Raman band intensities ratios for selected Raman bands corresponding to proteins for 6 groups of normal human colon cells CCD-18 Co: control group (labeled CCD-18-Co, blue), group supplemented with vitamin C (labeled CCD-18 Co+Vit_C, turquoise), group supplemented with tBuOOH for 24h (labelled CCD-18 Co+tBuOOH, 24h, red), group supplemented with vitamin C and tBuOOH for 24h (labelled CCD-18 Co+Vit C+tBuOOH, 24h, magenta), group supplemented with tBuOOH for 48h (labelled CCD-18 Co+tBuOOH, 48h, orange), group. supplemented with vitamin C and tBuOOH for 48h (labelled CCD-18 Co +Vit C+tBuOOH, 48h, violet), the statistically significant results, based on ANOVA analysis, have been marked with asterix.