Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Marigold, specifically referring to Calendula officinalis (pot marigold), has a history of traditional use for soothing eye irritation and inflammation, and there is some scientific evidence supporting its benefits for eye health. Calendula extracts contain flavonoids, carotenoids, and triterpenoids, which have demonstrated anti-inflammatory, antimicrobial, and antioxidant properties in laboratory studies. Several small clinical studies and animal models have investigated the use of calendula extracts in the treatment of conjunctivitis and other minor eye irritations, showing reductions in redness, swelling, and discomfort. Calendula-based eye drops or washes have been compared to standard pharmaceutical preparations, with some studies suggesting comparable efficacy in mild cases of conjunctivitis or allergic eye symptoms. However, these studies are generally small in scale, and high-quality, large randomized controlled trials are lacking.

Other types of marigold, such as Tagetes erecta (African marigold), are sources of lutein, a carotenoid important for eye health and often used in supplements to support vision and protect against age-related macular degeneration. Lutein is well-studied for its protective effects on the retina, though not specifically for treating acute redness or itching. Overall, the evidence for marigold's use in treating red or itching eyes is moderate, with both traditional and early scientific support, but more robust clinical trials are needed to confirm efficacy and safety.

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