Alpha-Gal Syndrome

At Meyer Chiropractic, we've seen Alpha-Gal Syndrome become an increasingly common—and frequently underdiagnosed—condition in mid-Missouri. This resource was developed by Dr. Douglas Meyer based on his clinical experience and continuing education research to help patients, families, and clinicians understand the condition from tick bite to diagnosis to long-term management.

What Is Alpha-Gal Syndrome?

Alpha-Gal Syndrome (AGS) is a delayed allergic reaction that develops after a bite from the Lone Star tick. Unlike most food allergies, symptoms typically occur 3 to 8 hours after consuming mammalian meat or products—making the condition difficult to recognize and easy to misdiagnose [1][3].

Because symptoms often occur several hours after a meal—sometimes overnight—many people never connect their symptoms to something they ate earlier in the day. This delayed timing is one of the reasons Alpha-Gal Syndrome is frequently overlooked or mistaken for other medical conditions.

The allergy develops against a sugar molecule called galactose-α-1,3-galactose (alpha-gal), found in all non-primate mammals. When the immune system learns to attack this sugar after a tick bite, future exposure through food triggers an allergic response [1].

Common Triggers

The following foods and ingredients contain alpha-gal and may trigger reactions. This list is not exhaustive [2]:

  • beef

  • pork

  • venison

  • lamb

  • gelatin

  • milk and some dairy products

  • beef broth

  • lard

  • tallow

  • pork casings

  • other mammalian-derived ingredients

Not everyone with Alpha-Gal Syndrome reacts to the same foods or ingredients. Some people react only to red meat, while others may also react to dairy products, gelatin, certain medications, or other mammalian-derived ingredients. The severity and type of reactions can also vary from person to person.

Note: Alpha-gal also appears in less obvious places—certain medications, supplements, and personal care products. See our Living with Alpha-Gal page for a full guide to hidden sources.

Why Is Alpha-Gal Syndrome Important?

Many people live with symptoms for months or even years before receiving a diagnosis because reactions are delayed rather than immediate [3]. The connection between a meal and symptoms that appear hours later is not intuitive, and most conventional allergy panels don't include alpha-gal testing by default [3].

Alpha-Gal Syndrome is frequently mistaken for:

  • food poisoning

  • irritable bowel syndrome (IBS)

  • chronic digestive issues

  • unexplained hives

  • anxiety or panic attacks

  • idiopathic (unknown cause) allergic reactions [3]

Recognizing the pattern between tick exposure and delayed symptoms is the key to proper diagnosis and management.

What Makes Alpha-Gal Syndrome Unique?

It is the only known food allergy triggered by a tick bite. It is triggered by a carbohydrate (sugar) rather than a protein — which is how most food allergies work. Symptoms are typically delayed 3–8 hours after eating, not immediate. Reactions range from mild itching to life-threatening anaphylaxis [1][4].

How the Allergy Develops

  1. Lone Star tick bite occurs.

  2. Immune system is exposed to alpha-gal in the tick's saliva.

  3. Body produces IgE antibodies against alpha-gal.

  4. Patient later eats red meat, dairy, or mammalian-derived products.

  5. Immune system recognizes alpha-gal and triggers an allergic reaction—hours later [1].

Who Is at Risk?

Anyone who spends time outdoors in tick-prone areas can develop Alpha-Gal Syndrome after a bite [1][6]. In mid-Missouri, this includes a large portion of our patient population.

Higher-risk groups include:

  • hunters

  • fishermen

  • farmers

  • landscapers

  • hikers

  • campers

  • gardeners

  • pet owners

  • outdoor workers of any kind.

Symptom Presentation

Symptoms vary widely from patient to patient and may involve multiple body systems simultaneously. This is part of what makes AGS so difficult to recognize [4][5].

