D-甘露糖 D-Mannose × 下泌尿道症狀
Independent grade U (insufficient evidence / not addressed).
Independent grade U (insufficient evidence / not addressed). All five condition-specific layers (L2 PubMed, L5b Mayo Clinic, L5c Cleveland Clinic, L5d Harvard Health, L5e AUA / Urology Care Foundation) converge on the same finding: no RCT, no systematic review, no clinical practice guideline, no major medical authority, and no professional urology society has addressed D-Mannose as an intervention for non-infectious lower urinary tract symptoms (LUTS) such as frequency, urgency, nocturia, or overactive bladder. The mechanism of D-Mannose is FimH-mediated blockade of E. coli adhesion to uroepithelium, which is bacteria-specific and provides no biological rationale for non-infectious LUTS benefit. The largest available RCT (MERIT, JAMA Internal Medicine 2024, n=598) explicitly excluded overactive bladder patients and used UTI episodes — not LUTS — as the primary endpoint. The two LUTS-flavored signals (post-prolapse-surgery combination supplement, post-cystoscopy D-mannose plus S. boulardii) are confounded by combination formulations and post-procedural infection-prevention contexts. Because the evidence base is structurally absent rather than negative, the appropriate independent grade is U (needs more evidence), not D (evidence of no effect).
評分透明度
所有分數由 7 層證據引擎計算，過程公開可查▸查看完整決策路徑（audit trail）
- compute_raw_score — 加權公式: L2×0.30 + L3×0.25 + L5×0.25 + L11×0.10 + L1×0.10 = 0.455
- 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
台灣社群（PTT WomenTalk/e-shopping、Dcard 女孩板）對反覆泌尿道感染的私密保養討論熱烈，D-甘露糖常與蔓越莓、益生菌一起被討論。整體經驗分歧但傾向：認為甘露糖比單吃蔓越莓更有感，部分反覆發炎者吃了覺得復發減少；但也有不少人（含被引用的醫師發言）認為這類保養品只是輔助、無法治療急性發炎，真正關鍵仍是多喝水、不憋尿、注意衛生與性行為後排尿。多數人把它定位為『保養品概念』而非藥物。
分歧（甘露糖評價略優於蔓越莓，反覆發炎者多認為有輔助效果；但相當多人與被引用醫師認為僅保養、無法治療，真正關鍵是多喝水不憋尿）
- 社群幾乎未提及明顯副作用，多數用戶與被引用醫師表示『沒有壞處、要試也可以』
- 零星提到高劑量可能腹瀉/稀便（多源自衛教而非社群實測）
- 較常見的抱怨偏向『價格不便宜、效果因人而異/無感』而非身體不適
依論壇被提及頻率，非銷售或品質排序。
- 大研生醫 淨密樂/舒密樂（蔓越莓+甘露糖+益生菌，社群與業配最常出現）
- GNC 蔓越莓+甘露糖複合產品
- Now Foods D-Mannose（國外原裝、代購常見）
- Costco 蔓越莓產品
- 阿德比婦寶塞劑（已停代理，改法國代購，常被一併討論）
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