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Caffeine Allergy IgE Blood Test

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The Caffeine Allergy IgE Blood Test measures the IgE antibody levels in the blood to detect an allergy to caffeine.


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Test Code:


CPT Code(s):



Liquid chromatography/tandem mass spectrometry (LC/MS-MS)




No special preparation is required.

Test Results:

2-5 days. May take longer based on weather, holiday, or lab delays.  This test is currently delayed with no ETA. 

Walk-In Lab is prohibited from selling LabCorp tests to residents in the following states:NY, NJ, RI, MA, MD

What is the purpose of this test?

Order this Caffeine Allergy IgE Blood Test, which measures the IgE antibody levels in the blood to detect an allergy to caffeine. Many people rely on caffeine to feel more alert and energized, especially in the morning. However, it's crucial to consume it in moderation. While most individuals can safely have up to 400 milligrams of caffeine per day (equivalent to four 8-ounce cups of coffee), some may experience adverse effects if they consume too much. These effects can include restlessness, insomnia, headaches, and an abnormal heart rhythm. For those with a caffeine allergy, even a small amount of caffeine can severely impact their physical and mental health. It's important to be mindful of your caffeine intake and listen to your body's reactions.


When should I order a Caffeine Allergy IgE Blood Test?

Individuals may order this Caffeine Allergy Blood Test if they have experienced symptoms related to a caffeine allergy. Allergy symptoms vary depending on the individual, ranging from mild to severe reactions. Most food-related symptoms occur within two hours of ingestion but frequently begin within minutes. In addition, the response can be delayed by four to six hours or even longer in some rare cases.


An allergic reaction may affect the skin, intestinal lining, and air pathways. Individuals with a caffeine allergy may experience one or more of the following symptoms:


  • Tingling sensation near or around the mouth
  • Swelling
  • Abdominal discomfort
  • Nausea or vomiting
  • Diarrhea
  • Itching or hives
  • Congestion
  • Difficulty breathing, swallowing, or wheezing
  • Lightheadedness


In some cases, a severe, possibly life-threatening allergic reaction known as anaphylaxis may occur. An anaphylactic response requires immediate medical attention. Signs or symptoms of anaphylaxis may include:


  • Rapid or increased heart rate
  • Swollen throat or lump making it difficult to breathe
  • Low blood pressure
  • Extreme dizziness or loss of consciousness

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