The secret is, when you go to a grocery store, avoid the center ailes, except for the one with canned veggies and beans and EVOO. Otherwise stick to meat, poultry and produce sections.
If you can obtain the latter three from local farms, or your back yard, even better.
And drink your water at room temperature. I'm Sirius.
Been doing that for years
Have a box of brown sugar in my pantry. Unopened for 10 years.