How Long Does Food Poisoning Last in Adults?

In adults, many cases of food poisoning improve within one to three days, although the duration varies substantially according to the cause. Certain bacterial infections, parasites, and complications can produce symptoms lasting a week or longer. Adults may experience diarrhoea, vomiting, nausea, abdominal cramps, fever, and dehydration. Older adults and people with weakened immune systems can face a greater risk of serious complications. From a personal injury standpoint, a longer illness does not by itself prove negligence or establish a claim. The injured person generally needs evidence showing that contaminated food caused the illness and identifying the party legally responsible. Medical records, laboratory testing, receipts, leftover food, packaging, public health investigations, and reports of other customers becoming sick can all be relevant. Anyone experiencing severe dehydration, persistent vomiting, bloody diarrhoea, neurological symptoms, or prolonged illness should seek medical care rather than relying on a general timeline.