UK-US Brexit trade deal ‘could fill supermarkets with cancer-risk bacon’

...The US processed meat industry uses nitrites derived from celery juice to cure pig meat, keep it pink and preserve it so it can stay on supermarket shelves longer. Nitrites are harmless in themselves, but when they are cooked and ingested, they produce nitrosamines which are carcinogenic...

https://www.theguardian.com/world/2021/feb/14/uk-us-brexit-trade-deal-could-fill-supermarkets-with-cancer-risk-bacon