Age-related macular degeneration (AMD) is a leading cause of vision loss in older adults. While carotenoids found in foods such as carrots have long been associated with eye health, researchers have also investigated compounds found in other vegetables for their potential effects on retinal cells.
A laboratory study published in the Proceedings of the National Academy of Sciences of the United States of America (July 13, 2004; 101(28):10446–10451) examined the effects of sulforaphane, a sulfur-containing compound found in broccoli, on human retinal cells.
In the study, cultured human retinal cells were divided into two groups. One group was treated with sulforaphane for 24 hours, while the other group received no treatment. Both groups were then exposed to ultraviolet (UV) light, to which retinal cells are particularly vulnerable.
Cells treated with sulforaphane demonstrated higher survival rates following UV exposure compared with untreated cells. The protective effect was dose-dependent, with higher concentrations of sulforaphane associated with greater cellular protection.
The authors concluded that sulforaphane activated cellular defense mechanisms that increased resistance to oxidative and UV-induced damage in retinal cells. While these findings were limited to laboratory conditions, they identified a potential pathway by which compounds found in cruciferous vegetables may influence retinal cell resilience.
