維生素 B1（硫胺 / 硫胺素 / Thiamine） Vitamin B1 (Thiamine) × 神經病變
結論：證據支持但有警示
神經病變須拆成兩種截然不同的證據情境：(a) 缺乏型（酒精性、乾性腳氣病、Wernicke）——硫胺素補充為對因治療、機轉明確、FDA 核准注射劑與多國學會一致認定為治療基石，此情境屬 A/S 級；(b) 非缺乏型糖尿病周邊神經病變——僅見短期（3–6 週）、小樣本（n=24–165）、藥廠贊助之 benfotiamine RCT，BENDIP（Stracke 2008）僅 600mg/日 per-protocol 達顯著（p=0.
C 🟠 C 薄弱證據 附警語發布 ⚠️ medium — moderate promotional content
神經病變須拆成兩種截然不同的證據情境：(a) 缺乏型（酒精性、乾性腳氣病、Wernicke）——硫胺素補充為對因治療、機轉明確、FDA 核准注射劑與多國學會一致認定為治療基石，此情境屬 A/S 級；(b) 非缺乏型糖尿病周邊神經病變——僅見短期（3–6 週）、小樣本（n=24–165）、藥廠贊助之 benfotiamine RCT，BENDIP（Stracke 2008）僅 600mg/日 per-protocol 達顯著（p=0.033）而 ITT 不顯著，Examine 對該適應症僅評 surrogate（D），AAN 痛性糖尿病神經病變指引與 ADA Standards of Care 皆未納入，屬薄弱（C/D 邊界）。
整篇條目的爭議核心與商業驅動（benfotiamine 行銷）落在非缺乏情境，故整體調和判 C：機轉合理但非缺乏型人體證據不足；缺乏型為明確例外。
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評分透明度
所有分數由 7 層證據引擎計算，過程公開可查原始分數 0.50
D
C
B
A
S
← 反證據 / 無效有效 / 強證據 →
最終評級
C · 附警語發布
信心度
83%
證據方向一致性高
證據層級
E3
單篇高品質統合分析
▸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 = 0.502
- 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 + 1 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status
Benfotiamine in diabetic polyneuropathy (BENDIP): results of a randomised, double-blind, placebo-controlled clinical study
結論：NSC improved with benfotiamine vs placebo, statistically significant only in the per-protocol 600 mg/day group (p=0.033); effect dose-dependent but modest over 6 weeks.
前往 PubMed
Benfotiamine in the treatment of diabetic polyneuropathy--a three-week randomized, controlled pilot study (BEDIP Study)
結論：Significant improvement in NSS in benfotiamine group vs placebo (p=0.0287), mainly driven by pain reduction; small pilot, short duration.
前往 PubMed
A benfotiamine-vitamin B combination in treatment of diabetic polyneuropathy
結論：Improvement in nerve conduction velocity and vibration perception vs placebo; very small sample and combination formulation confound benfotiamine-specific effect.
前往 PubMed
Benfotiamine in treatment of alcoholic polyneuropathy: an 8-week randomized controlled study (BAP I Study)
結論：Thiamine repletion improved neuropathic symptoms and sensory function in thiamine-deficient alcoholic patients; benefit attributable to correcting deficiency rather than pharmacologic effect.
前往 PubMed
The multifaceted therapeutic potential of benfotiamine
結論：Short small RCTs suggest symptomatic benefit in diabetic neuropathy but trials are brief (3-6 weeks), small, industry-sponsored, and lack hard outcomes; evidence rated weak/inconclusive outside deficiency states.
