I am a 64-year-old male. For more than 20 years I had intermittent gastric problems that were obviously caused by something but I could not figure out what it was. Eventually I narrowed it down to potassium sorbate (E202).

After eating something with potassium sorbate in it, several hours (6-9) later I would get extreme flatulence and also belching for several hours. Usually also accompanied by loose stool. It would go away several hours later, after (I believe) the sorbate passed out of my system.

It was not an incapacitating problem, but it was extremely uncomfortable. I am very happy now that I can avoid it.

The main foods that were causing me trouble were fruit-flavored drinks. I am thankful that in the past couple of years there has been a tendency to produce products without preservatives - MP