The addition of FOS to a food prevents diarrhoea caused by the proliferation of dangerous bacteria in the intestine, while providing adequate nourishment to intestinal cells to facilitate regular regeneration.
Fructo-oligosaccharides (FOS) are fermentable fibres. They are not digested, but are nevertheless rapidly fermented by the bacteria in the colon, resulting in the release of small-sized fatty acids (known as volatile fatty acids) that :
Through fermentation, FOS are a direct source of nourishment for the cells of the large intestine. But they particularly promote the growth of specific bacterial flora (bifidus and lactobacillus) that have well-known benefits for the digestive tract :
FOS supplementation in the food of bitches used for breeding helps increase the antibody count (IgM) in the milk, which promotes better immunity for the puppies.
FOS are synthesised by a fungus (Aspergillus nigricans) in the presence of sugar, or sucrose, which is formedby the association of a glucose molecule and a fructose molecule. The fungus secretes an enzyme that permits the addition of extra fructose molecules to form FOS.