Pizza, pasta, bread, cookies, cake — the list of foods made from gluten can go on. Gluten is found in many carbohydrate-rich foods; however, it’s gotten a bad rap in recent years, often cited for causing inflammation, irritation, and upset stomach.

However, gluten isn’t evil — as much as diet culture may try to make us think otherwise. In fact, it’s often not even the root cause of inflammation.

While many people jump to eliminate gluten from their diets in the hope of reducing inflammation or other stomach troubles, it’s important to understand the full picture before cutting out all those nutrient-rich foods.

What to Know About Gluten and Inflammation

Gluten is a protein found in wheat, barley, rye, and triticale (a cross between rye and wheat).¹ 

With the ways gluten is talked about on social media and from self-proclaimed health gurus, you may be wondering: Does gluten cause inflammation? Is gluten bad for everyone?

While gluten can cause inflammation in some individuals, especially those with specific health conditions, it’s definitely not bad for everyone. In fact, many gluten-containing foods have many essential nutrients our bodies need.

In certain conditions, the immune system reacts to gluten in a way that leads to inflammation, including:

• Celiac disease 
• Non-celiac gluten sensitivity 
• Wheat allergy

In individuals with celiac disease, gluten triggers an autoimmune reaction that causes inflammation and physical damage to the lining of the small intestine, which can impair nutrient absorption and lead to long-term health complications if untreated. While celiac makes consuming gluten dangerous, it is rare, occurring in around 1% of the population.²

In people with non-celiac gluten sensitivity, gluten ingestion can trigger symptoms such as bloating, abdominal pain, and fatigue. However, the inflammatory response is typically different from the autoimmune damage seen in celiac disease.³

A true wheat allergy, meanwhile, will cause symptoms similar to other allergic reactions, including hives, rashes, headaches, trouble breathing, cramps, nausea, or diarrhea.⁴

Although gluten can cause inflammation, a true inflammatory response is condition-specific, rather than universal, and other causes are far more common than a gluten-specific issue. 

Gluten Does Not Affect Everyone in the Same Way 

While gluten intolerances, allergies, and inflammation have gained more attention in recent years, it’s important to understand: Most people tolerate gluten without any inflammatory response.

Research consistently shows: 

• Many individuals can consume gluten without symptoms 
• Reactions vary widely depending on underlying conditions 
• Some symptoms attributed to gluten may be caused by other components of wheat 

For example, studies suggest that certain carbohydrates in wheat, such as fructans, may trigger symptoms in some people rather than gluten itself.⁵ This response may cause some individuals to assume they have an allergy, and unnecessarily remove gluten from their diet when there’s no true health risk.

It can also be difficult to determine true allergies because randomized trials have found that inflammatory markers may not differ significantly between people who suspect gluten sensitivity and healthy controls.⁶ 

Gluten is not inherently inflammatory for everyone—individual biology, medical history, and digestive health play a significant role, so it’s critical to work with a healthcare professional before removing gluten from your diet.

There is No Single Test for Gluten Sensitivity Outside of Celiac Disease or Allergy

Many people wonder whether the inflammation they are experiencing is caused by gluten. When it comes to gluten sensitivity vs celiac disease or a true wheat allergy, it’s not always straightforward, and the answer is often more complex than a simple blood test.

While there are definitive tests that can determine if an individual has celiac disease or a wheat allergy—diagnosed through blood tests and biopsy, or allergy testing, respectively—it’s much more difficult to determine if an individual has non-celiac gluten sensitivity.⁷

Non-celiac gluten sensitivity is currently diagnosed based on a structured process that includes eliminating gluten for 6-8 weeks, determining if symptoms resolve, and then reintroducing it to see whether symptoms return.⁸ 

Other Factors and Foods That Can Contribute to Inflammation

While gluten can cause inflammation in certain individuals, especially when a true allergy is present, it is only one potential cause.

