Evidence supporting the use of: DHA (Docosahexaenoic Acid)
For the body system: Senses

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Synopsis

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

Docosahexaenoic Acid (DHA) is an omega-3 fatty acid that plays a critical role in the development and maintenance of the senses, particularly vision and cognitive function. Scientific validation for its use in supporting the "Senses" body system, especially eyesight, is substantial. DHA is a major structural fat in the retina of the eye, comprising up to 50% of the total fatty acids in the photoreceptor cells. Numerous studies demonstrate that adequate DHA is essential for normal visual development in infants and may help maintain visual function in adults. For example, research has shown that premature infants fed DHA-enriched formulas have better visual acuity than those without supplementation. In adults, some observational studies and randomized controlled trials suggest that higher dietary intake of DHA is associated with a lower risk of age-related macular degeneration, though evidence is mixed and not all studies show benefit. In addition, DHA's role in neural membranes supports the broader sensory system, contributing to cognitive functions such as learning and memory. Regulatory authorities like EFSA and the FDA recognize DHA's contribution to the maintenance of normal vision. Overall, while more research may clarify the precise benefits for sensory health in adults, the scientific basis for DHA's role in supporting the senses, especially vision, is well established.

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