鉀 Potassium × 肌肉痙攣／抽筋
The popular belief that potassium prevents or treats muscle cramps is not supported by the totality of the evidence, and the best available evidence actively points against it.
The popular belief that potassium prevents or treats muscle cramps is not supported by the totality of the evidence, and the best available evidence actively points against it. No randomized controlled trial has ever tested isolated potassium supplementation against muscle cramps; the single crossover trial (n=13) used a mixed carbohydrate-electrolyte beverage and failed to reduce cramp incidence. Observational data show no clinically meaningful difference in serum potassium between crampers and non-crampers, and multiple evidence-based reviews explicitly reject the electrolyte-depletion hypothesis in favor of neuromuscular fatigue as the leading mechanism for exercise-associated muscle cramps. Examine has no muscle-cramp outcome for potassium (L1 coverage gap), and clinical sources (Mayo, Cleveland Clinic, Harvard, AMSSM, ACSM) at most list low potassium as one possible deficiency-state cause among many while declining to recommend potassium supplementation for prevention or treatment. Because there is direct contradicting research (L2 stance = contradicts) rather than merely an absence of trials, grade D is more honest than U.
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 = 0.44
- 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
社群討論抽筋多半先想到鎂與鈣，鉀通常透過香蕉、蔬果或運動飲料攝取；普遍認為日常飲食補鉀比運動當下補救有效，鮮少有人單獨吃鉀補充劑。
無共識（討論抽筋時鉀多屬配角，社群普遍先聯想鎂/鈣，鉀偏向以香蕉、蔬果、運動飲料補充而非單獨補充劑）
- 高血鉀風險（網友提醒腎功能不佳或大量補鉀前應驗血鉀）
依論壇被提及頻率，非銷售或品質排序。
- 舒跑（運動飲料補電解質）
- 寶礦力水得（運動飲料補電解質）
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