Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Dioscorea collettii and Dioscorea hypoglauca are species of yam used in traditional Chinese medicine (TCM), most notably under the names "bi xie" (D. hypoglauca) and "chuān shān yào" (D. collettii). Their primary historical use has been for the treatment of musculoskeletal conditions, edema, and certain urogenital complaints—particularly to dispel "wind-dampness" and relieve pain. In the context of TCM, these species are not typically categorized as herbs that directly support the Large Intestine or colon. However, they are sometimes included in multi-herb formulas intended for disorders that may involve the digestive tract, such as damp-heat diarrhea or dysentery, based on their properties of clearing dampness and heat. Scientific evidence directly connecting D. collettii or D. hypoglauca to large intestine (colon) health is limited. Some pharmacological studies have shown that extracts from these plants possess anti-inflammatory and immunomodulatory effects, which could theoretically impact colonic inflammation, but such effects have not been specifically validated in human gastrointestinal or colonic contexts. In summary, the use of Dioscorea collettii or hypoglauca for supporting the colon is rooted in traditional systems but lacks robust scientific validation. The evidence for their direct benefit to the Large Intestine is limited to traditional practice and indirect pharmacological effects, hence a moderate evidence rating.

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