卡瓦胡椒 Kava × 焦慮
結論：台灣市場資訊黑箱
純療效面：兩篇 Cochrane MA 顯著支持（HAM-A WMD 5.
B 🟡 B 初步證據 台灣法規禁言 ✨ low — community discussion mostly non-commercial
純療效面：兩篇 Cochrane MA 顯著支持（HAM-A WMD 5.0 與 9.69）、Sarris 2013 陽性（d=0.63），確有真實抗焦慮訊號。
但最大、最長、政府資助的高品質 RCT（Sarris 2020, n=171, 16週）主要終點為陰性（p=0.25），2018 SR 也僅 7 試驗中 3 試驗有效，訊號明顯異質；Examine 的 Grade A 主要靠較舊較小的工業萃取（WS 1490）試驗撐起，效果量可能被膨脹。
獨立判讀為 B（初步證據、方向一致但被現代最佳試驗反駁），低於 Examine 的 A。
⚖️
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 0.73
D
C
B
A
S
← 反證據 / 無效有效 / 強證據 →
最終評級
B · 台灣法規禁言
信心度
81%
證據方向一致性高
證據層級
E1
Cochrane 高品質系統性回顧／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 = 0.726
- 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 — A 級條件未達 (需 E1-E3 + L5≥2 supportive + L4 無 against；實際 E1 / L5=1 / L4_against=0)
- detect_disputes — 偵測到 0 個 hard + 1 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status
Kava extract for treating anxiety (Cochrane Review)
結論：Meta-analysis of 6 trials (n=345) showed kava superior to placebo on HAM-A (WMD 5.0 points; p=0.01); adverse events mild/transient/infrequent.
前往 PubMed
Kava extract for treating anxiety (Cochrane Review, original)
結論：Seven double-blind RCTs; meta-analysis of 3 studies found significant effect favouring kava (WMD 9.69; 95% CI 3.54-15.83); concluded kava superior to placebo and relatively safe.
前往 PubMed
Kava for generalised anxiety disorder: A 16-week double-blind, randomised, placebo-controlled study
結論：NEGATIVE on primary endpoint: kava did not differ from placebo (relative reduction of 1.37 points favouring placebo; p=0.25); remission 17.4% kava vs 23.8% placebo (p=0.46). LFT abnormalities significantly more frequent with kava (no herb-induced hepatic injury).
前往 PubMed
Kava in the Treatment of Generalized Anxiety Disorder: A Double-Blind, Randomized, Placebo-Controlled Study (KAVA-01)
結論：POSITIVE: significant anxiety reduction favouring kava vs placebo (p=0.046), medium effect (Cohen's d=0.63); SLC6A1 GABA-transporter polymorphisms moderated response.
前往 PubMed
The effectiveness and safety of Kava Kava for treating anxiety symptoms: A systematic review and analysis of randomized clinical trials
結論：Kava effective vs placebo overall (RR 1.50, 95% CI 1.12-2.01) but effective in only 3 of 7 placebo-controlled trials; AEs same as placebo; hepatotoxicity risk flagged for use >8 weeks.
前往 PubMed
L4a US FDA
謹慎
Kava-containing products have been associated with liver-related injuries — including hepatitis, cirrhosis, and liver failure — in over 25 reports of adverse events in other countries. 來源↗
L4b EU EFSA
反對
The Medicines for Human Use (Kava-kava) (Prohibition) Order 2002... prohibits the sale, supply or importation of any medicinal product consisting of or containing Kava-kava. Following reports associating kava with cases of severe hepatotoxicity, Germany's BfArM revoked the marketing authorisations for kava-containing medicinal products in 2002. 來源↗
L4c UK NHS
反對
Subject to the provisions of this Order, no person shall sell, supply or import for the purpose of sale or supply any medicinal product that consists of or contains Kava-kava... 'Kava-kava' means any plant belonging to the species Piper methysticum. 來源↗
L4d TW TFDA / 衛福部
反對
台灣亦將卡瓦胡椒列為禁用之中藥成分(衛署中字)；卡瓦胡椒因具有潛在的嚴重肝毒性風險，目前在德國、瑞士、加拿大、英國等多國曾受到限制或禁止販售；美國 FDA 於 2002 年已發出消費者警告。 來源↗
L4e WHO
謹慎
Assessment of the risk of hepatotoxicity with kava products. [WHO, 2007] The objective of this assessment was to examine the safety of kava with a focus on the issue of hepatotoxicity, in view of reports of severe liver injury, including cases of liver failure requiring transplantation, associated with the consumption of kava-containing products. 來源↗
L5a NIH Office of Dietary Supplements
謹慎
Kava supplements may be helpful for anxiety, but they may need to be taken for several weeks to produce an effect. ... Various kava products have been linked to rare cases of liver injury, some of which have been serious or even fatal. 來源↗
L5b Mayo Clinic
謹慎
Some research suggests that kava might be helpful in treating anxiety. However, kava can cause severe liver damage. The Food and Drug Administration has issued warnings to consumers about the risk of severe liver damage from products that contain kava. 來源↗
L5c Cleveland Clinic
謹慎
Kava may help ease anxiety and promote relaxation. But there's a catch: It's been linked to serious liver damage, including liver failure. Talk to your doctor before trying kava, and don't use it if you have liver problems or drink alcohol. 來源↗
L5d Harvard Health
未表態
— 本適應症無對應資料
L5e Specialty Society (condition-mapped)
謹慎
Although kava is among the better-studied herbal remedies for anxiety, it has been associated with severe liver damage, including cases of liver failure requiring transplantation, and is not recommended for the treatment of anxiety. 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 低度
低中高
📍立場總覽
台灣社群（PTT/Dcard/Mobile01/痞客邦/FB社團）幾乎無卡瓦胡椒用於焦慮的真實使用討論。卡瓦在台灣禁列為食品或膳食補充劑，無合法市場，僅見零星電商濃縮醉椒販售與商業媒體科普文，缺乏鄉民實測心得。
💬社群實感
無共識（台灣社群幾乎無實測討論）
- 認知行為治療（CBT）
- 選擇性血清素回收抑制劑（SSRI）
- 規律運動
查看 ClaimReview 結構化資料 (JSON-LD)
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