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.

Free on iOS

Your Alpha-Gal safety companion.

Name: VectorShield
Author: HutchWare, LLC

Check medications for hidden mammalian ingredients, find safe restaurants with cooking-fat data, and connect with the AGS community -- all in one free app.

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377: Restaurants
8,400+: Menu items
27K+: Medications

Everything you need

Four tools for every angle of Alpha-Gal safety

No setup, no learning curve -- open the app and start checking.

Medication checker

Search 27K+ medications for mammalian-derived inactive ingredients before you take them.

Restaurant safety

377 restaurants rated with real cooking-fat data, safe menu items, and accommodation scores.

Food analyzer

On-device analysis classifies any food description for mammalian risk in real time.

Community

Share tips, rate restaurants, post recipes, and connect with other AGS patients.

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Real cooking-fat data, not guesswork.

377 restaurants are rated for how they cook -- beef tallow, lard, shared fryers -- with safe menu items called out and accommodation scores from the community. Search before you go, or find safe spots near you.

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Trade safe-product finds, restaurant reviews, and recipes with other people living with Alpha-Gal. The hard-won knowledge that used to be scattered across forums, in one place.

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Food analysis and risk calculations run locally on your iPhone. Your health data never leaves the device.

Sourced ingredient data

Medication ingredient data is compiled from official drug-labeling sources, bundled for offline lookup.

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iPhone: iOS 17.0 or later
Apple Watch: watchOS 10.0 or later
Storage: ~50 MB
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