans & Co., 1994.
2. Hendler SS. The Doctor's Vitamin and Mineral Encyclopedia. New York: Fireside, 1990.
3. Linder MC. Nutritional Biochemistry and Metabolism. 2nd ed. Norwalk, CN: Appleton & Lange, 1991.
4. Somer E. The Essential Guide to Vitamins and Minerals. 2nd ed. New York: HarperCollins, 1995.
5. Ziegler EE. Filer I.J. Present Knowledge in Nutrition. 7th ed. Wash DC: ILSI Press, 1996.