Recent scientific studies have shown Vitamin D might prevent age-related macular degeneration, the leading cause of severe vision loss in people over age 50.

People with a family history of the disease, seniors, women, people with light-colored eyes, smokers, and people with cardiovascular disease are at higher risk for developing macular degeneration. Certain nutritional deficiencies have also been linked to a higher disease risk, while the antioxidant vitamins A, C, E, and zinc seem to help protect against it.

Studies have examined the relationship between blood levels of vitamin D and macular degeneration risk. In the third National Health and Nutrition Examination Survey (NHANES III), people with the highest blood levels of vitamin D were 36% less likely to have early macular degeneration than were people with the lowest levels; vitamin D status was not associated with the risk of more severe (advanced) macular degeneration.

People who drank milk had higher vitamin D levels and lower risk of early macular degeneration. Among people who drank less than one serving of milk per day, taking a vitamin D supplement also reduced the risk.

Based on this evidence, Pureye contains Vitamin D to complete its proprietary blend. Each Pureye capsule contains 800 ius of vitamin D.