Lutein and zeaxanthin may be among the most evidence-backed carotenoids for longevity
They accumulate in the brain, where higher lutein levels are associated with greater crystallized intelligence (RCTs show that lutein and zeaxanthin supplementation can improve some measures of cognitive function)
Evidence also suggests they may slow progression to advanced macular degeneration in high-risk individuals
Kale is exceptionally high in lutein, and both carotenoids can also be obtained from certain multivitamins