https://www.americastestkitchen.com/cooksillustrated/how_tos...
It's exactly the same, except one uses celery. No, in fact, if I remember correctly, the nitrates used in the "uncured" process were even higher than the normal process.
You could simply measure the levels of nitrite before any exists and the end product might still have just as much.
The only candidate would be natural flavors, and I sort of doubt that they would get away with that.
That site lists “natural flavors” as an ingredient. I wonder if celery salt counts as a natural flavor in the UK.
This UK producer:
https://www.primalcut.co.uk/post/nitrate-free-bacon-bringing...
Contains the weasel words I pasted in below, which are verbatim what the US producers that use celery salt claim. Also, they don’t list the natural flavors. I’d bet they’re using celery salt, but that UK labeling laws don’t make them break it out as a separate ingredient:
> Primal Cut free-from naked bacon contains only fresh organic fruit sugars and nitrates present in the natural raw organic seasonings.
Sure, there's less protein in vegetables, so less chance of nitrosamines forming, unless you're eating a complete meal, in which case... figure it out.
Also, vegetables contain anti-oxidants and things which offset some of the nitrates, but this just seems like a reason to eat some vegetables with your cured meats.
[1] https://locavoredelivery.com/blog/some-facts-about-bacon-wit...