HEALTH
Tomatoes contain malic acid and citric acid, which cause your stomach to become excessively acidic. Consuming an excessive amount of tomatoes can result in heartburn or acid reflux due to excess gastric acid production in the stomach. Tomatoes may also aggravate GERD (gastroesophageal reflux disease) symptoms. The University of Maryland Medical Center recommends avoiding acidic foods such as tomatoes to avoid acid reflux symptoms.