CAT and diabetes mellitus: The diabetes that continue for long‐term may impact the neurons present in the cerebral cortex and luteolin administration reverse this negative impact due to its ability to decrease lipid peroxidation level significantly which was observed to be accumulated excessively in rat brain during diabetic condition, and also minimizes the activities of Growth Stage 4 (GS4), superoxide dismutase, and catalase in the hippocampus of rats and cerebral cortex after luteolin administration.