A comparison of metformin versus guar in combination with sulphonylureas in the treatment of non insulin dependent diabetes.

: Twelve non-obese non insulin dependent diabetics whose mean +/- SE fasting blood glucose was 12.9 +/- 0.9 mmol/l despite maximal doses of sulphonylureas, received 8 weeks of guar (5 g tid before meals) and 8 weeks of metformin (0.5 g tid) following a six week washout period, in a cross-over design. Guar significantly lowered fasting cholesterol and triglyceride concentrations but did not alter glucose concentrations. Conversely, metformin significantly reduced fasting and post-prandial glucose concentrations but had no influence on plasma lipids.