Lutein and zeaxanthin concentrations in plasma after dietary supplementation with egg yolk.
Handelman GJ, Nightingale ZD, Lichtenstein AH, Schaefer EJ, Blumberg JB. Lutein and zeaxanthin concentrations in plasma after dietary supplementation with egg yolk. Am J Clin Nutr. 1999 Aug; 70(2):247-51.