Raman band intensities ratios for selected Raman bands corresponding to nucleic acids for six 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 24 h (labelled CCD-18 Co+tBuOOH, 24 h, red), group supplemented with vitamin C and tBuOOH for 24 h (labelled CCD-18 Co+Vit C+tBuOOH, 24 h, magenta), group supplemented with tBuOOH for 48 h (labelled CCD-18 Co + tBuOOH, 48 h, orange), group supplemented with vitamin C and tBuOOH for 48 h (labelled CCD-18 Co +Vit C + tBuOOH, 48 h, violet); the statistically significant results, based on ANOVA analysis, have been marked with asterix.