Sweet potatoes can increase the secretion of stomach acid, and it is not recommended for those with gastroesophageal reflux disease (GERD) to consume sweet potatoes. GERD is a type of gastroesophageal reflux disease that refers to the damage to the esophageal mucosa caused by the reflux of acid or alkali. During an endoscopy, defects in the esophageal mucosa, or ulcers, can be observed. GERD is graded based on the size of these ulcers and the extent of erosion, with four levels of severity. The larger the damage, the higher the grade, indicating a more severe case of GERD. Therefore, those with GERD must be cautious about their diet. It is essential to quit smoking and drinking alcohol, avoid strong tea and coffee, and try not to consume foods that are rich, greasy, fried, spicy, or grilled. Foods like milk, soy milk, glutinous rice, and sweet potatoes, which can increase the secretion of stomach acid, are also not recommended. Thus, it is advised that people with GERD avoid consuming sweet potatoes.