The Study
Intakes of Lutein, Zeaxanthin, and Other Carotenoids and Age-Related Macular Degeneration During 2 Decades of Prospective Follow-up
This study watched a huge group of people for decades and noticed that those who ate more colorful fruits and veggies (like spinach and carrots) were less likely to get a serious eye problem later. But it didn’t make them change their diet — so we can’t say the veggies caused the protection, just that they went together.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
Scientists tracked what people ate for over 20 years to see if eating more orange, red, and green veggies helped prevent serious vision loss.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 552 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — this means eating more colorful fruits and vegetables may help prevent the most serious form of age-related blindness, especially if you're over 50.
- 2People who ate the most lutein/zeaxanthin (from spinach, kale, eggs) had 41% less advanced eye disease.
- 3Those who ate more α-carotene (from carrots) had 31% less.
- 4Eating a variety of carotenoid-rich foods cut risk by 35%.
- 5But these foods didn't stop early signs of eye disease.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
JAMA ophthalmology
Year
2015
Authors
Juan Wu, E. Cho, W. Willett, S. Sastry, D. Schaumberg
Related Content
Claims (6)
People who consume more lutein and zeaxanthin through their diet have a lower incidence of advanced age-related macular degeneration.
Adults aged 50 and older who consume more bioavailable lutein and zeaxanthin through their diet have a 41% lower incidence of advanced age-related macular degeneration over 20 to 26 years.
Adults aged 50 and older who consume more bioavailable α-carotene have a 31% lower risk of developing advanced age-related macular degeneration over 20 years, even when accounting for other carotenoids.
Adults aged 50 and older who consume more carotenoid-rich foods have a 35% lower risk of developing advanced age-related macular degeneration over 20 years compared to those who consume less.
Consuming carotenoids does not prevent the early signs of age-related macular degeneration, but may affect how the condition worsens over time.
People who eat foods rich in lutein and zeaxanthin have a lower risk of developing advanced age-related macular degeneration, even if they take β-carotene supplements.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.