Allergy Research Group GlucoFit is a dietary supplement for support of healthy blood glucose levels and pancreatic health. GlucoFit is an herbal extract that has been processed by water extraction and standardized to 1% corosolic acid which is involved with carbohydrate and glucose metabolism. If your pancreas is unable to produce insulin properly or your body is unable to use the insulin produced, sugar will remain in your bloodstream. Corosolic acid helps the body metabolize glucose.