Figure 3. Histopathological sections, stained with methylene blue to identify crypts in the colonic tissues of F33 rats, and examined at 200×magnification. In group 1, we did not find formation of any aberrant crypt foci (ACF), while group 2 had the highest number of ACF; with groups 3-6 having significantly fewer crypts after dietary supplementation with different doses of Capsosiphon fulvescens (1 or 2%) or Hizikia fusiforme (2 and 6%), respectively. Arrows indicate ACF.
