Dr. Robert Loblay is Director of the Allergy Unit at the Royal Prince Alfred Hospital in Australia and co-author of the RPAH Elimination Diet Handbook. In this Expert Q&A, Dr. Loblay answers some basic questions on food intolerance to clear up common misconceptions.
No blood test can detect food intolerance. IgG/IgG4 ELISA tests claim to detect a form of food intolerance that doesn’t actually exist. Real food intolerance can always be detected with an elimination diet and food challenges.
Medical associations around the world warn against the use of IgG blood tests for a concocted version of food intolerance.