Dr. Nuria Dianova, a nutritionist and executive director of the Center for Healthy Nutrition Research, reported that plant protein helps reduce the frequency and severity of heartburn in patients with gastroesophageal reflux disease.
The doctor points out that gastroesophageal reflux disease (GERD) is a chronic and recurring condition in which stomach and/or duodenal contents regularly flow back into the esophagus. If left untreated, without lifestyle modifications and dietary changes, GERD can progress to Barrett's esophagus (a precancerous condition), leading to decreased quality of life and psychological distress, while the effectiveness of medications diminishes over time.
She says: “The results of the assessment of the actual diet of these patients indicate a marked predominance of animal fats and proteins, as well as a lack of fiber. Observational studies indicate a significant reduction in the symptoms of gastroesophageal reflux disease when following a vegetarian or strict vegan diet. The results of the clinical trial conducted by the center’s experts, which included the inclusion of plant-based alternatives in the diet of patients with gastroesophageal reflux disease, and which was presented in November 2025 during a conference of nutritionists, indicate that patients reported a significant reduction in the symptoms of gastroesophageal reflux disease, such as the severity and frequency of heartburn, acidic sensation in the mouth, and other symptoms.”
According to the doctor, dietary fiber in plant-based diets affects the movement of the esophagus, reducing the sensitivity of reflux receptors and thus reducing the risk of damage to the mucous membrane.
She says: "The incidence of reflux, including acid reflux, is lower after meals containing plant protein compared to meals containing animal protein. The pH-impedance test is considered the gold standard for diagnosing gastroesophageal reflux disease (GERD). This is because it allows for the assessment of the frequency, duration, and type (liquid or gas) of reflux, as well as its effect on the esophageal mucosa over 24 hours. Plant protein also leads to faster gastric emptying compared to animal protein. Plant fats stimulate the hormone cholecystokinin (CCK) to a lesser degree, which reduces the strength of the lower esophageal sphincter, thus reducing the reflux of less stomach contents into the esophagus, which is the primary mechanism of reflux."
