According to the card, Jerusalem artichoke contains inulin – a prebiotic-type dietary fibre. How inulin works in the gut and why it is called a prebiotic, the card does not explain. The short description attributes benefit in diabetes and heart disease to the product, but gives no confirmation.
General information (not a manufacturer's instruction): the supplement is not a medicine; in case of diabetes and heart disease, use is discussed with a doctor.