Why does eating eggplant cause heartburn?

Heartburn after eating eggplant may be caused by consuming eggplant itself, or it may result from underlying medical conditions such as gastroesophageal reflux disease (GERD) or peptic ulcer disease.

1. Eggplant Consumption

Heartburn following eggplant intake may occur due to excessive consumption—large amounts of eggplant accumulating in the intestines can overwhelm normal digestive and absorptive capacity. Alternatively, heartburn may arise when eggplant is prepared with spicy or irritating seasonings, or when excessive oil is used during cooking, rendering the dish overly greasy.

2. Gastroesophageal Reflux Disease (GERD)

Heartburn may also indicate GERD. In affected individuals, gastric mucosal ulcers develop, prompting the stomach to secrete excess gastric acid during digestion. When this acid contacts the ulcerated surface, it may trigger excessive bile secretion, thereby causing heartburn—particularly after consuming raw eggplant.

3. Peptic Ulcer Disease

Peptic ulcer disease can likewise produce these symptoms. Typically, such ulcers result from incomplete or defective gastric mucosa, often accompanied by a whitish coating on the mucosal surface. Additional associated signs and symptoms may include edema, hyperemia (congestion), and mucosal erosion.