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The principal natural form of zeaxanthin is (3R,3′R)-zeaxanthin. The macula mainly contains the (3R,3′R)- and meso-zeaxanthin forms, but it also contains much smaller amounts of the third (3S,3′S) form. [8] Evidence exists that a specific zeaxanthin-binding protein recruits circulating zeaxanthin and lutein for uptake within the macula. [9]
Meso-zeaxanthin (3R,3′S-zeaxanthin) is a xanthophyll carotenoid, and is one of the three stereoisomers of zeaxanthin. The meso- form is the second most abundant in nature, after 3R,3′R-zeaxanthin, which is produced by plants and algae. [ 1 ]
Lutein and zeaxanthin, two substances found in eggs, also play a key role in maintaining cellular health, especially of the eyes, skin, and hair. (A tip: Most of the vitamin D is found int the
“The egg yolks also contain choline, a much-needed nutrient for metabolism, nervous system and liver health, and antioxidants lutein and zeaxanthin, which are helpful for eye health,” she says.
Wright et al. (Feb 2011) found that, "The increase in zeaxanthin appears to surpass the decrease in violaxanthin in spinach" and commented that the discrepancy could be explained by "a synthesis of zeaxanthin from beta-carotene", however they noted further study is required to explore this hypothesis. [6]
Most people are familiar with the phrase “eat your vegetables” —and it’s good advice for many reasons. Yet, fewer than 10% of people get the 2.5-3.5 cups of vegetables needed daily to ...