Many different lifestyle and dietary factors can contribute to inflammation and related symptoms, including:⁹

Dietary Factors	Lifestyle Factors	Medical Factors
Alcohol consumption	Exposure to toxins and chemicals	Autoimmune conditions
Imbalance of gut microbiota	Poor sleep quality	Chronic infections
Low fiber intake	Stress (especially chronic)	Gastrointestinal disorders
Saturated fat intake	Tobacco use	Metabolic conditions

 

A qualified healthcare professional will help explore these factors as possible contributors or causes of inflammation.

Common Conditions That Are Frequently Mistaken for Gluten Sensitivity 

Symptoms of gluten intolerance frequently overlap with other conditions, many of which occur more frequently than gluten intolerance.

Some other conditions that may overlap with gluten intolerance symptoms include:

• Anxiety or stress-related gut symptoms
• Constipation
• Gastroesophageal reflux disease
• Irritable bowel syndrome 
• Lactose intolerance 
• Low fiber intake
• Rapid dietary changes 
• Small intestinal bacterial overgrowth (SIBO)

How Eliminating Gluten Can Affect Nutrient Intake and Overall Diet Quality 

While eliminating gluten is medically necessary for some individuals, there are some important gluten-free diet risks and nutrient deficiencies to be aware of.

Gluten-free diets are often lower in critical nutrients, including:¹º

• Certain B vitamins, including folate (B9)
• Fiber
• Iron
• Whole grains

Because many gluten-free products are made from refined starches instead of whole grains, they are often missing those critical nutrients. Over time, individuals may face complications due to those deficiencies.

Working with an expert registered dietitian nutritionist can help ensure that if you are on a medically necessary gluten-free diet, you’re still getting all the essential nutrition.

Eliminating Gluten May Also Affect the Gut Microbiome 

When it comes to gluten and gut health, whole grains containing gluten are important sources of prebiotic fibers that support beneficial gut bacteria. When these foods are removed, the microbiome can shift.

Research shows that when restricting gluten, changes in carbohydrate intake can alter the composition of gut bacteria and fermentation products in the intestine.¹¹ One study noted that this shift can cause an “overgrowth of harmful bacteria and infections.”

While this may be intimidating, it doesn’t mean that gluten-free diets are harmful. In fact, for individuals where it’s medically necessary, it can be much more harmful to consume gluten. But in individuals where it is not medically necessary, it poses an unnecessary and increased risk.

The Importance of Replacing Nutrients in a Gluten-Free Diet

Those on a gluten-free diet may benefit from incorporating lost nutrients with alternatives, including:

• Beans
• Fruits
• Lentils
• Oats (certified gluten-free, if needed)
• Nuts
• Quinoa
• Rice
• Seeds
• Vegetables

Many of these foods are nutrient-rich and will support a well-rounded diet with the essential vitamins and minerals our bodies need.

Considerations Before Eliminating Gluten

Before removing gluten, it can be helpful to explore all the possibilities of inflammation and other symptoms. Scheduling an appointment with a healthcare provider will ensure you are nourishing yourself and not unnecessarily removing certain food groups.

And if you do have a true illness or allergy that makes it medically necessary for you to remove gluten, they’ll ensure you do it in a way that doesn’t impact your quality of life and, most importantly, your health.

Monitor:

• What you ate
• Any symptoms that arose
• How long after they arose

Ask:

• What kind of testing, if any, is necessary?
• How will you ensure I am still meeting my nutritional needs?

This all helps determine whether changes are truly related to gluten, or if there’s another possible cause that may need attention.

Signs Gluten is Not the Problem

While a gluten allergy, intolerance, or celiac disease can all cause serious symptoms, many other causes can contribute to inflammation:

Symptoms Do Not Consistently Occur After Eating Gluten 

Gluten symptoms are not always consistent, and:

• Do not reliably follow gluten-containing meals 
• Happen even on gluten-free days
• Occur randomly 
• Vary widely from day to day 

With non-celiac gluten sensitivity, research shows that symptom patterns are often inconsistent and influenced by expectation and other dietary components.¹² For example, one randomized study found that patients who believed they were sensitive to gluten experienced more symptoms from fructans (a fermentable carbohydrate found in wheat), rather than gluten itself.

