LymeHQ · Living With AGS

Alpha-gal food & safety

A tick bite can make your body react to mammalian products — often hours later, which makes the cause hard to spot. This is the practical guide: what contains alpha-gal, where it hides, and what to swap in.

If you are reacting now

Swelling of the face, lips, tongue or throat, or any difficulty breathing, is anaphylaxis. Use an epinephrine auto-injector if you have been prescribed one, then call emergency services — even if symptoms start to settle. Reactions can return after appearing to improve.
Review statePending clinical review

The hidden-source lists, the cross-reaction guidance, and the two specifics already carrying their own flag. A clinically-informed reviewer has not yet signed this off, and it stays marked until one does.

Alpha-gal syndrome is an acquired allergy to a sugar found in mammals, triggered by a tick bite. There is no medication that cures it — management is avoidance plus preparedness, and sensitivity varies enormously between people. Some react to trace amounts and to dairy; others do not. Treat everything below as a starting point for your own testing with an allergist, not a universal rule.

The Obvious Sources: Mammalian Meat

Meat from mammals contains alpha-gal. Poultry (chicken, turkey) and fish/seafood do not, and are generally safe for most people with AGS. 🥩 Avoid (mammalian meat)

🥩 Avoid (mammalian meat)

  • Beef (steak, burger)
  • Pork (bacon, ham, sausage)
  • Lamb
  • Goat
  • Venison & game
  • Rabbit
  • Organ meats
  • Bison
  • Chicken
  • Turkey
  • Fish
  • Shellfish
  • Eggs
  • Duck

The Hidden Sources (where people get caught)

This is what makes AGS so difficult — alpha-gal appears in countless products that don't look like meat. These are common culprits to check for. Sensitivity varies: some people react to traces, others tolerate them. 🧪 Mammal-derived ingredients to watch for on labels

🧪 Mammal-derived ingredients to watch for on labels

  • Gelatin (gummies, marshmallows, capsules, some yogurts)
  • Dairy (milk, butter, cheese, whey, casein)
  • Lard / tallow (frying, baked goods)
  • Beef/pork broth or stock
  • Rennet (in many cheeses)
  • Collagen (supplements, drinks)
  • Glycerin/glycerol (can be animal-derived)
  • Magnesium stearate (pills — can be animal-derived)
  • Stearic acid (can be animal-derived)
  • Carmine / natural flavors (verify source)
  • Suet / bone char
  • Some "natural flavors" (verify)
⚠ VERIFY — sensitivity varies; confirm specific products with manufacturer/allergist

Dairy Is Individual

Many people with AGS can tolerate dairy; others cannot — and dairy tolerance can change over time. Because milk contains small amounts of alpha-gal, some react to butter, cream, cheese, or ice cream. Track your own response and discuss with your allergist rather than assuming.

The Medication & Supplement Trap

One of the most dangerous blind spots — alpha-gal hides in pills, capsules, and some medical products, not just food. Common hidden sources in medications and supplements: Gelatin capsules (gel caps)

Common hidden sources in medications and supplements: Gelatin capsules (gel caps)

  • Gelatin capsules (gel caps)
  • Magnesium stearate (tablet filler)
  • Gelatin-coated pills
  • Glycerin in liquids/gels
  • Collagen/gelatin supplements
  • Some vaccines (gelatin-containing)
⚠ VERIFY with your pharmacist/provider before assuming any medication is safe

Tell Your Care Team — Important

Make sure every provider knows you have AGS. Certain medications, the cancer drug cetuximab (which cross-reacts with alpha-gal), some vaccines, and even certain surgical products (like some heparin or gelatin-based hemostatics) can pose risks. This matters especially before surgery, procedures, or new prescriptions. Add AGS to your allergy list everywhere.

Safe Swaps & What to Eat

AGS doesn't have to mean a narrow diet. Poultry, fish, eggs, and plant foods open up plenty of options. 🔄 Simple swaps

🔄 Simple swaps

Beef burger → turkey or chicken burger

  • Beef burger → turkey or chicken burger
  • Bacon → turkey bacon
  • Pork sausage → chicken sausage
  • Beef broth → chicken or veg broth
  • Gelatin → pectin or agar
  • Butter → olive/avocado oil or plant butter
  • Lard → vegetable oils
  • Gel caps → tablets or veg capsules

Dining Out & Travel

Tell staff you have a serious meat allergy — "alpha-gal" may not be understood, but "I'm allergic to all mammal products including beef, pork, and hidden ingredients" is clear. Ask what oil/fat is used for cooking and frying (lard, tallow, butter are common traps). Watch for shared fryers and grills, broths and sauces, and gelatin in desserts. Carry safe snacks when traveling, and know where the nearest care is in case of a reaction. If you're at risk of anaphylaxis, carry your prescribed emergency medication at all times.

Know the Signs of a Severe Reaction

AGS reactions can range from hives, stomach upset, and itching to full anaphylaxis (trouble breathing, throat tightening, swelling, drop in blood pressure). Because reactions are delayed, they can be severe and confusing. Anaphylaxis is a medical emergency — use your epinephrine if prescribed and call 911. Talk with your allergist about an emergency action plan.

There Is Hope

For some people, avoiding further tick bites allows alpha-gal sensitivity to decrease over months to years, and tolerance can improve. This varies widely and isn't guaranteed — but preventing new bites (see our prevention guide) is one of the most important things you can do for your long-term outlook.

Next Steps

Alpha-gal Syndrome is best managed with an allergist who can confirm your triggers, assess your severity, and build an emergency plan. If you suspect AGS after tick exposure and delayed reactions to meat, this is worth pursuing.

Next steps

Tell every clinician, dentist and pharmacist that you have AGS — before any procedure, prescription or vaccine, not after. Several medications and some medical products contain mammalian-derived ingredients, and the cancer drug cetuximab cross-reacts directly.
Avoiding further tick bites matters more here than almost anywhere else. Repeat bites can re-sensitise you, and some people's sensitivity decreases over time if they avoid them. Prevention guide
Find an Allergy-Aware ProviderTelehealth Network
🔍 The Lone Star tickHow AGS is testedEducation library