Subchronic toxicity study of corn silk with rats
2011
Wang, Cuina | Zhang, Tiehua | Liu, Jun | Lü Shuang, | Zhang, Cheng | Wang, Erlei | Wang, Zuozhao | Zhang, Yan | Liu, Jingbo
AIM OF THIS STUDY: Corn silk is a traditional herbal medicine in China, which has been used in many parts of the world for the treatment of edema as well as for cystitis, gout, kidney stones, nephritis, prostatitis and similar ailments. However, there is little scientific evidence about its safety. As a part of its safety assessment, a subchronic toxicity was performed in this paper. METHODS: The subchronic toxicity was investigated in male and female Wistar rats by dietary administration at concentrations of 0.5%, 2.0% and 8.0% (w/w) for 90 days. Overall health, body weight, food consumption, hematology, blood chemistry, organ weights, gross and microscopic appearance of tissues were compared between test and control groups. RESULTS: A number of significant differences were seen between groups, but none of them was considered to be adverse. Based on the present study, the no-observed-adverse-effect level (NOAEL) of corn silk is at least 8.0% which corresponds to a mean daily corn silk intake of approximately 9.354 and 10.308g/day/kg body weight for males and females, respectively. CONCLUSION: The results obtained in the present study suggest that consumption of corn silk has no adverse effects and support the safety of corn silk for humans.
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