ketchup

Reality continues to betray my understanding of the world.
Can it be left out or should it be stored in the fridge? People have big feelings about this topic, so we got some answers.
Ketchup, mustard, mayonnaise, vinegar ― they don't all need to be refrigerated. Here are the rules.
"Sometimes I like to live dangerously by putting ketchup on my kid’s dinner plate without asking where they would like it first."