Many people think they have too much acid but in fact don’t have enough acid. Without enough stomach acid the
Lower Esophageal Sphincter (LES) tone may weaken or relax inappropriately allowing stomach acid to flow back into the esophagus.
Causes of low stomach acid include stress, aging, gastritis, poor diet, nutrient deficiencies - iron, zinc, B vitamins, smoking, alcohol, H. Pylori infection, acid blockers, stomach surgery.
In my case it’s autoimmune gastritis.