A rich source of lutein and zeaxanthin in the American diet is the yolk of chicken eggs.

鸡蛋蛋黄是黄素和玉米黄质的主要来源在美国饮食结构中。

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Broccoli contains lutein and zeaxanthin (phytonutrient antioxidants in the carotenoid family).

西兰花中含有黄体素和玉米黄质（类胡萝卜素属中的一种植物营养素抗氧化剂）。

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Experiments have examined the epidemiology of lutein and zeaxanthin intake and AMD relationship.

流行病学实验已研究了叶黄素和玉米黄素摄入量与AMD的关系。

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Dr. Chew said the AREDS study researchers recommend replacing the beta-carotene in supplements with lutein and zeaxanthin.

WSJ: The Crucial Years for Protecting Your Eye Health

The study found a similar beneficial effect for people with cataracts who don't normally get a lot of lutein and zeaxanthin in their diet.

WSJ: The Crucial Years for Protecting Your Eye Health

The latest part of the study, which involved about 4, 000 participants, also looked at the effect of replacing beta-carotene in the supplements formulation with lutein and zeaxanthin because of studies that found former smokers who take beta-carotene have a higher incidence of lung cancer.

WSJ: The Crucial Years for Protecting Your Eye Health