Why does ketchup need to be refrigerated after opening, but the ketchup at restaurants is left out all day (maybe even longer)? - Quora
![Alannađź’ś on Twitter: "@AndreaMockSC just checked our ketchup and it does say refrigerate after opening https://t.co/0kkaZbPFkC" / Twitter Alannađź’ś on Twitter: "@AndreaMockSC just checked our ketchup and it does say refrigerate after opening https://t.co/0kkaZbPFkC" / Twitter](https://pbs.twimg.com/media/Dif3Kp1U0AYNfco.jpg:large)
Alannađź’ś on Twitter: "@AndreaMockSC just checked our ketchup and it does say refrigerate after opening https://t.co/0kkaZbPFkC" / Twitter
![In spite of what you may have read or heard, KETCHUP DOES NOT BELONG IN THE REFRIGERATOR!! (nor Hot Sauce) | ResetEra In spite of what you may have read or heard, KETCHUP DOES NOT BELONG IN THE REFRIGERATOR!! (nor Hot Sauce) | ResetEra](https://stupidevilbastard.com/wp-content/uploads/2017/02/ketchuplabel.png)
In spite of what you may have read or heard, KETCHUP DOES NOT BELONG IN THE REFRIGERATOR!! (nor Hot Sauce) | ResetEra
![Tyler C. Concealed Carry class 2/18/23 on Twitter: "The back of the bottle literally says “refrigerate after opening”, y'all can't follow directions and that's why the coronavirus gon keep spreading." / Twitter Tyler C. Concealed Carry class 2/18/23 on Twitter: "The back of the bottle literally says “refrigerate after opening”, y'all can't follow directions and that's why the coronavirus gon keep spreading." / Twitter](https://pbs.twimg.com/media/EUkDBftWkAEfGiR.jpg)
Tyler C. Concealed Carry class 2/18/23 on Twitter: "The back of the bottle literally says “refrigerate after opening”, y'all can't follow directions and that's why the coronavirus gon keep spreading." / Twitter
![Which? on Twitter: "@MarshaNJon Ketchup has vinegar in it, plus tomatoes are naturally acidic, so there's no need to store it in the fridge - despite what the bottle says. Although, if Which? on Twitter: "@MarshaNJon Ketchup has vinegar in it, plus tomatoes are naturally acidic, so there's no need to store it in the fridge - despite what the bottle says. Although, if](https://pbs.twimg.com/media/EStaWzLWAAIQJVo.jpg)
Which? on Twitter: "@MarshaNJon Ketchup has vinegar in it, plus tomatoes are naturally acidic, so there's no need to store it in the fridge - despite what the bottle says. Although, if
![In spite of what you may have read or heard, KETCHUP DOES NOT BELONG IN THE REFRIGERATOR!! (nor Hot Sauce) | ResetEra In spite of what you may have read or heard, KETCHUP DOES NOT BELONG IN THE REFRIGERATOR!! (nor Hot Sauce) | ResetEra](https://i.imgur.com/GZMvPgP.jpg)