Fasting ( midpoint and endpoint ) and postprandial blood at the endpoint following a test meal ( @ MJ , @g protein , @g carbohydrate and @g fat as PO ) were collected for the measurement of C-peptide , insulin , glucose , plasma glucose-dependent insulinotropic polypeptide and glucagon-like peptide-@ , lipids and apolipoproteins ; pre-specified primary and secondary outcomes were postprandial changes in C-peptide and plasma glucose .