Takahashi Mitsuko, Miyazawa Maki, Sakurai Katsumi, Watabe Kenjiro, Kojima Takashi
Yokohama City Institute of Health, Takigashira, Isogo-ku, Yokohama, Japan.
Shokuhin Eiseigaku Zasshi. 2009 Dec;50(6):297-303. doi: 10.3358/shokueishi.50.297.
Sennoside A and B were detected in 21 commercial health tea products surveyed in 2000-2007, but there were 8 products in which the leaves could not be identified as senna because the leaves had become discolored. The results of assay of sennoside levels and TLC chromatograms suggested that processed senna had been used in these products. Next, with reference to tea and health tea manufacturing methods, pharmaceutical senna was roasted or wet-processed experimentally. The results indicated that the discolored leaves contained in commercial health tea were most likely derived from senna leaves. Moreover, sennosides in medicinal doses were detected in some processed senna samples, and were determined to have a cathartic action in mice. Based on morphological confirmation and the results of component analysis, including sennoside, the discolored leaves found in commercial health teas were therefore determined to be senna leaves. There may be possible health risks, including diarrhea.
在2000年至2007年调查的21种市售保健茶产品中检测到番泻苷A和B，但有8种产品中的叶子无法鉴定为番泻叶，因为叶子已经变色。番泻苷含量测定结果和薄层色谱图表明，这些产品中使用的是经过加工的番泻叶。接下来，参照茶叶和保健茶的制造方法，对药用番泻叶进行了实验烘焙或湿法加工。结果表明，市售保健茶中含有的变色叶子很可能来源于番泻叶。此外，在一些加工过的番泻叶样品中检测到药用剂量的番泻苷，并确定其对小鼠有泻下作用。基于形态学确认以及包括番泻苷在内的成分分析结果，因此确定市售保健茶中发现的变色叶子为番泻叶。可能存在包括腹泻在内的健康风险。
