system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does freshly squeezed juice from an orange taste different from the store bought "100% freshly squeezed" bottled orange juice?
gpt
Because "100% freshly squeezed" orange juice is a lie.

In reality, "not from concentrate" orange juice is stored in large tanks for as long as a year before it is shipped to stores. It is stored without oxygen so that it doesn't go bad. However, this also causes the orange juice to lose its flavor.

So, to make it taste like oranges again, companies hire flavor and fragrance companies to provide them with flavor packs which they then add back into the orange juice before shipping it to the store.

You won't find this listed in the ingredients because, technically, the flavors are made from orange essence and orange oils. However, they are heavily processed and it's a stretch to consider them natural. However, the phrase "100% natural" or "all natural" is not regulated in America the way that "organic" is, and it is all but meaningless. 

None of this is to suggest that "fresh squeezed" orange juice is any better or worse for you than orange juice from concentrate or actual fresh squeezed orange juice. But that's why it doesn't taste the same.