Synopsis

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

Dioscorea nipponica, commonly known as Japanese yam, has a long history of use in traditional Chinese and East Asian medicine. In these traditions, it has been used to support digestive health and is sometimes cited for its potential to alleviate symptoms associated with ulcers, particularly gastric or peptic ulcers. The rationale for its use is largely based on its purported anti-inflammatory and soothing properties. Dioscorea species are believed to tonify the spleen and stomach, helping to regulate digestion and reduce gastrointestinal discomfort, which may indirectly benefit ulcer conditions.

However, scientific evidence specifically validating the use of Dioscorea nipponica for ulcer treatment is limited. While some laboratory and animal studies have demonstrated that extracts from Dioscorea species possess anti-inflammatory and antioxidant properties, there is a lack of robust clinical trials or direct research focusing on its efficacy for gastric or peptic ulcers in humans. Most of the contemporary support comes from traditional sources and a handful of preclinical studies. Therefore, although Dioscorea nipponica has a traditional basis for use in managing ulcers, the strength of the evidence is moderate at best, pending further scientific validation.

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