Phytocyst is a food supplement based on the use of dried extract of the American Cranberry, Vaccimium macrocarpom, also known as Cranberry. The interest of this cranberry species lies in its high nutritional value: fibre, vitamins, minerals and proanthocyanidins. Of these, the most important active ingredient in cranberries is proanthocyanidins A (PAC-A). That is why the extract used in Phytocyst® is titrated 40% in this substance. This ensures a high supply of this substance. In addition to this premium extract, fructo-oligosaccharides, lactoferrin and vitamin C, which contributes to the normal functioning of the immune system, have been added.