Skin: itching, hives, swelling, flushing, rash (including at tick bite site)

Gastrointestinal: abdominal cramping, nausea, vomiting, diarrhea, heartburn, bloating, indigestion

Respiratory: throat tightness, itchy throat, tongue swelling, hoarseness, runny nose, shortness of breath, cough

Cardiovascular: palpitations, low blood pressure (hypotension), chest pain, rapid heart rate (tachycardia), syncope (fainting)

Neurological: dizziness, lightheadedness, confusion, weakness, headache

A key feature of Alpha-Gal Syndrome is that these symptoms are often delayed, typically occurring 3–8 hours after eating mammalian products, which can make the connection to food intake difficult to recognize.

⚠️ Emergency Warning: Anaphylaxis

Up to 60% of individuals with Alpha-Gal Syndrome may experience anaphylaxis — a severe, potentially life-threatening allergic reaction requiring emergency care [5].

Signs of anaphylaxis include difficulty breathing, throat swelling, severe dizziness, low blood pressure, and loss of consciousness.

If these symptoms occur, call 911 immediately and use epinephrine (EpiPen®) if prescribed. Patients diagnosed with Alpha-Gal Syndrome should discuss carrying an epinephrine auto-injector with their healthcare provider.

Preventing Tick Bites

When spending time outdoors [6]:

  • wear long sleeves and long pants

  • tuck pants into socks

  • use EPA-approved repellents containing DEET or picaridin

  • wear permethrin-treated clothing when appropriate

  • perform a full-body tick check after any outdoor activity.

Safe Tick Removal

If you find an attached tick, proper removal matters. Do not use heat, petroleum jelly, or folk remedies [7].

  1. Use fine-tipped tweezers.

  2. Grasp the tick as close to the skin's surface as possible.

  3. Pull upward with steady, even pressure — do not twist or jerk.

  4. Clean the bite area with soap and water or rubbing alcohol.

  5. Store the tick in a sealed bag if identification may be needed later.

Think You May Have Alpha-Gal Syndrome?

If you're experiencing delayed allergic reactions after eating red meat or mammalian products, especially following a tick bite or time spent outdoors in Missouri, you're not alone, and you don't have to figure it out on your own.

Dr. Douglas Meyer offers a comprehensive Alpha-Gal evaluation and individualized 6-week treatment protocol at our Hermann and Montgomery City locations, combining acupuncture, nutritional guidance, and lab monitoring to move patients from reactivity toward resilience.

Learn About Our Alpha-Gal Treatment Program

Sources

[1] Centers for Disease Control and Prevention. (2026). About alpha-gal syndrome.https://www.cdc.gov/alpha-gal-syndrome/about/index.html

[2] Centers for Disease Control and Prevention. (2026). Fast facts: Products that may contain alpha-gal.https://www.cdc.gov/alpha-gal-syndrome/data-research/products-containing-alpha-gal/index.html

[3] Naseem, Z., Muhammad, A., Chatterjee, A., & Rubio-Tapia, A. (2025). Alpha-gal syndrome: Recognizing and managing a tick-bite–related meat allergy. Cleveland Clinic Journal of Medicine, 92(5), 311–319.https://doi.org/10.3949/ccjm.92a.24072

[4] Platts-Mills, T. A. E., Li, R.-C., Keshavarz, B., Smith, A. R., & Wilson, J. M. (2020). Diagnosis and management of patients with the α-Gal syndrome. The Journal of Allergy and Clinical Immunology: In Practice, 8(1), 15–23.https://doi.org/10.1016/j.jaip.2019.09.017

[5] Wilson, J. M., Schuyler, A. J., Workman, L., Gupta, M., James, H. R., Posthumus, J., McGowan, E. C., Commins, S. P., & Platts-Mills, T. A. E. (2019). Investigation into the α-Gal syndrome: Characteristics of 261 children and adults reporting red meat allergy. The Journal of Allergy and Clinical Immunology: In Practice, 7(7), 2348–2358.https://doi.org/10.1016/j.jaip.2019.03.031

[6] Centers for Disease Control and Prevention. (2024). Preventing tick bites.https://www.cdc.gov/ticks/prevention/index.html

[7] Centers for Disease Control and Prevention. (n.d.). Diseases spread by ticks.https://wwwnc.cdc.gov/travel/page/diseases-spread-by-ticks