You may not eat bacon or processed food containing nitrates, but this response to a letter in Cook's magazine really caught my attention.
"The bottom line: All bacon is likely to contain nitrite and nitrate, whether added at the outset or formed naturally during processing. If you want to avoid these compounds, you'll have to avoid bacon - and any other processed meats containing celery juice - altogether."
Even when nitrites and nitrates aren't added, the celery juice which replaces it has "a high level of organic nitrate, which is converted to the problematic nitrite by the bacteria in the starter culture and also by saliva during chewing."
It sounds like avoiding bacon is the way to go. I believe many of you are vegetarians so it is a non-issue and yet it was another example to me of how complicated it is to be clear on what we ingest.