What is Alpha-Gal Syndrome?

Alpha-Gal Syndrome (AGS) is an allergic condition triggered by the bite of a Lone Star tick. It causes allergic reactions to galactose-alpha-1,3-galactose (alpha-gal), a sugar molecule found in most mammals. Symptoms typically appear 3-6 hours after eating red meat, pork, or lamb, and can range from hives to life-threatening anaphylaxis. According to the CDC, over 450,000 Americans may have developed AGS since 2010.

What foods should Alpha-Gal patients avoid?

Alpha-Gal patients must avoid all mammalian meat including beef, pork, lamb, venison, and bison. Many also react to mammalian by-products like gelatin (found in gummy vitamins and gel capsules), dairy products, and ingredients derived from mammals such as lard, tallow, and carrageenan. Safe alternatives include poultry (chicken, turkey, duck), fish, seafood, eggs, and all plant-based foods.

What medications are safe for Alpha-Gal Syndrome?

Many medications contain hidden mammalian ingredients. Gel capsules and softgels often contain bovine or porcine gelatin. Safe alternatives include tablets, caplets, liquids, and capsules made with vegetable-based HPMC. Always check inactive ingredients for gelatin, magnesium stearate (usually plant-derived in US), lactose, and stearic acid. VectorShield helps patients identify safe medication alternatives.

What are the 4 sensitivity levels of Alpha-Gal Syndrome?

Alpha-Gal sensitivity varies by patient: Level 1 (Mild, ~40%) - react only to mammalian meat; Level 2 (Moderate, ~30%) - also react to gelatin products; Level 3 (Significant, ~20%) - also react to dairy products; Level 4 (Severe, ~10%) - react to trace amounts and cross-contamination, sometimes called 'super reactors'. Sensitivity can change over time, especially with additional tick bites.

Can Alpha-Gal Syndrome be cured?

There is currently no cure for Alpha-Gal Syndrome, but many patients see improvement over time if they avoid additional tick bites. Some patients report tolerance returning after 1-5 years of strict avoidance and no new tick exposures. However, a single new tick bite can restart or worsen the condition. Management focuses on strict avoidance of trigger foods and carrying emergency medication like epinephrine.

Interactive assessment

What's your sensitivity level?

A short, two-minute questionnaire to help you think through your Alpha-Gal reactions and history. Educational only, and not a substitute for a diagnosis or advice from your healthcare provider.

Discover Your Sensitivity Level

Answer a few questions to understand your Alpha-Gal sensitivity level and get personalized recommendations.

What you'll learn:

• Your estimated sensitivity level (1-4)
• What foods and products to avoid
• Personalized safety recommendations

Important Disclaimer

This quiz provides an estimate based on your responses. It is not a medical diagnosis. Always work with your allergist to understand your specific condition.