peroxidase Article 7 Male 4 Peroxidase 4 human 4 male 4 metabolism 4 Adult 3 Female 3 Humans 3 Middle Aged 3 Western blotting 3 adult 3 controlled study 3 enzyme activity 3 female 3 middle aged 3 nonhuman 3 oxidative stress 3 protein expression 3 Aged 2 Antioxidants 2 aged 2 antioxidant 2 blood 2 chemical labeling 2 clinical article 2 comparative study 2 down regulation 2 enzyme linked immunosorbent assay 2