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Vitamins are vital for keeping our immune system strong

Exposure to ionizing radiation is well known to promote oxygen radical formation within biological systems through radiolysis (interaction of radiation and water).12 Hypoxia or/and hyperoxia condition in cells has been noted to generate numerous oxygen-derived radicals.13 Besides, a couple of therapeutic drugs such as acetaminophen have been reported to cause oxidizing effects on cells, consequently leading to formation of oxygen radicals through the activity of drug metabolizing enzymes known as cytochrome P -450 system.14 5

Nutritional deficiencies: Strict vegetarians and vegans often qualify for B12 injections, as B12 is predominantly found in animal products

Torres Burtka, A

Enhancing cancer immunotherapy using antiangiogenics: Opportunities and challenges