Why does orange juice need to be refrigerated but oranges don’t?

Question

A breakfast musing

In: 161

Answer 1

Oranges have a peel. Which acts as a protective barrier to keep out harmful bacteria.

Orange juice doesnt have that so it will quickly get bacteria in it that will start to multiply and make the juice go bad. Keeping it refrigerated slows down that process.

It’s essentially the same principle behind be able to leave unopened jars of mayo out but needed to refrigerate an open jar