Evidence supporting the use of: Dioscorea nipponica
For the body system: Circulatory System

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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 medicine (TCM) and other East Asian medical systems. It has been used to support the circulatory system, mainly in the context of promoting blood circulation and alleviating symptoms associated with blood stasis, such as pain and numbness. In traditional medicine, preparations from Dioscorea nipponica rhizomes have been prescribed for conditions like angina pectoris, rheumatic disorders, and hypertension. The primary active components identified in the plant are steroidal saponins, especially dioscin, which are believed to contribute to its pharmacological effects.

Scientific evidence for its efficacy in supporting the circulatory system is limited and mostly preclinical. Some animal and in vitro studies suggest that extracts from Dioscorea nipponica may exhibit anti-inflammatory, antithrombotic, and vasodilatory effects. For example, dioscin has been reported to have potential benefits in reducing blood pressure and inhibiting platelet aggregation. However, these findings are preliminary, and rigorous clinical trials in humans are lacking. Thus, the primary justification for its use in circulatory health remains traditional, with only modest evidence from modern research to support these applications.

Overall, while Dioscorea nipponica is traditionally used to support circulatory health, high-quality scientific validation is still insufficient, and its effectiveness for this purpose in humans has not been conclusively demonstrated.

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