It was observed that the administration of acerola to animals (mice) at a dose of 70 mg*kg−1 body weight significantly inhibited the increase in the level of proliferating nuclear cell antigen and ornithine decarboxylase activity at the stage of promoting tumor transformation (carcinogenesis), when the initiation of uncontrolled divisions, the volumetric growth of tumors and the development of a network of blood vessels in the tumor (angiogenesis) occur [57,58]. Here, PCNA is linked to neoplasm.