Symptoms Persist Despite Removing Gluten 

If symptoms continue after a well-implemented gluten-free diet, this is a strong indicator that inflammation and/or other symptoms could be caused by other factors, including:¹³

• Constipation 
• Gut motility issues
• High FODMAP intake
• Hormonal changes
• Inadequate fiber intake
• Irritable bowel syndrome
• Lactose intolerance
• Stress or anxiety

Symptoms Improve with Broader Dietary or Lifestyle Changes, Not Just Gluten Removal 

If symptoms improve when multiple factors change at the same time, gluten may not be the main driver.

Many changes can impact digestion and inflammation independently of gluten. Overall dietary patterns, rather than single foods or gluten itself, may be linked with inflammation, including:

• Eating more regularly 
• Increasing fiber intake 
• Increasing hydration 
• Improving sleep 
• Managing stress
• Treating constipation 

These changes affect digestion and inflammation independently of gluten. Research shows that overall dietary patterns, rather than single foods, are strongly associated with inflammation levels, which is another reason to investigate other potential causes before removing gluten from your diet.¹⁴ 

Digestive Symptoms Occur Primarily After Large Meals or Certain Types of Foods 

Some symptoms attributed to gluten are actually related to: 

• Meal size 
• Fat content 
• Fermentable carbohydrates 
• Fiber changes

While it’s natural to want to manage these symptoms, sometimes, our bodies can react to different foods in many ways—and it’s natural that shifts in our diet may cause some symptoms, especially specific food groups.

For example, research shows that fermentable carbohydrates are a common trigger for gastrointestinal symptoms in people with irritable bowel syndrome.¹⁵ 

There is No Improvement in Objective Markers of Inflammation 

People sometimes assume inflammation is present purely based on symptoms; however, symptoms like fatigue, bloating, or joint pain are not actually specific indicators of inflammation and can be caused by other factors. 

Specific laboratory markers indicate gluten-related inflammation:

• Celiac antibodies 
• C-reactive protein (CRP) 
• Erythrocyte sedimentation rate (ESR) 

If those markers remain stable despite dietary changes, gluten is less likely the cause of inflammation.

Clinical reviews emphasize that non-celiac gluten sensitivity does not consistently show measurable inflammatory markers, which makes diagnosis more dependent on symptom patterns.¹⁶ 

Symptoms Began After a Major Stressor or Life Change

Stress and life changes that may cause stress are some of the most common drivers of digestive symptoms and systemic inflammation. 

Examples include: 

• Dietary changes 
• Hormonal transitions or fluctuations (Menstrual cycles, Perimenopause, Menopause)
• Illness
• Sleep disruption 
• Travel
• Work stress

Stress affects our entire body, including the gut through the brain–gut axis, and can alter motility, sensitivity, and microbiome function in the short- and long-term. 

Research shows that psychological stress can worsen gastrointestinal symptoms and increase inflammatory signaling in the body.¹⁷ 

How to Know if Going Gluten-Free is Right for You

Before going head-first into a gluten-free diet, you want to be sure you’re working with a professional who can help you explore all potential causes of inflammation and other symptoms.

Going gluten-free when it’s not necessary—and especially if another condition is causing the symptoms—can lead to nutritional deficiencies and prolong a diagnosis, causing further complications. If you’re wondering when to see a dietitian for gluten sensitivity, it’s a good idea to schedule an appointment and ensure you can explore all the possibilities.

Working with a registered dietitian nutritionist is one of the best ways to ensure you’re meeting all your nutritional needs—and they can help direct you toward next steps if a medical concern is the root of your symptoms.

Schedule an appointment with Life Cycle Nutrition, and we’ll take the next step with you to care for your health while answering all your questions about gluten and inflammation.

As weight-inclusive dietitians in Omaha, we’re focused on supporting your health without unnecessary restrictions. We’ll work together to make sure you have food freedom and can enjoy foods that make you feel good, inside and out!

