Catjang cowpea (Vigna unguiculata subsp. cylindrica) is traditionally used in various cultures as a food source believed to support digestive health and benefit the stomach. In traditional African and Asian medicine, cowpeas, including catjang, are valued for their high fiber content, which can help regulate bowel movements and promote gastrointestinal health. Historical dietary records show that cowpeas have been a staple in diets for centuries, particularly in West Africa and parts of Asia, where they are consumed to maintain general well-being and digestive function.

However, the specific use of catjang cowpea for targeted "stomach" support is primarily based on its nutritional profile, such as the presence of soluble and insoluble fibers, rather than on direct evidence of efficacy for specific stomach ailments. There is limited scientific research directly examining the effects of catjang cowpea on the stomach or digestive system in humans. Most available data focus on general nutritional benefits, including protein, fiber, and micronutrient content, which can indirectly support digestive health. No robust clinical trials or scientific studies have demonstrated a direct, unique benefit of catjang cowpea for stomach disorders.

In summary, traditional use supports the inclusion of catjang cowpea in diets for general digestive health, but specific scientific validation for its effects on the stomach is lacking.