Fisetin for Joint Health
Fisetin is not a proven option for joint health: the only human trial in knee osteoarthritis found no benefit for pain, function, or cartilage, and the supportive evidence so far comes only from cell and animal studies.
Why this grade7-layer evidence engine
The grade reflects how thin the human evidence is. The single clinical trial in joint health—a double-blind, placebo-controlled study of 74 knee osteoarthritis patients using a 100 mg/day senolytic pulse protocol over a year (OARSI 2025, NCT04210986)—showed no significant improvement in pain, physical function, or cartilage on MRI versus placebo. Because it remains a conference abstract that has not been peer-reviewed, it carries no PubMed ID and cannot anchor a recommendation.
Everything pointing in fisetin's favor is preclinical. Cell and rodent studies report that it calms IL-1β-driven inflammation and cellular senescence through the SIRT1 and SIRT6 pathways and can slow cartilage breakdown in mice and rats (PMID 28213268, 38278314, 40189080, 37726323). These show biological plausibility only; none measured a human joint outcome, and laboratory signals routinely fail to translate to patients.
Authorities reinforce the caution. The US FDA issued a 2021 warning letter treating fisetin anti-inflammatory disease claims as unapproved drug claims, and Health Canada licenses fisetin (100 mg/day) for an antioxidant claim only—not for joints—while flagging interactions with anti-inflammatory and other medications. Major osteoarthritis guidelines (ACR, OARSI, AAOS) do not mention it at all. Exercise, strength training, and weight management remain the evidence-based foundations.
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 = 0.482
- 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