Food supplement based on natural ingredients (MH Innovabuffer TM, sodium alginate and Opuntia ficus-indica (Chumbera or nopal)) in drinkable sticks, developed for optimal distribution over the esophageal mucosa. Gastroesophageal reflux is the most common digestive problem in Western countries. It involves the rise of part of the stomach contents into the esophagus, damaging its walls and causing the common sensation of heartburn. Reflux problems can be partially prevented with the use of antacids (they increase the pH of the stomach), although it should be noted that the cause of damage to the esophagus is not only acid (also pepsin, bile salts, etc.), and it is necessary to maintain an acidic pH in the stomach for proper digestive and protective function. For this reason, new approaches to gastroesophageal reflux involve direct protection of the esophagus without altering the physiological conditions of the stomach. Instructions for Use: Drink 1 stick after lunch and/or dinner. Do not dilute the contents of the sachet and avoid drinking or eating for 10 minutes after taking it.