The Fast-Growing Food Allergy You Don’t Know About, But Should

A woman with a rash on her neck scratches her skin while grimacing in discomfort.

Living with alpha-gal syndrome means more than giving up red meat. Here's why this fast-growing tick-borne food allergy is truly life changing.

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The information provided on this site is based on my personal experience living with alpha-gal syndrome. I consistently cite and link to expert sources, but nothing published on this site should be perceived as medical advice.

Alpha-gal sensitivities vary by person. You should understand your dietary restrictions, making any adjustments needed, and directing any questions to your physician.

Imagine a bite of a familiar food that you’ve enjoyed your whole life suddenly becoming a medical emergency. This isn’t science fiction — it’s a fast-growing food allergy that you’ve likely never heard of. One tiny bug bite can unleash an allergy you never knew existed, requiring you to redefine your relationship with food, cosmetics, medications, and more.

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In This Article

The Tick Bite That Redefines Your Diet

With one bite, the lone star tick injects a sugar molecule known as alpha-gal into your bloodstream. While harmless to most, some people develop an immune response to alpha-gal, which leads to a condition known as alpha-gal syndrome (AGS). 

Although primarily found in the southeastern, south-central, and mid-Atlantic states, the University of Rhode Island’s TickEncounter reports that lone star ticks have been seen as far west as Colorado and Wyoming and as far north as Maine. As the lone star tick expands its range across the US, cases of AGS are also on the rise. 

Range of the Lone Star Tick in the United States

Marilyn Paquet is a business analyst in Franklin, Virginia, about an hour west of Norfolk. Over Labor Day weekend in 2017, over 100 larval lone star ticks bit her while she was camping. “Several weeks later, in October, I had my first reaction after eating beef tacos for dinner,” Paquet explained. “My palms got bright red, slightly swollen, incredibly itchy, and felt like I’d just placed them on a hot stove. Next came excruciating abdominal pain followed by hives all over my body.”

Lone star tick on a green leaf
Photo credit: Shutterstock

What is Alpha-gal Syndrome?

Also known as alpha-gal allergy, red meat allergy, or tick bite meat allergy, the symptoms of AGS are wide-ranging and vary from person to person. The Centers for Disease Control and Prevention (CDC) shares that people affected by AGS can experience mild to life-threatening reactions that range from an itchy rash to severe abdominal pain to anaphylactic shock. Symptoms often don’t appear until hours later and can vary from person to person, fueling the mystery and challenges of diagnosing and managing this tick-borne food allergy. It can affect anyone, regardless of age — both adults and children.

Between 2010 and 2022, the U.S. saw 110,000 suspected cases of alpha-gal syndrome. However, the CDC  believes many more cases were likely undiagnosed and/or unreported — partly due to a lack of understanding and awareness of AGS among healthcare professionals — and that up to 450,000 people might have been affected by AGS since 2010. A survey conducted by the CDC revealed that 42% of healthcare providers had never heard of AGS. Of those who recognized the condition, less than one-third knew how to diagnose it.

After eating a pastrami sandwich, Paquet had another reaction that mirrored the first. “My boyfriend mentioned he recently read a news report about a girl a tick had bitten and that she could no longer consume mammalian products. I thought he was joking, but when I searched online, I discovered alpha-gal syndrome.”

Unfortunately, it wasn’t so easy for Paquet to get a blood test to confirm her suspicion. “After a few doctors thought I was crazy, I found a fantastic allergist who knew about alpha-gal. A blood test quickly confirmed I could no longer eat beef, bacon, or any other mammalian meat I’d previously enjoyed my whole life.”

The Hidden Impact of Alpha-gal Syndrome

An AGS diagnosis goes far beyond revamping your dinner menu. Everyday products, from your favorite moisturizer to over-the-counter pain relievers, can harbor hidden ingredients that trigger allergic reactions.

