Why Can I Eat Cheddar Cheese but Not Brie? | Alpha-gal Syndrome Explained

Why Can I Eat Cheddar Cheese but Not Brie? Understanding Dairy Reactions in Alpha-gal Syndrome

By Dr. David J. Moreland, DC, CCSP, Licensed Acupuncturist Moreland Chiropractic Clinic; Rolla, Missouri

If you've been diagnosed with Alpha-gal Syndrome (AGS), you've probably discovered something frustrating: one dairy product may cause no symptoms while another sends you running to the bathroom or leaves you feeling miserable.

One of the most common questions I hear from patients is:

"Why can I eat cheddar cheese, but Brie gives me diarrhea?"

The answer isn't always simple, but there are several reasons this can happen. Understanding these differences can help you safely expand your diet while avoiding unnecessary reactions.

First, Remember: Every Alpha-gal Patient Is Different

There is no single "Alpha-gal diet" that works for everyone.

Some people cannot tolerate even small amounts of dairy, while others can eat certain cheeses without any problems. Your reaction depends on several factors, including:

Your Alpha-gal IgE level Your overall immune response Your history of recent tick bites The type of dairy product The amount eaten The fat content of the food Individual digestive sensitivity

This is why personalized guidance is so important.

Why Cheddar Is Often Better Tolerated

Many Alpha-gal patients find that aged cheddar cheese is one of the first dairy products they can successfully reintroduce.

Several factors may contribute:

Lower Moisture

Cheddar is a firm cheese with relatively low moisture. During aging, much of the moisture leaves the cheese, changing its structure and composition.

Moderate Fat Content

Although cheddar contains fat, it generally has less surface cream than soft-ripened cheeses such as Brie. Because Alpha-gal is associated with mammalian-derived products, foods with higher fat content may provoke symptoms in some individuals.

Controlled Aging Process

Cheddar is produced using a predictable aging process that creates a relatively consistent product. Many patients simply find it easier to tolerate than richer cheeses.

Why Brie Can Be More Difficult

Brie is very different from cheddar.

It is:

Soft Creamy Higher in fat Richer Surface ripened with molds

While the molds themselves are not known to cause Alpha-gal reactions, Brie contains more milk fat and a richer composition than cheddar. For some patients, this combination appears to make symptoms more likely.

Many patients report:

Diarrhea Stomach cramping Bloating Nausea Abdominal discomfort

after eating Brie, even though they tolerate cheddar.

This difference does not necessarily mean your Alpha-gal Syndrome is getting worse. It simply highlights that different dairy products place different demands on your digestive and immune systems.

Does Fat Matter?

For many patients, the answer appears to be yes.

Research suggests Alpha-gal is associated with a carbohydrate (galactose-α-1,3-galactose) found in mammalian products. Fat-rich foods often produce delayed digestion, and many patients report stronger reactions after eating fatty mammalian foods.

Although not every patient reacts the same way, many notice that lower-fat dairy products are easier to tolerate than richer, cream-based products.

Why We Recommend Reintroducing Foods Slowly

One mistake many people make is trying multiple new foods on the same day.

If you react, you'll have no idea which food caused the problem.

In my practice, I encourage patients to introduce only one new mammalian food at a time and give it several days before moving to the next step.

A gradual approach may look like this:

Step 1

A small cube of aged cheddar cheese once daily for 7 to 10 days.

If no symptoms occur, move to the next step.

Step 2

A very small piece of lean bacon (about a ½-inch strip), removing as much visible fat as possible.

Continue for several days while watching for symptoms.

Step 3

A small spoonful of lean hamburger with no seasoning or excess grease.

Increase only if tolerated.

Patients should avoid introducing several new foods together. If symptoms develop, it's much easier to identify the cause.

Keep Other Foods Simple

When trying a new mammalian food:

Don't experiment with several foods at once. Avoid rich sauces and gravies. Avoid large meals. Stay with foods you already know you tolerate. Keep a food and symptom diary.

This makes it much easier to determine what your body is telling you.

Don't Judge Progress by One Meal

One successful meal does not necessarily mean you're "cured."

Likewise, one reaction doesn't always mean you've permanently lost tolerance.

Many things can influence symptoms, including:

Recent tick bites Illness Stress Exercise Alcohol The amount consumed The specific food preparation

Recovery often occurs gradually rather than all at once.

Should You Repeat Your Alpha-gal Blood Test?

In many cases, yes.

Monitoring your Alpha-gal IgE level, along with your symptoms, can provide useful information over time. However, laboratory values should always be interpreted alongside your clinical history. Some patients with relatively low IgE levels still experience reactions, while others with higher levels tolerate certain foods.

Experience Matters

Because Alpha-gal Syndrome affects every patient differently, there is rarely a one-size-fits-all approach.

At Moreland Chiropractic Clinic in Rolla, Missouri, I work with patients to develop individualized plans based on their symptoms, laboratory results, and progress over time. The goal is to help patients understand their condition and make informed decisions about food reintroduction while working alongside their primary care physician or allergist when appropriate.

Schedule a Consultation

If you have Alpha-gal Syndrome and have questions about food reintroduction, laboratory testing, or treatment options, we're here to help.

Moreland Chiropractic Clinic Rolla, Missouri Phone: 573-364-8086

Frequently Asked Questions

Can all Alpha-gal patients eat cheddar cheese? No. Some patients cannot tolerate any dairy products, while others tolerate certain cheeses. Individual responses vary.

Is Brie dangerous for everyone with Alpha-gal? No. Some patients tolerate Brie, while others develop gastrointestinal symptoms. Reactions are highly individual.

Should I try several new foods together? No. Introduce only one new mammalian food at a time so any reaction can be identified more easily.

Does a lower Alpha-gal IgE level mean I can eat anything I want? Not necessarily. Blood test results are only one part of the picture and should always be considered alongside your symptoms and medical history.