What are the symptoms of food allergies? Are they always obvious?
closed as off topic by Matt Chan♦ Mar 8 '12 at 5:10
Questions on Physical Fitness Stack Exchange are expected to relate to physical fitness within the scope defined in the FAQ. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about closed questions here.
Generally you know after you go to doctor and have some allergy tests done. If those are negative you could be sensitive to some foods, however diagnosing sensitivities is to my knowledge pretty difficult.