Lactobacilli survival at dierent pH values is
important both at technological and physiological
levels. In the stomach, pH ranges from 1.5 to 2.0
under fasting conditions and from 8.0 to 9.0 in the
small intestine under satiety conditions. A similar pH
span can be found in fermented foods (from pH 2.0 in
vinegar to pH 8.0-9.0 in olives and some African and