Robin,

Science has yet to fix the daily dose of anti-oxidants, taken as anti-aging and health promotion ingredients. Too much  of these can adversely affect immunity, as our body cells use free radicals to kill pathogens. Some medicines for heart function also contain free radicals. How much of excessive free radicals produced and/or entering our body, depends quite a bit, on kind of food intake and methods of cooking.

"Too much of these can adversely affect immunity, as our body cells use free radicals to kill pathogens."

Thanks, I appreciate that various people state this to be the case.  I was just wondering if there is any justifiable evidence of it being true.  Can we be sure that there is not some way that the body can still generate free radicals even if you have a very high intake of antioxidants?  

Antioxidants from balanced consumption of whole, natural, organically grown foods contusing vitamins A and C and E , minerals such as zinc and selenium and phytochemicals, polyphenols (Flavonoids) is good for health. Consumption of antioxidants in the form of dietary supplements (particularly overdose) can have health risks.

http://whfoods.org/genpage.php?tname=george&dbid=143

Dear colleague

Antioxidants are naturally found in a number of foods and these cells can, to some extent, prevent free radicals from damaging your cells by neutralising them. These antioxidants can be found in vitamins A, C and E, in the minerals selenium, zinc and copper, and can also be found in phytochemicals from plants, fruits and vegetables.

Antioxidants minimise damage to your cells from oxidants (aka free radicals), and can help fight against ageing, cancer, and chronic diseases like cardiovascular disease. This has been proven by a study published in January 2008, which showed that taking antioxidant supplements like selenium could have ant-carcinogenic effects.

Antioxidants also don’t run the risk of getting damaged or turning into free radicals themselves when reacting with free radicals. 

so look at thins link to more information:

https://www.cbhs.com.au/news/2015/03/12/are-antioxidant-supplements-good-bad-or-completely-unnecessary-

Regards 

Thanks for your answers here.