Don't scoff at the idea of a food allergy. There are millions of people that have food allergies. Sometimes people have them since they were little, and other times they develop them when they get older. If you do not treat your food allergy, it can become very serious.
Actually, fatigue is a common symptom of a possible food allergy. You may not always break out when you eat a food you're allergic to - you may just feel tired all the time. Your body is trying to tell you that something is wrong. It's tapping into the energy in one part of the body to help the afflicted part - sort of like Scotty takes engine power to put up the shields on Star Trek.
If this occurs, it is a good idea to visit a doctor about this problem. The hospital will be glad to have an appointment fixed for you. It is not necessary to spend all day at the hospital, and this is something that could probably save your life. The hospital will perform a number of tests on you, and one amongst them is the food intolerance test.
A list of foods that is best to be avoided, can be given by a doctor, with the results of the food intolerance test. The list of foods for most people is very short, and hence does not require any drastic change in their food habits. However, for some people it could require a change in lifestyle. In any case, it is better to know the results.
Taking a food intolerance test can save you a lot of health problems and make sure that you lead a healthy and full life. It doesn't take very long, and you will reap so many benefits from knowing that your food is completely safe for you. If you think something you eat might be adversely affecting you, talk to your physician.