营销话术证据 C · 证据有限
排毒清肠能清除体内积累的毒素
真相
肝（一相、二相代谢）和肾全天候在清除代谢废物；一篇综述（Klein & Kiat 2015）发现商业排毒没有严格的随机试验支持，短期掉重只是水分和肠内容物。
这话术为什么会流行
“毒素”故意说得含糊（从不指名），让说法无法被证伪、产品人人适用；果汁 / 清肠品牌则借“放纵后的愧疚”来推销。
机制速览
专门审查商业排毒饮食证据的一篇综述，结论很直接：临床证据非常少，而且据作者所知，还没有人做过检验商业排毒饮食效果的人体随机对照试验。少数几项声称看到了好处的研究，方法有缺陷、样本很小。营销里的毒素也几乎从不点名：清的是哪一种、清掉了多少，说不出来。
来源（2）
- Klein, A. V., & Kiat, H. (2015). Detox diets for toxin elimination and weight management: a critical review of the evidence. Journal of Human Nutrition and Dietetics, 28(6), 675-686. Very little clinical evidence supports detox diets: a handful of clinical studies reported enhanced liver detoxification or removal of persistent organic pollutants, but they were hampered by flawed methods and small samples; evidence for particular foods (coriander, nori, olestra) is preliminary and mostly from animals; and, verbatim, 'no randomised controlled trials have been conducted to assess the effectiveness of commercial detox diets in humans' (abstract, PMID 25522674).
- Guengerich, F. P. (2008). Cytochrome P450 and chemical toxicology. Chemical Research in Toxicology, 21(1), 70–83.