I as an ibs sufferer had the temerity to ask my local supermarket manager( a national chain.......better not mention the name after the footballer experience) a polite simple q namely how safe are your salads. His response is unprintable in apublic forum. Needless to say I was escorted out the door.
Why pick on that supermarket ? I guess most of them get their stuff from the same source. Take a trip to one of the many farmers markets where you can buy local produce. No I can't be certain it's safe but no one is going to tell you their product is unsafe otherwise they would soon be out of business.!