Lemon Allergy Blood Test

This test measures the IgE antibody levels in a blood sample to detect an allergy to lemons. Lemons are fruits produced by the lemon tree, belonging to the Rutaceae (Citrus) family and with origins in Southeast Asia. Other fruits in the citrus family include oranges, grapefruit, kumquat, lime, and Sichuan peppers. Lemons are a popular fruit crop grown globally, with countries such as Mexico and India as leading producers. Lemons are rich in vitamin C, electrolytes, and antioxidants. Due to its many health benefits, lemons are an essential ingredient in many food products, including:

• Beverages (lemonade and juices)
• Frozen desserts
• Herbal teas
• Marinades, sauces, and dressings
• Certain seafood and meat dishes
• Alcoholic and non-alcoholic cocktails
• Candies and desserts (cheesecakes and cookies)

Lemons are also an ingredient in other products like toothpaste and certain cosmetics and perfumes.

A lemon allergy is uncommon; however, hypersensitive people who ingest lemons or lemon-based products may experience mild to moderate allergic symptoms. The key allergen in lemons is a lipid transfer protein (LTP) called Cit l 1. This allergen activates an unnecessary response in an individual's immune system. As a result, the body views this allergen as harmful and produces IgE antibodies to combat the invader. Unfortunately, these antibodies cause histamine to be released, which causes an allergic reaction.

An allergic reaction may range from mild or moderate to severe and vary for each individual. An individual may experience allergic reaction minutes to a few hours after exposure to an allergen. An individual allergic to lemons may experience the following symptoms:

• Tingling sensation in or around the mouth
• Swelling
• Abdominal pain
• Nausea or vomiting
• Diarrhea
• Itching, hives, or eczema
• Congestion
• Trouble breathing or wheezing
• Lightheadedness

An extreme, life-threatening allergic reaction known as an anaphylactic shock can occur in the most severe cases. An anaphylactic response requires immediate medical attention. Signs of an anaphylactic shock include:

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