Once I learned that I cut out hot dogs and sandwich meat. I still eat other meat, which also isn't great, but processed meat seems like a big smoking gun.

https://www.cancercouncil.com.au/1in3cancers/lifestyle-choices-and-cancer/red-meat-processed-meat-and-cancer/#:~:text=Consuming%20too%20much%20red%20and,18%25%20of%20bowel%20cancer%20cases.&text=Processed%20meat%20is%20classified%20as,cause%20them%20to%20be%20carcinogenic.