Evidence supporting the use of: DHA
For the body system: Eyes

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Synopsis

Source of validity: Scientific
Rating (out of 5): 4

DHA (docosahexaenoic acid) is an omega-3 fatty acid that plays a crucial role in eye health, particularly in the development and maintenance of the retina. Scientific evidence strongly supports DHA’s importance in the structure and function of photoreceptor cells in the retina. Numerous studies demonstrate that DHA is a major structural lipid in the retina, accounting for up to 50% of the total fatty acids in the photoreceptor outer segments. Research shows that adequate DHA intake during pregnancy and infancy is associated with improved visual acuity and retinal development in infants. Furthermore, observational studies suggest that higher dietary intake of DHA may be linked to a reduced risk of certain eye diseases, such as age-related macular degeneration (AMD). However, while some randomized controlled trials have investigated DHA supplementation for preventing or treating conditions like AMD and dry eye syndrome, results have been mixed, and not all studies show a clear benefit. Nevertheless, the biological plausibility, consistent epidemiological findings, and some interventional studies support the use of DHA for maintaining normal visual function and retinal health. Overall, DHA is recognized by scientific authorities (including the EFSA and NIH) as important for eye health, especially during early development.

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Products containing DHA

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