Synopsis

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

Dioscorea oppositifolia, commonly known as Chinese yam or nagaimo, has a long history of use in traditional Chinese medicine (TCM) for addressing symptoms related to deficient appetite. In TCM, Dioscorea oppositifolia (Shan Yao) is traditionally used to tonify the spleen and stomach, which are believed to be central to digestion and nutrient absorption. It is included in various classical herbal formulas intended to support those with poor appetite, fatigue, and digestive weakness, particularly when these symptoms are attributed to "spleen deficiency." Historical texts and modern TCM practice both cite Dioscorea oppositifolia as a supportive herb for promoting better appetite and digestive function, though the evidence remains largely anecdotal and rooted in tradition rather than modern clinical research.

Scientific studies on Dioscorea oppositifolia’s direct effects on appetite in humans are lacking. Some preclinical studies suggest it may have mild gastrointestinal protective and adaptogenic effects, but these do not directly validate its use for increasing appetite specifically. Overall, its reputation for supporting appetite is primarily based on traditional use and theoretical frameworks within TCM, rather than robust scientific validation. Thus, while Dioscorea oppositifolia is widely employed in traditional herbal medicine for appetite support, high-quality clinical evidence is limited.

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