营销话术证据 A · 指南级
碱性水 / 碱性饮食中和体内酸
真相
血液 pH 被肺肾锁死在 7.35-7.45, 胃酸先把碱性水中和掉; Fenton 2016 (BMJ Open) 系统综述否定酸碱-防癌因果。
机制速览
人体血液的 pH 被维持在极窄的 7.35-7.45 之间，这不是建议范围，而是生存红线。一旦血液 pH 偏离到 7.0 以下或 7.7 以上，蛋白质和酶就会失活，是危及生命的急症。所以身体演化出三道极强的防线，把血 pH 死死锁住:
来源（2）
- Fenton, T. R., & Huang, T. (2016). Systematic review of the association between dietary acid load, alkaline water and cancer. BMJ Open, 6(6), e010438. Found no evidence supporting a causal link between dietary acid load or alkaline water and cancer.
- Hall, J. E., & Hall, M. E. (2020). Guyton and Hall Textbook of Medical Physiology (14th ed.): Acid-Base Regulation. Blood pH is held at 7.35-7.45 by the bicarbonate buffer, respiratory CO2 control, and renal handling of hydrogen and bicarbonate ions.