What is Acid Reflux? Causes Treatment Symptoms Acid reflux may seem common, but frequent heartburn could be a sign of Gastroesophageal Reflux Disease (GERD). If left untreated, it can lead to chest pain, esophageal inflammation, and even precancerous changes. Bilirubin metabolism: delving into the cellular and molecular mechanisms to predict complications The Egyptian Journal of Internal Medicine Springer Nature Link Glutathione and Side Effects: What You Need to Know for Better Health Performance Lab