I always have vinegar around, but that's for cleaning so I don't consider it food. Some people take daily apple cider vinegar though. I tried it for awhile and didn't see any difference and I can't stand the taste so i quit.
I always have: hummus, yogurt, and frozen pierogies!
I forgot vinegar. I cook with the mothers ACV and take it medicinally use it for detangler in kids hair. White vinegar I clean with and use in laundry and with baking soda as a drain cleaner.