Fig. 1

a The effect of ozonated krill oil on cell viability in RAW 264.7 macrophages. The viability and cytotoxicity of cells was assessed by MTT assay. The optical density of the formazan generated in the untreated cells was considered to represent 100% viability. The data is expressed as mean percentages of the viable cells versus the untreated cells. b Effect of ozonated krill oil on LPS-stimulated production of NO in RAW 264.7 macrophages. Cells were stimulated with LPS (1 μg/ml) in the presence of ozonated krill oil (10, 50, and 100 μg/mL) for 24 h at 37 °C. Culture media were collected in order to measure NO production using the Griess reaction. Values are expressed as means ± S.D. of triplicate experiments. ^*p < 0.05 indicates significant differences from the LPS-stimulated group