In food intolerance, the body does not form antibodies but reacts to a food with symptoms.
In fructose malabsorption, the absorption of fruit sugar (fructose) into the cells of the small intestine is reduced, which leads to complaints such as flatulence, diarrhoea, etc.
People with histamine intolerance are unable to break down endogenous histamine and histamine supplied through diet to a sufficient extent.
The lactose intolerance should not be confused with the immune reaction to cow's milk protein.
Gluten intolerance (also known as coeliac disease) is an autoimmune reaction to gluten, a constituent of various cereal grains.