 

Works Cited

1. Rajagopal, Selvi. n.d. “What Is Gluten and What Does It Do?” Johns Hopkins Medicine. Accessed July 29, 2026. https://www.hopkinsmedicine.org/health/wellness-and-prevention/what-is-gluten-and-what-does-it-do.
2. Lebwohl, Benjamin, David S. Sanders, and Peter H. Green. 2018. “Coeliac disease.” The Lancet 391, no. 10115 (July): 70-81. https://doi.org/10.1016/S0140-6736(17)31796-8.
3. Roszkowska, Anna, Marta Pawlicka, Anna Mroczek, Kamil Balabuszek, and Barbara Nieradko-Iwanicka. 2018. “Non-Celiac Gluten Sensitivity: A Review.” Medicina 55, no. 6 (May). https://doi.org/10.3390/medicina55060222.
4. Mayo Clinic Staff. 2025. “Wheat allergy-Wheat allergy – Symptoms & causes.” Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/wheat-allergy/symptoms-causes/syc-20378897.
5. Skodje, Gry I., Vikas K. Sarna, Ingunn H. Minelle, Kjersti L. Rolfsen, Jane G. Muir, Peter R. Gibson, Marit B. Veierød, Christine Henriksen, and Knut E. Lundin. 2017. “Fructan, Rather Than Gluten, Induces Symptoms in Patients With Self-Reported Non-Celiac Gluten Sensitivity.” Gastroenterology 154, no. 3 (November): 529-539. https://doi.org/10.1053/j.gastro.2017.10.040.
6. Dale, Hanna F., Julianne C. Johannessen, Ingeborg Brønstad, and Gülen A. Lied. 2021. “Assessment of Markers of Gut Integrity and Inflammation in Non-Celiac Gluten Sensitivity After a Gluten Free-Diet.” International Journal of General Medicine 14 (December): 9459-9470. https://doi.org/10.2147/IJGM.S333078.
7. Mayo Clinic. 2026. “Celiac disease – Diagnosis and treatment.” Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/celiac-disease/diagnosis-treatment/drc-20352225.
8. Catassi, Carlo, Luca Elli, Bruno Bonaz, Gerd Bouma, Antonio Carroccio, Gemma Castillejo, Christophe Cellier, et al. 2015. “Diagnosis of Non-Celiac Gluten Sensitivity (NCGS): The Salerno Experts’ Criteria.” Nutrients 7, no. 6 (June): 4966-4977. https://doi.org/10.3390/nu7064966.
9. Cleveland Clinic. 2024. “What Is Inflammation? Types, Causes & Treatment.” Cleveland Clinic. https://my.clevelandclinic.org/health/symptoms/21660-inflammation.
10. Gerszberg, Deborah. 2015. “Nutrient deficiencies and the gluten free diet.” Columbia Surgery. https://columbiasurgery.org/news/2015/11/18/nutrient-deficiencies-and-gluten-free-diet.
11. Sanz, Yolanda. 2010. “Effects of a gluten-free diet on gut microbiota and immune function in healthy adult humans.” Effects of a gluten-free diet on gut microbiota and immune function in healthy adult humans 1, no. 3 (March): 135-137. https://doi.org/10.4161/gmic.1.3.11868.
12. Skodje et al., “Fructan, Rather Than Gluten, Induces Symptoms.”
13. Roszkowska et al., “Non-Celiac Gluten Sensitivity.”
14. Halmos, Emma P., Victoria A. Power, Susuan J. Shepherd, Peter R. Gibson, and Jane G. Muir. 2014. “A diet low in FODMAPs reduces symptoms of irritable bowel syndrome.” Gastroenterology 146, no. 1 (January): 67-75. https://doi.org/10.1053/j.gastro.2013.09.046.
15. Cleveland Clinic, “What Is Inflammation?”
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17. Konturek, Peter C., T. Brzozowski, and S. J. Konturek. 2011. “Stress and the gut: pathophysiology, clinical consequences, diagnostic approach and treatment options.” The Journal of Physiology and Pharmacology 62, no. 6 (December): 591-599. https://pubmed.ncbi.nlm.nih.gov/22314561/.