前往 PubMed
L4a US FDA
支持
NUTRIENT SUPPLEMENT 來源↗
L4b EU EFSA
支持
a cause and effect relationship has been established between the dietary intake of thiamine and (a) contribution to normal energy-yielding metabolism, (b) contribution to normal neurological function, and (c) contribution to normal function of the heart. 來源↗
L4c UK NHS
謹慎
Thiamin (vitamin B1) helps: the body break down and release energy from food; keep the nervous system healthy. Adults aged 19 to 64 need about: 1mg a day of thiamin for men; 0.8mg a day of thiamin for women. You should be able to get all the thiamin you need from your daily diet. Thiamin cannot be stored in the body, so you need it in your diet every day. 來源↗
L4d TW TFDA / 衛福部
支持
維生素B1有助於維持能量正常代謝；維生素B1有助於維持皮膚、心臟及神經系統的正常功能；維生素B1有助於維持正常生長 來源↗
L4e WHO
支持
Thiamine hydrochloride. Injection: 100 mg/mL in 1‑mL ampoule. Tablet: 50 mg (hydrochloride). — listed under 'Vitamins and minerals', WHO Model List of Essential Medicines. 來源↗
L5a NIH Office of Dietary Supplements
支持
Because of the lack of reports of adverse effects from high thiamin intakes (50 mg/day or more) from food or supplements, the FNB did not establish ULs for thiamin. Thiamin deficiency can cause loss of weight and appetite, confusion, memory loss, muscle weakness, and heart problems. 來源↗
L5b Mayo Clinic
謹慎
Thiamine (vitamin B1) is used to prevent and treat thiamine deficiency syndromes including beriberi, Wernicke's encephalopathy syndrome, delirium, and peripheral neuritis. It's risky to take alpha-lipoic acid supplements if your body is low on vitamin B-1 (thiamin), as taking high doses might cause dangerous side effects such as seizures in people with a thiamin deficiency. 來源↗
L5c Cleveland Clinic
謹慎
Vitamin deficiencies, especially B vitamins like B1 (thiamine), B6, B9 (folate) and B12, can cause peripheral neuropathy. Beriberi, which happens because of a thiamine deficiency, can damage your nerves. 來源↗
L5d Harvard Health
未表態
— 本適應症無對應資料
L5e Specialty Society (condition-mapped)
謹慎
Treatment of the underlying cause (e.g., nutritional/vitamin deficiency, alcohol use) is the cornerstone of management for acquired polyneuropathies. No compelling evidence exists in support of glycemic or lifestyle management as therapies for neuropathic pain, which leaves only pharmaceutical interventions. 來源↗
PTT · Dcard · Mobile01 彙整自公開論壇討論，非統計抽樣，僅反映社群風向。
廣告 / 業配密度 中度
低中高
📍立場總覽
台灣社群對 B1（多以含活性B1誘導體的合利他命EX為代表）改善神經炎/手麻/腰痛反應分歧：部分人覺得有感、多數人認為治標或安慰劑，討論度高但非研究證據。
💬社群實感
分歧
破解迷思 社群最常見的 5 個誤解
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事實高劑量B群會傷肝（迷思，水溶性維生素過量多由尿排出）
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事實吃B群尿一定會變黃（其實是B2造成，合利他命EX不含B2故不黃）
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事實藥品級/活性B1誘導體一定比食品級B群有效（個體差異大，非定論）
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事實把神經病變單純當缺B1治療，忽略糖尿病等根本病因（治標不治本）
✓
事實緩釋/長效設計＝吸收效率一定更好
🩹 社群通報的副作用
- 睡前服用導致精神太好、睡不著
- （迷思性擔憂）高劑量傷肝、傷腎之傳聞
- 腸胃不適
🏷️ 社群熱議品牌
依論壇被提及頻率，非銷售或品質排序。
- 合利他命（合力他命）EX / EX PLUS / A25
- 克補
- 三多
- DHC維他命B群
⚠️ 列出僅代表「TW 社群討論度高」，不代表本站推薦或背書。本站不販售任何產品、無導購連結。
- 血糖控制（強化血糖管理）
- 神經痛藥物（gabapentinoids 與 SNRI）
- 三環抗憂鬱劑（如 amitriptyline）
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