When it comes to health and nutrition, few words have generated as much controversy in the last decade as gluten . Some demonize it, while others defend it as an essential part of the diet. Amid this debate, more and more people are eliminating gluten from their daily meals, sometimes without a medical reason to justify it. But what's really behind gluten's notoriety? Is it necessary to do without it to feel better? Let's take an in-depth look at all aspects related to the benefits and drawbacks of gluten and discover for whom its consumption might be problematic and who, on the contrary, can consume it without fear.
If you've ever wondered whether gluten is good or bad for your health , this article will give you a comprehensive and practical overview of what the evidence and clinical experience tell us. Here you'll find reliable information, clear signs to identify potential problems, and helpful tips whether you're considering eliminating gluten or simply want to learn more about how it affects the body.
What is gluten really and why is there so much talk about it?
Gluten is a plant-based protein found naturally in various grains such as wheat, barley, rye, and their derivatives, as well as in mixtures like triticale. Its main function in the food industry is to give elasticity and a spongy texture to doughs (breads, pasta, pastries, etc.), which is why it is widely used. However, it is also present in numerous processed products , sauces, dressings, and even medications and cosmetics, making it essential to exercise extreme caution, especially for people with celiac disease.
The rise in popularity of gluten-free diets and the significant increase in diagnoses of celiac disease and gluten sensitivity have made this protein a central topic in health debates. As a result, many myths and misunderstandings exist today regarding its impact. In fact, the number of people who have chosen to eliminate it from their diet far exceeds those who actually need it for medical reasons.
What explains this trend? Largely, it's due to confusion between real medical conditions and dietary fads , but also to a lack of understanding about when gluten is problematic and when it's safe. Let's explore this further.
Composition and function of gluten
From a biochemical standpoint, gluten is primarily composed of gliadins and glutenins . Glutenins give dough its elasticity, while gliadins provide extensibility. This characteristic is what gives gluten its distinctive texture, making it responsible for the characteristic texture of bread and other baked goods.
However, the molecular structure of gluten , especially the abundance of glutamine and proline residues, makes it difficult for human digestive enzymes to break down. This means that some gluten remains undigested, even in healthy individuals, and can affect the intestinal barrier and the immune response.
Why does gluten cause problems for some people?
The reason why gluten can be harmful depends primarily on genetic predisposition and individual sensitivity . There are three main groups of gluten-related disorders:
- Celiac Disease: It is an autoimmune disorder in which the immune system reacts and damages the small intestine after the consumption of gluten.
- Non-celiac gluten sensitivity: People who have symptoms similar to celiac disease (bloating, discomfort, fatigue, etc.), but who do not have intestinal damage or autoantibodies.
- wheat allergy: An IgE-mediated allergic reaction to wheat proteins, which can be potentially severe.
Celiac disease , in particular, has been extensively studied. This disease affects between 1% and 2% of the population and can appear at any age, although diagnosis in adults is becoming increasingly common. People with celiac disease must completely eliminate all traces of gluten from their diet, as even small amounts can cause intestinal damage and long-term complications such as osteoporosis, infertility, or colon cancer.
In the case of non-celiac gluten sensitivity , the condition is milder and more difficult to diagnose. There are no specific tests, and the diagnosis is made by exclusion, after ruling out celiac disease and wheat allergy. Symptoms can be digestive (bloating, gas, diarrhea, abdominal pain) or non-digestive (fatigue, migraines, skin problems).
Wheat allergy involves an immediate immune response and can have serious consequences (hives, anaphylaxis, rhinitis) if not properly controlled.
Is gluten bad for everyone?
Despite the popularity of gluten-free diets, scientific studies have found no evidence that gluten is harmful to the vast majority of healthy people . In fact, for those without celiac disease, sensitivity, or allergy, gluten can be a perfectly acceptable part of a varied and balanced diet. Cereals containing gluten are, in fact, an excellent source of carbohydrates, fiber, B vitamins, iron, and magnesium , all essential for digestive, cardiovascular, and brain health.
Therefore, gluten should only be eliminated under medical supervision and after a clear diagnosis. Eliminating gluten without a valid reason can be more harmful than beneficial, as it can lead to nutritional deficiencies (especially of fiber and vitamins) and the temptation to replace gluten-containing foods with unhealthy, ultra-processed "gluten-free" products.
