Bee Propolis for Oral Health
Propolis mouthwash appears to reduce dental plaque and gum inflammation, often performing on par with chlorhexidine in short trials. But the evidence is preliminary: products are not standardized, studies are small and brief, and no major dental or regulatory body endorses it, so it is best viewed as an optional adjunct rather than a replacement for brushing, flossing, and professional care.
Why this grade7-layer evidence engine
This earns a B (Preliminary Evidence) because four systematic reviews and meta-analyses from 2020-2025 point the same way. A 2025 meta-analysis (PMID 41003407) found large reductions in plaque (SMD 1.74) and gingival index (SMD 2.19), and a 2021 meta-analysis (PMID 33578659) showed probing pocket depth fell by 0.67 mm versus placebo. Two systematic reviews (PMID 39863575, n=453; PMID 32650754, n=333) found propolis rinses roughly comparable to chlorhexidine, the clinical gold standard.
The grade stays preliminary rather than strong because the underlying quality is weak. Reviewers themselves note the evidence power is low with no agreed gold standard. Trials are small (often 20-60 people per arm), follow-up is very short (5-28 days against a 6-month benchmark), risk of bias is high in many studies, and propolis formulations vary widely (1-20%, alcohol-based or alcohol-free), so results cannot be generalized to any given product.
Authorities are unconvinced or silent. EFSA rejected all 13 propolis health claims because the ingredient is too variable to establish cause and effect, and the FDA has sent warning letters treating medicinal propolis claims as unapproved drugs. Cleveland Clinic is cautious, while the NHS, Mayo, Harvard, and the ADA have not endorsed it (no ADA Seal). Bee-product allergy is a real contraindication.
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 — 高品質 SR/MA 顯示 positive (2 篇 > 0 negative)
- 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