Cartigen Forte contains certain ingredients, especially glucosamine, which may cause your blood sugar levels to go up or change. While it’s not proven that it interacts with common diabetes medicines, it’s still important to be careful. You should talk to your doctor before you start taking it so they can decide if it’s safe for you. If your doctor allows you to use it, they will likely advise you to check your blood sugar more often to make sure it stays within a healthy range while you are on this supplement.