What does uncured bacon actually mean?

You have probably read the sentence without quite reading it: uncured, followed in smaller type by something like no nitrates or nitrites added except those naturally occurring in celery powder.

That second clause is the whole answer, and it is doing more work than its size suggests.

What is actually happening

Celery is naturally high in nitrate. Add celery powder to meat with a bacterial culture, and the bacteria convert that nitrate into nitrite. The nitrite then does what nitrite does: fixes the pink colour and inhibits the bacteria that cause botulism.

The meat is cured. The curing agent arrived by a different route.

Why the label is allowed to say uncured

Because the rules are written about the added additive. Sodium nitrite is a listed additive with permitted uses and levels. If a manufacturer does not add it, they have not used it, whatever the celery is doing afterwards.

So “uncured” is a true statement about a regulatory category and a misleading one about the food, and both of those are the case at the same time. The required parenthetical about naturally occurring nitrates is the rule trying to close the gap, and it closes it only for a reader who already knows why celery powder is in there.

The useful thing to take away

Uncured is a statement about the source of the nitrite, not its absence.

If you are avoiding nitrite, uncured bacon does not achieve that. If you are avoiding synthetic additives as a preference, it does exactly what you wanted, and that is a legitimate reason to buy it.

Those are different goals and the label serves one of them. Sorting out which goal a phrase actually serves is the habit the guide on regulated words is built around.

One thing that is not different

The health association most people are thinking about, between processed meat and colorectal cancer, is an association with processed meat. It is not an association with the jar rather than the celery.

Choosing uncured does not move a product out of the category the research is about, and a page that implied otherwise would be doing the same trick the label does. If reducing processed meat is the goal, the aisle matters more than the wording, and for children that is a dietary conversation for a health visitor rather than a scanning decision, which is how the page for parents handles it.