The objective of this paper is to examine the usefulness of plasmatic fructosamine finding as an indicator of glycemic control in patients with hypocaloric parenteral nutrition with glycerol. Thirty abdominal surgery patients were studied. None displayed malnutrition, diabetes mellitus, hepatopathy, nephropathy or hyperlipemia in the preoperative stage or during the five days of postoperative recovery they were administered hypocaloric parenteral nutrition with glycerol. Their plasma levels of glucose, fructosamine, triglycerides, albumin and total proteins were found in the preoperative stage and on the first and fourth day of postoperative recovery. Following surgery, findings showed an increase in triglycerides and a decrease in the protein compartment, while glycemia levels remained steady. Furthermore there was a positive correlation between the figures for glycemia and later fructosamine figures. The conclusion was that providing hypocaloric nutrition with glycerol does not increase fructosamine levels. This confirmed prior observations on the slightness of its effect on hydrocarbonic metabolisms.