Methylglyoxal concentration in response to fructose delivery and media methylglyoxal. Liver cell methylglyoxal concentration in response to glucose (G) or glucose + fructose (GF) delivery in the absence or presence of insulin (A) or in response to varying media methylglyoxal concentrations (B). Data in graphs are the mean ± SDEV for 6 independent experiments performed in triplicate. Experiments were 4 h in duration. * significantly different from G (p < 0.05).