I worked in the meat business for 25 years they use it to prevent bacteria / longer shelf life / eye appeal it’s what prevents the cured meats from having that grey look , when used it retains the pink colour of meat . A lot of processors now use celery salt and others ingredients . I think if a person limits their intake your fine but if your diet is all processed meats and you drink alcohol excessively and smoke like a chimney that’s not good .
I think you have had health issues Wildcatter and in no way am I trying to be dis respectful please know that Natural is always best !.