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Serum antitransglutaminase, antigliadin, and antiendomysium antibodies

General instructions for Serum antitransglutaminase, antigliadin, and antiendomysium antibodies

Blood analysis to detect specific antibodies and diagnose celiac disease or gluten sensitivity.

  • Definition: Blood test to detect specific antibodies and diagnose celiac disease or gluten sensitivity.
  • Fasting: Generally, a fast from solid food and liquids for about 8 hours before the blood draw is recommended. Drinking plain water is totally allowed and highly recommended to keep you hydrated and facilitate the draw.
  • Medication: Some drugs that depress the immune system can alter the amount of antibodies in the blood. However, the decision to stop, maintain, or adjust your usual medication must always be discussed with your doctor.
  • Clothing and Accessories: We suggest coming with comfortable clothing, preferably short sleeves or with loose sleeves that can be easily rolled up above the elbow to facilitate access to the vein. There are no restrictions on the use of jewelry, piercings, or watches.
  • Specific Requirements: For the test to be accurate, you must be consuming gluten regularly. If you had already removed gluten from your diet, you will need to reintroduce it daily (for example, by consuming 1 or 2 slices of wheat bread a day) for at least 4 to 6 weeks before the analysis so that the antibodies become detectable again. This reintroduction process must always be done under medical supervision. It is not necessary to arrive with a full bladder or come accompanied.
  • Expected discomfort or pain from the test: You will feel a slight and brief prick at the moment of introducing the needle into the vein. After the draw, it is completely normal that a small hematoma (bruise) may form in the area or that you experience a very slight and passing dizziness.