In a case of food poisoning, someone has become ill due to eating a food that is contaminated with harmful bacteria or toxins. Contaminated food should not be eaten by anyone.
With a food allergy or intolerance, the offending food is safe to eat for the majority of people. However, it triggers an unhealthy reaction in some people. For example, peanuts are nutritious and tasty foods enjoyed by a great many people but for someone with a peanut allergy they can be very dangerous.
