The type of “sick” you’d get from rancid oil is not prompt gastrointestinal suffering. Rancid - that is to say, oxidized - fats contribute to inflammation. Enough long-term consumption can damage the liver and other organs. You know how we’re all supposed to get plenty of anti-oxidant ingredients into our meals? I don’t mean to be harsh but frankly, I’d be more concerned about the lack of fiber and green vegetables in those two meals than the presence of outdated oil. Hopefully this is not typical of your son’s day-to-day food intake.
