The use of Terminalia species, particularly Terminalia chebula and Terminalia bellirica, for dyspepsia (indigestion) is primarily supported by traditional medicine systems such as Ayurveda and Unani. In these traditions, Terminalia fruits are key components of formulations like Triphala, which has been recommended for a variety of digestive complaints, including dyspepsia. Historical texts describe these fruits as having "deepana" (appetizer) and "pachana" (digestive) properties, suggesting their use to stimulate digestion and relieve symptoms like bloating, discomfort, and sluggish digestion.

Scientific research on Terminalia’s efficacy for dyspepsia is limited and primarily preclinical. Some in vitro and animal studies indicate possible gastroprotective, antioxidant, and mild prokinetic effects of Terminalia extracts. However, robust human clinical trials specifically targeting dyspepsia are lacking. A few small studies on Triphala (which contains Terminalia) suggest benefits for gastrointestinal motility and comfort but are insufficient for strong scientific validation.

In summary, Terminalia’s use for dyspepsia is well-documented in traditional medicine, and there is some preliminary pharmacological rationale, but high-quality clinical evidence is lacking. The evidence rating is therefore moderate based on historical use, but low from a scientific perspective.