The role of gluten in a balanced diet
Gluten helps maintain the texture and shape of essential foods like bread and pasta. Diets rich in whole grains containing gluten are often associated with improvements in the gut microbiota , greater satiety, and a lower risk of cardiovascular disease and type 2 diabetes. However, as with any nutrient, the quality and variety of the diet are key.
Including whole grains containing gluten, such as whole wheat, spelt, or rye, promotes a balanced diet and helps prevent deficiencies. However, it's always advisable to pay attention to the origin of the products, preferably organic and artisanal , to avoid excessive additives and unwanted sugars.
When should gluten be strictly avoided?
There are three main situations in which eliminating gluten is essential :
- Celiac DiseaseDiagnosis confirmed by a specialist through serological testing and biopsy. Gluten damages the intestinal mucosa and can have systemic consequences. The only solution is a strict, lifelong gluten-free diet.
- Non-celiac gluten sensitivity: Those affected experience discomfort when ingesting gluten, although there is no intestinal damage or immunological scarring. Eliminating gluten usually improves symptoms.
- wheat allergy: The body reacts to certain proteins in wheat, with symptoms that can be severe. In this case, Eliminating wheat (and, by extension, gluten) is essential.
If you think gluten is making you feel unwell, it's essential to consult a specialist first . Never self-diagnose or start a restrictive diet without supervision. Only a professional can determine the cause of your symptoms and avoid misdiagnoses or unnecessary treatments.
What foods contain gluten and which ones are safe?
Gluten is naturally present in cereals such as wheat, barley and rye , as well as in all their varieties and derivatives (spelt, kamut, triticale, bulgur, couscous, bread, pasta, pastries, beer, breakfast cereals, cookies, flours, breadcrumbs, etc.).
However, there are many naturally gluten-free foods that can be a main part of the diet:
- Vegetables, greens, fresh fruits
- Fish, eggs, unprocessed meats
- Legumes
- Milk and most simple dairy products
- pseudocereals such as quinoa, buckwheat, millet, amaranth, sorghum
- Gluten-free grains: rice, corn, tapioca, teff
Be careful with oats: although pure oats are gluten-free, they are often contaminated unless certified gluten-free. Furthermore, they contain avenins, which can cause symptoms in some people with celiac disease.
Be careful with processed products : sauces, dressings, sausages, cold cuts, flavored yogurts, frozen and packaged products may contain gluten as a thickener or due to cross-contamination. Always check the label and look for the "gluten-free" seal; it's essential.
Basic table of foods with and without gluten
| Category | Gluten-free | With gluten |
|---|---|---|
| cereals and grains | Rice, corn, quinoa, buckwheat, millet, amaranth, sorghum, teff | Wheat, rye, barley, spelt, kamut, triticale |
| Bread and pastries | Gluten-free bread (certified), rice cakes, corn biscuits | Traditional bread, industrial pastries, cookies with wheat flour |
| Dairy | Milk, fresh cheeses, natural yogurt | Yogurts and dairy desserts with dubious thickeners |
| Meat and fish | Fresh, unprocessed and uncoated | Breaded meats, hamburgers, industrial sausages |
| Legumes and nuts | Whole grain, natural | Toasted or processed with flours |
| Beverages | Water, juices, wine, coffee | Beer, malt, some processed beverages |
How do you know if you are gluten intolerant or sensitive?
If you experience symptoms such as bloating, abdominal pain, diarrhea, fatigue, migraines, or skin rashes after consuming gluten-containing products , always consult a healthcare professional. Diagnosing celiac disease requires blood tests (anti-tissue transglutaminase antibodies, anti-endomysial antibodies, etc.) and, if necessary, an intestinal biopsy. There is no specific test for non-celiac gluten sensitivity; the diagnosis is one of exclusion.
Therefore, if you experience discomfort and improvement after eliminating gluten, do not self-diagnose or start a gluten-free diet on your own, as other intolerances or underlying health conditions may be present . It is crucial to rule out celiac disease before removing gluten, since changing your diet beforehand can hinder a correct diagnosis.
What happens to the body when gluten is eliminated?
When a person with celiac disease or gluten sensitivity eliminates gluten, symptoms usually improve considerably in the short and medium term. The main benefits may include:
- Disappearance of digestive discomfort
- Reduction of fatigue and headaches
- Improvement of skin problems
- Normalization of nutrients in the blood (iron, vitamins, calcium, etc.)
- Recovery of the intestinal mucosa in celiac patients
It's important to keep in mind that recovery isn't always immediate . Some people notice a clear improvement within a few days, while in cases of severe intestinal atrophy or neurological complications, the process can take several months.
