Lutein for Age-related Macular Degeneration
For people who already have intermediate or advanced age-related macular degeneration, lutein (with zeaxanthin) can modestly slow progression to advanced disease, but it does not prevent AMD in healthy eyes, cannot reverse existing damage, and the evidence remains disputed across regulators.
Why this grade7-layer evidence engine
The grade sits at a cautious "Preliminary" tier because the evidence is unusually strong for a supplement yet genuinely mixed. The large AREDS2 trial (PMID 23644932, n=4,203) found no significant overall benefit (HR 0.90, P=.12); the clearer effect appeared only in the subgroup with the lowest dietary lutein intake (HR 0.74) and when lutein/zeaxanthin replaced beta-carotene (late-AMD HR 0.82, neovascular HR 0.78; PMID 24310343). A 10-year follow-up (PMID 35653117) confirmed this edge over beta-carotene (HR 0.85) without raising lung-cancer risk.
It is rated "disputed" because authorities disagree. A 2017 Cochrane review (PMID 28756618) judged standalone lutein/zeaxanthin to be low-certainty with little effect (RR 0.94, 95% CI 0.87-1.01). Regulators are split: the US FDA accepts lutein only as a safe food ingredient and rejected an AMD health claim, EFSA rejected all vision claims, and the UK NHS instructs prescribers not to start it and to stop existing prescriptions.
Clinical bodies, by contrast, are broadly supportive: Mayo Clinic, Cleveland Clinic, Harvard Health and ophthalmology society guidance endorse the AREDS2 formula for intermediate-to-advanced AMD. The honest reading is a conditional yes for slowing progression in that specific group, especially low-intake individuals, delivered as part of a multi-component formula rather than lutein alone, with no proven role in prevention or in healthy eyes.
Scoring transparency
All scores computed by a 7-layer evidence engine — fully auditable▸View the full decision path (audit trail)
- compute_raw_score — 加權公式: L2×0.30 + L3×0.25 + L5×0.25 + L11×0.10 + L1×0.10 = 0.695
- tier_from_score — 依分數區間映射至 tier letter
- apply_hec_rules — 無高階證據可裁決
- tier_strict_requirement_check — Tier 條件達標，未降階
- detect_disputes — 偵測到 1 個 hard + 0 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status