Fruits are widely praised for their rich supply of vitamins, minerals and fibre, making them a staple in many healthy diets. Because of this reputation, many people believe that eating fruits first thing in the morning or after long hours of fasting is always a good idea. However, this is not always true for every fruit or every stomach.
Eating certain fruits on an empty stomach can irritate the digestive system, especially for people who struggle with acidity, gastritis or sensitive digestion. The stomach lining is more vulnerable when it has no other food to buffer acids and sugars, which may lead to discomfort.
Citrus fruits such as oranges, lemons and grapefruits are highly acidic due to their vitamin C content. When consumed on an empty stomach, they can irritate the stomach lining and trigger acid reflux, heartburn or nausea in some individuals..Read The Complete Original.