Also exogenous addition of compounds such as vitamins (A, E, β-carotene), minerals (selenium, zinc), or proteins (transferrin, ceruloplasmin, albumin) can provide additional protection (Ostrovidov et al., 2000). These natural antioxidants or other compounds that can neutralize free radicals may be of central importance in the prevention of vascular diseases, some forms of cancer (Halliwell, 1997 and Nakayama et al., 1993) and oxidative stress responsible for DNA, protein and membrane damage.