not sure what in the soup. I used a boxed chickenbroth - few months past date - looked fine; chicken was fresh and boiled done and then shredded, I am thinking maybe the chopped ready prepared onions/celery/carrots may have been the issue. The nausea/vomiting was immediate after eating and did not stop till I had nothing left in my stomach. I am the only one; within 5 to 10 minutes of finishing eating. I was loading the dishwasher from cooking and suddenly had pain/nausea and vomited. I then continued to vomit until nothing left.