Pegfiber Powder is used to relieve constipation and contains ispaghula husk (a natural fibre) and polyethene glycol, which is not absorbed into the bloodstream in significant amounts. It generally does not affect blood sugar levels and is usually considered safe for people with diabetes. However, it is essential to check if the product contains any added sugars or sweeteners, especially in flavoured versions. Always consult your doctor or pharmacist before using this powder if you have diabetes to ensure it is appropriate for your individual health needs.