Alpha-gal syndrome surprises almost everyone who gets it. One day a burger is just dinner. A few months and one tick bite later, the same burger brings hives or a trip to the emergency room hours after the meal. If you or someone you cook for has been diagnosed, this guide walks through what is happening and how to build a full, delicious kitchen around it.

What is alpha-gal syndrome?

Alpha-gal syndrome, often called AGS, is a serious and potentially life-threatening allergy to alpha-gal, a sugar molecule found in most mammals. People with AGS react to red meat such as beef, pork, lamb, venison and rabbit, and sometimes to other products made from mammals, including dairy and gelatin.

The CDC describes AGS as both an allergy and a tickborne disease. In the United States the lone star tick is most often associated with it, and a few cases have been linked to blacklegged ticks. Most reported US cases are in southern, eastern and central states.

Key facts

  • More than 110,000 suspected cases of AGS were identified in the US between 2010 and 2022, and as many as 450,000 people may be affected (CDC).
  • Symptoms usually appear 2 to 6 hours after eating red meat or dairy, which is why the connection is easy to miss (CDC).
  • People with AGS might not react to every product containing alpha-gal, and reactions can differ from one exposure to the next, even with the same food (CDC).
  • Poultry and fish do not carry alpha-gal. A 2025 review notes that people with AGS can enjoy fish, turkey, chicken and other fowl.
  • Organ meats tend to carry more alpha-gal than muscle meat, and fattier cuts have been linked to stronger reactions in some patients (2025 review).

Symptoms and how it is diagnosed

The CDC lists hives or an itchy rash, nausea or vomiting, severe stomach pain, heartburn, diarrhea, cough or shortness of breath, a drop in blood pressure, swelling of the lips, throat, tongue or eyelids, dizziness, and anaphylaxis. Anaphylaxis is an emergency. If your doctor has prescribed epinephrine, use it, and still seek emergency care.

A healthcare provider diagnoses AGS with a physical exam, a detailed history and a blood test for antibodies to alpha-gal. Allergy skin tests to foods like pork and beef can help too. Because the reaction is delayed, a food and symptom diary is incredibly useful to bring to that appointment.

How food relates to alpha-gal syndrome

Avoiding alpha-gal is the core of managing AGS. That means removing mammal meat, and for many people dairy, gelatin and other mammal-derived ingredients too. Your allergist will tell you how strict you need to be, since some people tolerate dairy and others do not.

What stays on the menu is generous: chicken, turkey, duck, fish, shellfish, eggs, and every vegetable, fruit, nut and seed. Coconut milk and coconut cream stand in beautifully for dairy, and avocado oil or olive oil replace butter, lard and tallow.

Foods to build on

  • Chicken, turkey, duck and other poultry
  • Fish and shellfish
  • Eggs
  • Chicken or vegetable broth in place of beef or bone broth
  • Coconut milk, coconut cream and nut milks in place of dairy
  • Olive oil, avocado oil and coconut oil
  • Poultry sausage, turkey bacon and chicken chorizo (check the casing)
  • Every vegetable, fruit, nut, seed and herb

Foods to avoid

  • Beef, pork, lamb, venison, bison, goat, rabbit and other mammal meat
  • Organ meats such as liver, kidney and heart
  • Bacon, ham, salami, pepperoni, prosciutto and most sausages
  • Lard, tallow, beef or bone broth and beef stock
  • Gelatin and collagen from cows or pigs, including gummies and marshmallows
  • Milk, butter, cheese, cream and yogurt, if your allergist advises avoiding dairy
  • Carrageenan, which some people with AGS react to

Label reading and eating out

  • Read every label for gelatin, collagen, lard, tallow, beef or pork flavoring, and dairy. Gelatin shows up in candy, marshmallows and some yogurt and supplements.
  • Check casings. Chicken sausage is often stuffed into pork casing.
  • Ask about cooking fat at restaurants. Fries are sometimes cooked in beef tallow, and vegetables in butter or bacon fat.
  • Medications and supplements can contain mammal products, such as gelatin capsules. Ask your doctor or pharmacist to review them.
  • Prevent new tick bites. The CDC notes that preventing tick bites is the best protection against developing AGS.

How we label recipes on That Paleo Chick

A recipe earns our Alpha-Gal Friendly label only when no ingredient line contains mammal meat, organ meat, mammal fat or broth, gelatin, collagen, dairy, or chocolate that is not marked dairy-free. Unspecified protein powders are excluded too, since many are made from whey or beef. Poultry, seafood and plants pass. You will find the label in the "Fits these needs" panel on every recipe.

Our check reads ingredients, not product formulas. Always confirm packaged items such as broth, chocolate and sausage are free of mammal products.

FAQs

Can I eat chicken and fish with alpha-gal syndrome?

Yes. Birds and fish do not carry alpha-gal, so poultry, fish and seafood are generally safe.

Do I have to give up dairy?

Not everyone does. Some people with AGS react to dairy and others do not. Your allergist will guide you.

Why do symptoms show up so late?

Reactions usually begin 2 to 6 hours after eating, unlike most food allergies, which tends to hide the link to the meal.

Is alpha-gal syndrome an allergy or an intolerance?

It is a true allergy. The CDC describes it as a serious, potentially life-threatening allergy, so it calls for an emergency plan from your doctor, not just a diet change.

This guide is for general education and is not medical advice. Alpha-gal syndrome can cause severe reactions. Please work with your doctor or allergist on diagnosis, emergency planning and diet.

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