Astaxanthin for Cardiovascular Disease
Astaxanthin shows modest, fairly consistent effects on a few blood-lipid markers (notably a small rise in HDL cholesterol and a drop in triglycerides), but no trial has tested whether it actually prevents heart attacks, strokes, or cardiovascular death. Treat it as preliminary support for surrogate markers only, not as a proven heart-protective supplement.
Why this grade7-layer evidence engine
This earns a preliminary (B) grade because every cardiovascular study to date measures surrogate markers rather than real clinical events. Meta-analyses are directionally favorable but small and low-certainty: a 2020 pooled analysis (PMID 32755613) found a significant but tiny HDL-C increase (+1.47 mg/dL) while blood pressure, LDL-C, total cholesterol, and triglycerides did not change, and a later lipid meta-analysis reported a modest HDL rise and triglyceride fall with GRADE certainty rated low to very low.
Individual trials are similarly thin. A small overweight-subject RCT (PMID 21964877, n=27) saw LDL-C and ApoB fall over 12 weeks, but a coronary-artery-disease trial found lipid improvements only within-group, with no significant difference versus placebo. No randomized trial is powered for MACE, myocardial infarction, stroke, or cardiovascular death, so the clinical payoff remains unknown.
Regulators and clinicians reinforce the caution. The FDA lists astaxanthin only as a color additive and authorizes no heart-health claim; EFSA rejected all related health claims for insufficient evidence; and no major cardiology body endorses it, with the AHA broadly not supporting antioxidant supplements for cardiovascular disease. There is also a documented warfarin-interaction concern, which matters for the medication-taking patients most interested in heart benefits.
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 = 0.588
- 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 0 個 hard + 0 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status