Ginger for Osteoarthritis
Ginger appears to produce a small, statistically real reduction in osteoarthritis pain, but the effect is clinically modest and not consistently confirmed, so it is at best a minor add-on rather than a proven treatment. Stomach upset is common, and no major arthritis guideline recommends it.
Why this grade7-layer evidence engine
A 2015 meta-analysis of five placebo-controlled trials (n=593, PMID 25300574) found ginger significantly lowered pain (SMD -0.30) and disability (SMD -0.22), but both effects are small, and patients taking ginger were more than twice as likely to quit treatment (RR 2.33), mostly from gastrointestinal upset. Two randomized trials (PMID 11710709; PMID 39212491) reported significant pain relief, but both were industry-funded, tempering their weight.
Critically, a 2020 PRISMA systematic review (PMID 32214292) measured an oral-ginger pain reduction of about 8 mm yet concluded the evidence is insufficient to support ginger over placebo; topical ginger and function outcomes showed no benefit. So the field itself does not regard the case as settled, which is why this lands at Tier B preliminary rather than higher.
Regulators and clinics reinforce caution. EFSA and the WHO treat ginger mainly as a food/anti-nausea agent with no approved osteoarthritis claim, and the NHS endorses it only for morning sickness. Mayo Clinic and the ACR/OARSI rheumatology guidelines do not mention ginger for arthritis at all, while Cleveland Clinic and Harvard note only a mild, diet-oriented possible benefit.
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 = 0.641
- tier_from_score — 依分數區間映射至 tier letter
- apply_hec_rules — 高品質 SR/MA 顯示 positive (1 篇 > 0 negative)
- tier_strict_requirement_check — Tier 條件達標，未降階
- detect_disputes — 偵測到 0 個 hard + 2 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status