Sometimes you can't, though.
For example, those of us who eat meals prepared at military chow halls far, far away.
Fresh fruits and veggies are availalble most of the time (although, there were plenty of times in the earlier, rough days when they were not) and you make do with what you have.
I long ago stopped worrying about all of these food scares. Joe Jackson had a song in the 80s called "Everything Gives You Cancer." Pretty much sums it up.
Joe Jackson. The 80’2 had some great music.
I used to eat nothing but natural foods.
Until I found out most people die from natural causes.