The Claim
β-carotene supplementation does not slow the progression of geographic atrophy toward the central macula and reduces the efficacy of lutein/zeaxanthin in slowing geographic atrophy progression, as observed in the AREDS and AREDS2 clinical trials.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Taking β-carotene supplements does not slow the worsening of geographic atrophy in the macula and is associated with reduced effectiveness of lutein and zeaxanthin in slowing this condition.
See the scientific wording
β-carotene supplementation does not slow geographic atrophy progression toward the central macula and may interfere with the beneficial effects of lutein/zeaxanthin, as demonstrated by the absence of effect in AREDS and reduced efficacy in AREDS2 when β-carotene was present.
When β-carotene is present, it takes up space in the central part of the eye that normally holds lutein and zeaxanthin, pushing these more effective antioxidants out. Without enough lutein and zeaxanthin, the cells at the center of the eye cannot neutralize harmful light-induced damage, so the tissue breaks down and spreads toward the center of vision.
What the research says
1 studyThe study found that taking β-carotene doesn’t help stop blind spots from spreading to the center of vision, and when taken with lutein and zeaxanthin, it makes those helpful nutrients work less well.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.