Evidence supporting the use of: Natsudaidai
For the health condition: Belching

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Synopsis

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

Natsudaidai (Citrus natsudaidai), also known as Japanese summer orange, has a history of use in traditional Japanese and Chinese medicine for digestive complaints, including belching (eructation). The rationale for its use is primarily based on traditional beliefs that citrus fruits possess properties that can regulate "qi" (energy flow) in the digestive tract, promote appetite, and alleviate symptoms of indigestion such as bloating and belching. Traditional herbal formulas sometimes include citrus peels, which are thought to help move stagnant qi and relieve gastrointestinal discomfort. However, direct references to Natsudaidai specifically for belching are limited, and most evidence is anecdotal or derived from broader uses of citrus species in kampo (Japanese herbal medicine) or traditional Chinese medicine. Modern scientific studies on Natsudaidai and its effects on belching are scarce. Some research has explored the antioxidant and anti-inflammatory properties of Natsudaidai, but there is little direct clinical evidence evaluating its efficacy for belching specifically. Overall, its use is primarily sustained by traditional practice rather than robust scientific validation. The evidence supporting its use for belching is therefore modest and should be considered with caution, especially in the absence of high-quality clinical trials.

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