At any moment, anywhere in the world, hundreds of people are diagnosed with cancer. In 2016, around 14 million people were diagnosed with cancer all over the world.These 14 million people were diagnosed with lung cancer (13%), breast cancer (11.5%) and colon cancer (9.7%). Women were diagnosed with breast cancer most of the time while men were diagnosed with lung cancer and prostate cancer.
The most common causes of mortality are lung cancer (19.4%) and liver cancer (9.7%). As seen in the rates, cancer mortality and incidence are increasing every year in the world. This brings with it various measures and treatments. Various methods are used for treatment according to types and stages of cancer like chemotherapy, radiotherapy, medicine, etc.
In order not to become cancer, measures are taken such as healthy life and nutrition. One of these measures is antioxidants. Antioxidants are a chemical substance that can be obtained by nutrition as we already have in our bodies.
The most important benefit of antioxidants comes from protecting our bodies against all the disturbances that can be caused by free radicals that threaten human health. Particularly effective in preventing cancer, heart and diabetes and infectious diseases. Antioxidants are a measure to avoid such ailments rather than a form of treatment. There are various antioxidants that are taken in the body and produced in the body.
Experimental studies support the role of reactive oxygen species in cancer, in part by showing that dietary antioxidants (eg, vitamin E, vitamin C, selenium, ?-carotene, and other phytochemicals) as well as endogenous antioxidants (eg, glutathione) that neutralize or trap reactive oxygen species act as cancer preventive agents. Antioxidants generally play a supporting role in the treatment of cancer. Antioxidants are generally used to oxidize free radicals in the body during chemotherapy and radiotherapy and make them harmless to the body. which is an indication that antioxidants are used for preventive and supportive purposes, not for therapeutic purposes. Consequently,(Borek C, Troll W.,1983) Antioxidants protect against oncogenic transformation by radiation and free radical–producing anticancer drugs.
Antioxidants do reduce the painful side effects of radiation and chemotherapy, thus supporting the beneficial effects of antioxidants in protecting normal cells during treatment in the treatment of certain cancers but does not provide a complete cancer treatment.(p.1304) .