Spinach is considered beneficial for eye health based on scientific evidence. It is rich in carotenoids, particularly lutein and zeaxanthin, which are known to accumulate in the retina, especially in the macula, and are believed to play a protective role against age-related macular degeneration (AMD) and cataracts. Multiple observational and interventional studies suggest that higher dietary intake of lutein and zeaxanthin is associated with a decreased risk of AMD and improvements in visual function. Spinach is also a good source of vitamin A (as beta-carotene), which is essential for normal vision, and vitamin C, which acts as an antioxidant and may further help prevent oxidative damage to eye tissues.

The Age-Related Eye Disease Study (AREDS2), sponsored by the National Eye Institute, found that supplementation with lutein and zeaxanthin reduced the risk of progression to advanced AMD in people at high risk. While spinach itself was not directly studied, its high content of these carotenoids makes it a recommended dietary source for supporting eye health. As scientific evidence supports the relationship between spinach’s nutrients and visual function, its use for supporting the eyes is justified by more than just tradition.

In summary, spinach’s role in supporting the eye body system is scientifically validated, with a moderate to strong evidence base, primarily due to its rich concentration of key carotenoids and antioxidants beneficial for ocular health.