This invention relates to methods for lowering lipid levels in mammals using compounds that inhibit advanced glycation endproducts (AGEs), LR-9, LR-74 and LR-90. These compounds, which inhibit non-enzymatic protein glycation, also inhibit the formation of advanced lipoxidation endproducts (ALES) on target proteins by trapping intermediates in glycoxidation and lopoxidation and inhibiting oxidation reactions important in the formation of AGEs and ALEs.