glutathione peroxidases in liver peroxidase role hepatic detoxification A Literature Review of Therapy Ameliorating Dysfunction in Non-Alcoholic Fatty Disease The Role of Oxidative Stress – Glutathione peroxidase - Wikipedia

For example, one study states that, Colorectal cancer is associated with oxidative stress, and assessment of oxidative stress...is important for the treatment and prevention of colorectal cancer. In another study of oral cancer risk, researchers found that low GSH levels, which are associated with increased oxidative stress were also linked with a greater chance of cancer

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Lets examine this issue in light of scientific data

Multiple studies in this and in other countries have found B12 deficiency in 10 percent to 24 percent of people 75 and older

They hadn't had patients who reported long-term symptoms, but said that if the symptoms occurred very quickly after vaccination, they could be related to allergic reactions or presyncope.April 27: Doctors suggested that patients with a history of immune-mediated thrombocytopenia, such as heparin-induced thrombocytopenia, should not get the Johnson and Johnson vaccine (mRNA vaccines like Pfizer and Moderna are ok)