Ginkgo Biloba for Tinnitus
The best available evidence shows that ginkgo biloba does not meaningfully reduce tinnitus, and clinical guidelines specifically recommend against using it. If ringing in the ears is your main problem, ginkgo is not an effective treatment.
Why this grade7-layer evidence engine
Multiple high-quality reviews point the same way. A 2022 Cochrane review of 12 trials in 1,915 people found ginkgo has little to no effect on tinnitus severity (Tinnitus Handicap Inventory mean difference of just -1.35 points, rated very low certainty) (PMID 36383762). A 2018 systematic review reached the same conclusion, judging that ginkgo probably does not reduce tinnitus severity, intensity, or quality of life (PMID 30339143), and a 2004 randomized double-blind trial combined with a meta-analysis of 1,056 patients found no significant benefit (odds ratio 1.24, 95% CI 0.89-1.71) (PMID 15142066).
The single positive finding is a narrow exception rather than a counterargument. A 2018 meta-analysis reported a small benefit from the EGb 761 extract, but only in dementia patients who happened to also have tinnitus, not in people whose primary complaint is tinnitus, and the study was industry-funded by the extract's manufacturer (PMID 29942120). That result cannot be generalized to ordinary tinnitus.
Authorities agree. The American Academy of Otolaryngology-Head and Neck Surgery states clinicians should not recommend ginkgo or other dietary supplements for persistent, bothersome tinnitus, and the US NIH's NCCIH says there is no conclusive evidence ginkgo helps any health condition; the FDA and UK NHS likewise note insufficient evidence. Ginkgo also carries a real bleeding risk when combined with blood thinners or antiplatelet drugs, which matters for the older adults most affected by tinnitus. This consistent negative evidence and uniform regulatory stance support the counter-evidence grade.
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 = 0.291
- tier_from_score — 依分數區間映射至 tier letter
- apply_hec_rules — 高階證據未達主導 (0 positive vs 1 negative)，由 raw_score 決定
- tier_strict_requirement_check — Tier 條件達標，未降階
- detect_disputes — 偵測到 0 個 hard + 1 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status