1. Bierer TL, Merchen NR, Erdman JW, Jr. Comparative absorption and transport of five common carotenoids in preruminant calves. J Nutr 1995;125:1569-1577.

2. Carughi A, Hooper FG. Plasma carotenoid concentrations before and after supplementation with a carotenoid mixture. Am J Clin Nutr 1994;59:896-899.

3. Gerster H. Anticarcinogenic effect of common carotenoids. Int J Vitam Nutr Res 1993;63:93-121.

4. Grando F, Olmedilla B, Blanco I, Rojas-Hidalgo E. Carotenoid composition in raw and cooked Spanish vegetables. Journal of Agricultural and Food Chemistry 1992;

5. Handelman GJ, Dratz EA, Reay CC, van Kuijk JG. Carotenoids in the human macula and whole retina. Invest Ophthalmol Vis Sci 1988;29:850-855.

6. Krinsky NI, Russett MD, Handelman GJ, Snodderly DM. Structural and geometrical isomers of carotenoids in human plasma. J Nutr 1990;120:1654-1662.

7. Levin LA. Ophthalmology. Those in the highest 20th percentile of dietary intake of carotenoids had a 43% lower risk of age- related macular degeneration. JAMA 1995;273:1703-1705.

8. Morris DL, Kritchevsky SB, Davis CE. Serum carotenoids and coronary heart disease: The Lipid Research Clinics Coronary Primary Prevention Trial and Follow- up Study. JAMA 1994;272:1439-1441.

9. Nishino H. Cancer chemoprevention by natural carotenoids and their related compounds. J Cell Biochem 1995;58 Suppl. 22:231-235.

10. Peng Y-M, Peng Y-S, Lin Y, Moon T, Roe DJ, Ritenbaugh C. Concentrations and plasma-tissue-diet relationships of carotenoids, retinoids, and tocopherols in humans. Nutr Cancer 1995;23:233-246.

11. Schalch W. Carotenoids in the retina--a review of their possible role in preventing or limiting damage caused by light and oxygen. EXS 1992;62:280-298.

12. Seddon JM, Ajani UA, Sperduto RD, et al. Dietary carotenoids, vitamins A, C, and E, and advanced age- related macular degeneration. Eye Disease Case-Control Study Group. JAMA 1994;272:1413-1420.

13. Sies H, Stahl W, Sundquist AR. Antioxidant functions of vitamins. Vitamins E and C, beta-carotene, and other carotenoids. Ann N Y Acad Sci 1992;669:7-20.

14. Street DA, Comstock GW, Salkeld RM, Schep W, Klag MJ. Serum antioxidants and myocardial infarction: Are low levels of carotenoids and ?-tocopherol risk factors for myocardial infarction. Circulation 1994;90:1154-1161.

15. Sundquist AR, Briviba K, Sies H. Singlet oxygen quenching by carotenoids. Methods Enzymol 1994;234:384-388.

16. Terao J. Antioxidant activity of beta-carotene-related carotenoids in solution. Lipids 1989;24:659-661.

17. Yong L-C, Forman MR, Beecher GR, et al. Relationship between dietary intake and plasma concentrations of carotenoids in premenopausal women: Application of the USDA-NCI carotenoid food-composition database. Am J Clin Nutr 1994;60:223-230.