Such is the case with In-N-Out, according to Redditors, where you'll also find a much less-popular ketchup brand: Red Gold. If you're not familiar with Red Gold ketchup, you might be familiar with ...

But the story of ketchup actually begins in Asia. We think of ketchup as a thick red sauce, but it was something pretty different in the beginning. It originated as a thin soy sauce made from ...

This story appears in the February 2019 issue of National Geographic magazine. Ketchup—that cheerful red sauce sold in handy glass bottles—first came on the American market in the 19th century.