Only certain types of ketchup need to be refrigerated after opening
As you probably already know, tomato ketchup is made from, you guessed it, tomatoes. Of course, if other foods that shouldn’t be kept in the refrigerator are anything to go by, we now know that tomatoes shouldn’t be kept in the refrigerator. Apparently, the same goes for when they’ve been crushed into a delicious condiment.
One of the main reasons for this is because this product is full of preservatives that not only give it a long shelf life but also keep it fresh without needing to refrigerate it. However, if you buy low-fat or low-sugar ketchup, then you might need to store it in the fridge. Just make sure that you read the label.
