泛酸（維生素 B5） Vitamin B5 (Pantothenic acid) × 痤瘡（青春痘）
結論：證據支持但有警示
證據基礎僅為單一小型（n=41）、產業資助的 RCT（Yang 2014，總病灶減少 p=0.
C 🟠 C 薄弱證據 附警語發布 🚨 high — heavy affiliate marketing in TW community
證據基礎僅為單一小型（n=41）、產業資助的 RCT（Yang 2014，總病灶減少 p=0.0436）加上 Leung 1997 的機轉假說，無複製、無統合分析，L1 Examine 亦無分級數據。
機轉（CoA／皮脂代謝）尚屬合理，故維持在 C（薄弱證據）而非 U；但僅一項高 COI、高劑量試驗無法支撐更高評級，且距離 B（需方向一致的多項小型 RCT）仍有明顯差距。
⚖️
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 0.41
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
91%
證據方向一致性高
證據層級
E7
單篇小型隨機對照試驗
▸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 = 0.415
- 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 + 1 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status
A Randomized, Double-Blind, Placebo-Controlled Study of a Pantothenic Acid-Based Dietary Supplement in Subjects with Mild to Moderate Facial Acne Vulgaris
結論：Mean total lesion count significantly decreased in treatment vs placebo arm at week 12 (p<0.05).
前往 PubMed
A pantothenic acid deficiency syndrome and acne vulgaris (pathogenesis hypothesis)
結論：Leung proposed that pantothenic acid deficiency impairs sebum metabolism, supplementation may reduce acne (hypothesis, not a controlled trial).
前往 PubMed
L4a US FDA
支持
CALCIUM PANTOTHENATE — CAS 137-08-6 — SCOGS no. 93 — 21 CFR 184.1212 — affirmed as Generally Recognized as Safe (GRAS) as a direct human food ingredient; used as a NUTRIENT SUPPLEMENT (including infant formula). 來源↗
L4b EU EFSA
支持
On the basis of the data presented, the Panel concludes that a cause and effect relationship has been established between the dietary intake of pantothenic acid and a normal energy-yielding metabolism, normal synthesis and metabolism of steroid hormones, vitamin D and some neurotransmitters, normal mental performance and the reduction of tiredness and fatigue. 來源↗
L4c UK NHS
謹慎
Pantothenic acid has several functions, such as helping our bodies release energy from food. Pantothenic acid is found in virtually all meat and vegetables... As pantothenic acid is found in a wide range of foods, it's unlikely that you'll not get enough of it. You should be able to get all the pantothenic acid you need by eating a varied and balanced diet. 來源↗
L4d TW TFDA / 衛福部
支持
泛酸之足夠攝取量(AI)成人為每日5.0毫克 來源↗
L4e WHO
未表態
— 本適應症無對應資料
L5a NIH Office of Dietary Supplements
支持
Because some pantothenic acid is present in almost all foods, deficiency is rare except in people with severe malnutrition. [...] The FNB was unable to establish ULs for pantothenic acid because there are no reports of pantothenic acid toxicity in humans at high intakes. [...] Pantothenic acid is not known to have any clinically relevant interactions with medications. 來源↗
L5b Mayo Clinic
未表態
— 本適應症無對應資料
L5c Cleveland Clinic
未表態
— 本適應症無對應資料
L5d Harvard Health
未表態
— 本適應症無對應資料
L5e Specialty Society (condition-mapped)
未表態
— 本適應症無對應資料
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 極高
低中高
📍立場總覽
台灣社群幾乎只討論『外用泛醇/B5 修護』而非『口服高劑量泛酸治痘』。PTT BeautySalon 與 Dcard 美妝對 B5 萬用修復霜的共識：適合修護屏障、淡痘印、退泛紅，但塗在活躍痘痘上多人反映悶痘、爆痘，建議改用 DUO+ 或就醫；口服高劑量 B5 治痘（Leung 巨量療法）在台幾無在地討論。
💬社群實感
無共識（外用 B5 修復霜被定位為『修護/淡痘印』而非『治痘』，部分人反映悶痘爆痘；口服高劑量泛酸治痘在台灣社群幾無實測討論）
破解迷思 社群最常見的 5 個誤解
✓
事實誤把外用泛醇（Panthenol，皮膚保養成分）與口服泛酸（Pantothenic Acid，營養補充劑）當成同一回事
✓
事實誤以為 B5 萬用修復霜能直接『消痘痘』（社群實測多為悶痘/爆痘，其角色是修護屏障與淡痘印）
✓
事實誤以為『B5 保濕修護』等同『抗痘治療』，忽略活躍痘痘應用 DUO+／A 酸／杜鵑花酸或就醫
✓
事實誤信國外流傳的『每日數克口服高劑量泛酸治痘』為主流療法（台灣在地幾無實測，亦無台灣皮膚科背書）
✓
事實誤以為水溶性維他命『吃多無害』，忽略短時間超量泛酸可能腹瀉、噁心
🩹 社群通報的副作用
- 外用厚敷活躍痘痘導致悶痘、粉刺、爆痘（多人於 BeautySalon 反映）
- 膚感偏油、悶（油性／痘痘肌反映）
- 口服短時間超量可能輕度腹瀉、噁心、頭痛（多引自衛教文而非在地實測）
🏷️ 社群熱議品牌
依論壇被提及頻率，非銷售或品質排序。
- 理膚寶水 La Roche-Posay B5 萬用修復霜／Cicaplast Baume B5（PTT/Dcard 最高曝光，但定位為修護而非治痘）
- 理膚寶水 DUO+（社群一致推薦取代 B5 用於活躍痘痘粉刺）
- CeraVe 適樂膚 含 Panthenol 修護產品（屏障修復脈絡下被提及）
- 達特醫 Dr.Hsieh 泛醇／杏仁酸系列（外用，業配多）
- NOW Foods／VitalBulk 泛酸鈣 500mg（iHerb 口服，曝光低、少人專為治痘服用）
⚠️ 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。
- 外用 A 酸（類視黃醇）
- 過氧化苯（BPO）
- 口服 isotretinoin（口服 A 酸）
查看 ClaimReview 結構化資料 (JSON-LD)
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