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Why does EyePromise contain only 4mg of lutein?

The decision to incorporate a 2:1 Zeaxanthin to lutein ratio in EyePromise is based on the actual ratio in the center of the macula. Lutein is more readily available than Zeaxanthin, in the diet. The eye still chooses to place a 2:1 ratio of Zeaxanthin to lutein in the center of the macula, the area with the highest concentration of visual cells.