Evidence supporting the use of: Unsaturated Fat
For the body system: Eyes

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Synopsis

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

Unsaturated fats, particularly omega-3 polyunsaturated fatty acids (PUFAs) such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), have well-established roles in supporting eye health. Scientific studies indicate that DHA is a primary structural component of the retina, where it plays a key role in maintaining the integrity and function of photoreceptor cells. Clinical research has shown that people with higher dietary intake of omega-3 fatty acids have a reduced risk of developing age-related macular degeneration (AMD) and dry eye syndrome. For example, the Age-Related Eye Disease Study (AREDS) and other large observational studies have found associations between omega-3 intake and decreased progression of AMD. Additionally, randomized controlled trials have demonstrated that supplementation with omega-3s can alleviate symptoms of dry eye, likely due to their anti-inflammatory effects.

While the evidence for other unsaturated fats (such as monounsaturated fats) is less direct, they are also generally considered beneficial for overall vascular health, which indirectly supports ocular health. The scientific consensus supports the inclusion of unsaturated fats, especially omega-3 PUFAs, as part of a healthy diet to support the eyes and reduce risk factors for certain eye diseases. However, it should be noted that while the evidence is strong for omega-3s, not all unsaturated fats have the same level of evidence regarding eye health specifically.

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