Figure 3: Apoptosis (%) of Walker 256 tumor cells from tumor-bearing rats fed a regular diet (W), supplemented orally with shark liver oil (WSL), exercised rats fed regular chow (EW), exercise and supplemented with shark liver oil (EWSL). Data are presented as mean ± SEM of 20, 21, 16 and 19 tumors per group to W, WSL, EW and EWSL, respectively.ap<0.05 vs. W; bp<0.05 vs. WSL.