The use of peach (Prunus persica) for treating nausea and vomiting is primarily rooted in traditional medicine rather than supported by robust scientific evidence. In various East Asian practices, particularly Traditional Chinese Medicine (TCM), peach flowers, leaves, and sometimes seeds have been used for their purported benefits on digestive health, including relief of nausea, vomiting, and indigestion. These uses are documented in classical herbal texts, where peach is sometimes included in formulations aimed at soothing the stomach or harmonizing digestion.

However, the modern scientific literature does not provide strong validation for these uses. Few, if any, clinical studies have directly investigated the antiemetic (anti-nausea) properties of peach fruits or extracts in humans. Most research on peaches focuses on their antioxidant, anti-inflammatory, or general nutritive benefits rather than direct effects on gastrointestinal symptoms such as nausea and vomiting. Therefore, while there is a clear historical precedent for the use of peach in this context, the evidence remains anecdotal and based on traditional practices rather than scientific validation.

In summary, the support for using peach to treat nausea and vomiting is traditional, and the quality of evidence is low, meriting a rating of 1 on a 0-5 scale.