What Is the PH of the Stomach?


About states that the pH of the stomach is lowest in the morning before a person eats breakfast and highest after a person eats a meal high in protein. Lower pH values indicate that the fluid in the stomach is more acidic. A stomach acid test measures the acidity of an empty stomach, according to MedlinePlus, which advises that the normal result of this test is a pH between 1.5 and 3.5.