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Originally Posted by blueash
The point is that there is no evidence that 5 servings a day and 1/2 hr of exercise does anything to "increase our immune systems" And certainly no evidence that taking supplements helps avoid COVID either.
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No evidence? Just like they could not prove smoking caused lung cancer for years. Find me a health organization that says that increased F and V diet doesn't improve your immune system.
Why don't you spend some time on the NIH website and find studies that indicate that that it doesn't help.
If you wan't to be exposed to the latest research.
Diet and Immune Function
Effect of fruit and vegetable consumption on immune function in older people: a randomized controlled trial. - PubMed - NCBI
In the process you may find out why our rates of death to heart disease and cancer are far higher in our elderly than much poorer countries. You can start by reading the China Study by Colin Campbell.
And many thanks to Darield for raising this issue that has unfortunately been under reported.