Best Protein Sources for Alpha Gals

Following an Alpha-gal Diet

Living with AGS isn’t just skipping steak dinners or avoiding a hot dog at the ballpark. Instead, avoiding red meat is “just the beginning,” according to allergist and immunologist Scott P. Commins, MD, PhD. That’s because mammalian byproducts are present in an overwhelming number of foods, personal care items, and medical products. For example, gelatin — typically derived from cows or pigs — is commonly found in marshmallows, candy, and some medications. Additionally, many packaged foods, from cereal to vegetable juice, include an ingredient labeled as natural flavoring that can be mammal-based.  While it’s relatively easy to pronounce ingredients like gelatin and natural flavoring and identify them on food packaging, mammalian byproducts are numerous. They often have obscure names like anthropodeoxycholic acid and glyceryl tristearate. Complicating things further, there isn’t a single official list of mammalian byproducts.
A person is applying lotion to the palm of their hand.
Photo Credit: Pexels.

Hidden Dangers in Cosmetics

For people living with AGS, personal care products can present unexpected challenges. Many cosmetics and personal care items — including lotions, creams, and makeup — contain hidden mammalian byproducts, like gelatin or glycerin. They can pose a risk to people with alpha-gal. While some companies offer plant-based products, a lack of federal regulation in the U.S. means that manufacturers may use terms like plant-based and vegan as they like. This can make it difficult for alpha-gals to make safe choices. 

Jenny Keller is a first-grade teacher in Boonville, Missouri, about 100 miles east of Kansas City. She believes she had AGS for 12 years before being officially diagnosed in March 2022. In addition to following a very strict alpha-gal diet, she must also be mindful of the health, hygiene, and beauty products she uses. “I have to use vegan toilet paper, laundry detergent, body wash, toothpaste, and deodorant,” said Keller, “or else I experience severe inflammation, hives, and itching. Same for my shampoo, conditioner, and make-up.”

A person is holding a brown pill bottle in one hand and dispensing pills into the other hand.
Photo Credit: YayImages.

Navigating Medical Treatments with AGS

An alpha-gal diagnosis also significantly impacts medication and medical treatments. According to Alpha-Gal Information, more than 20,000 drugs, vaccines, and medical products contain mammalian byproducts. This makes everything from over-the-counter options for a headache or common cold to prescription medications and anesthesia used during surgery more complicated for people with AGS. And because the medical community doesn’t widely understand the condition, many alpha-gal patients have difficulty working with their insurance company to identify and receive equal coverage for safe alternatives.

Due to alpha-gal, Paquet cannot take the heart medication her physician prescribed. “Not only does it come in a gel capsule derived from cows, but it includes several other inactive ingredients that are also derived from mammals.” She continued, “My only option is to work with a compound pharmacy that puts the same active ingredients in a veggie cap, but insurance companies don’t cover compound medications, so I have to pay $200 per month for medication that is otherwise covered with a modest co-pay.” 

To Avoid Contracting Alpha-gal Syndrome

To avoid developing alpha-gal syndrome or worsening any existing symptoms, you must minimize your exposure to ticks. Wear long-sleeved shirts and pants when you are in wooded or grassy areas. Wear permethrin-treated clothing and insect repellents with DEET, and conduct a tick check of your body, clothing, and pets when coming in from the outdoors.

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Photo Credit: Pexels.

Moving Forward with Alpha-gal Syndrome

If you suspect you or someone you love has alpha-gal syndrome, request an alpha-gal IgE test. This is a blood test that checks for a special kind of antibody associated with allergies called immunoglobulin E. It will easily confirm or deny your suspicions. 

Alpha-gal syndrome can be a life-altering diagnosis, demanding vigilance and a complete overhaul of your daily routine. But with knowledge comes empowerment. By understanding the hidden dangers and advocating for yourself, you can navigate life with AGS and still enjoy the things you love. While AGS may redefine your relationship with food and products, it doesn’t have to define you.

Thank you for sharing!

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