Piper chaba, commonly known as "chui jhal" or "long pepper," has been traditionally used in South and Southeast Asian herbal medicine systems, particularly in Ayurveda and traditional Thai medicine, for supporting digestive health, including alleviating gas and bloating. Historical texts and ethnobotanical surveys document its use as a carminative, a class of herbs believed to relieve flatulence and promote normal digestion. The fruits and roots of Piper chaba are often included in herbal formulations aimed at reducing abdominal discomfort, indigestion, and distention.

However, while traditional usage is well-documented, scientific research specifically validating its effectiveness for gas and bloating is limited. Some in vitro and animal studies suggest that extracts from Piper chaba possess antispasmodic, anti-inflammatory, and antimicrobial properties, which could theoretically support digestive health. Yet, there are very few clinical trials in humans directly measuring its efficacy for symptoms like gas or bloating. The available evidence is therefore mostly historical rather than robustly scientific.

In summary, the use of Piper chaba for gas and bloating is rooted in traditional medicine, with some preliminary pharmacological studies that provide a plausible basis for its effects, but conclusive scientific validation in humans is lacking.