Figure 1: Influence of homocysteine–induced products on the balance between oxidation and reduction states Homocysteine (Hcy) and its oxidized products are seen in normal human serum. Albumin with Cys34-SH (Albumin-SH) contributes to anti-oxidative stress reactions and is protective against Reactive oxygen species (ROS). This disulfide adducts of homocysteine control the whole body- balance between oxidation and reduction.