Is a gluten-free diet healthier for everyone?
The short answer is no, unless you have a medical condition . Gluten-containing grains, especially whole grains, provide a wide variety of vitamins, minerals, and fiber . Eliminating them unnecessarily can lead to deficiencies and, sometimes, an increase in ultra-processed foods labeled "gluten-free" which, paradoxically, are less healthy (more sugar, more fat, less fiber, and fewer nutrients).
Therefore, a gluten-free diet is only recommended if you have celiac disease, a wheat allergy, or a diagnosed sensitivity. If you decide to try it anyway, consult a nutritionist to ensure your diet remains varied and balanced.
Advantages and disadvantages of a gluten-free diet
- Advantages:
- Essential for people with celiac disease, wheat allergy or sensitivity
- It can help uncover possible triggers for digestive discomfort
- Promotes food education and label reading
- Disadvantages:
- Possible deficiencies of fiber, B vitamins, iron and magnesium if not replaced properly
- Risk of consuming more ultra-processed "gluten-free" foods with poor nutritional quality
- Higher economic cost: gluten-free packaged foods are usually considerably more expensive
- Social restrictions and difficulty finding variety in restaurants or travel
What foods should you choose if you want (or need) to avoid gluten?
The following foods are safe and recommended in a gluten-free diet :
- Fresh fruits and vegetables
- Legumes, natural nuts
- Eggs, meats and fish without dressings or breading
- Pseudocereals: quinoa, buckwheat, millet, amaranth
- Rice, corn, teff, sorghum, tapioca
- Simple dairy products (milk, natural yogurt, cheeses without additives)
Avoid the following foods unless they are certified "gluten-free":
- Pastries, cookies, bread, breakfast cereals, conventional pasta
- Battered, breaded, and industrial foods
- Malt beverages, beer
- Prepared sauces, sausages with thickeners
- Pre-cooked products, restaurant meals not specifically gluten-free
Managing a gluten-free diet on a daily basis
Adopting a gluten-free diet requires planning and awareness when buying and preparing food. This is essential:
- Read the labels to identify the possible presence of gluten and avoid cross-contamination
- Separate kitchen utensils if you live with people who do consume gluten
- Avoid shared cutting boards, toasters, and containers
- Look for establishments certified in gluten-free products, especially for pastries and bakery products.
- Consult with restaurants and ask how they prepare food
Additionally, it's important to keep in mind that some medications and supplements may contain gluten as an excipient, so it's always a good idea to ask at the pharmacy or consult the package insert.
Can gluten affect more than just the digestive system?
It is now known that gluten-related disorders can have systemic repercussions . In celiac disease, for example, in addition to classic digestive symptoms, fatigue, neurological disorders (sometimes called neurogluten, such as ataxia, neuropathies, mood changes), dermatological problems (dermatitis herpetiformis), hormonal and reproductive disorders, early-onset osteoporosis, and difficulty absorbing nutrients (anemia, vitamin deficiencies, etc.) may occur.
People with gluten sensitivity may also experience extra-digestive symptoms: headaches, lack of concentration, irritability, joint and muscle pain, or skin changes.
As for wheat allergy , the symptoms can be as varied as hives, itching, rhinitis, difficulty breathing, vomiting and, in the most severe cases, anaphylaxis (allergic shock that can be fatal).
The relationship between gluten and autoimmune diseases (such as thyroiditis, rheumatoid arthritis, type 1 diabetes) or neurodegenerative diseases (Alzheimer's, dementia) is under study, although at present there is not enough evidence to recommend gluten withdrawal in the general population.
Does gluten cause inflammation or cognitive impairment?
One of the most widespread myths is that gluten causes inflammation in everyone and contributes to the development of chronic diseases. Evidence to date shows that in healthy individuals, gluten does not cause systemic inflammation ; however, in predisposed individuals, it can increase intestinal permeability and promote an adverse immune response.
Some researchers have highlighted the possible relationship between gluten and "brain fog" or worsening of neurological symptoms in sensitive individuals. However, these effects remain unproven for the majority of the population.
Why do some people feel better when they go gluten-free?
Those who eliminate gluten often experience improvements in digestion, mood, and energy . However, this is frequently due not only to the absence of gluten but also to the elimination of ultra-processed foods, sugars, and saturated fats that often accompany it. Going gluten-free often involves adopting a healthier overall eating pattern, with a greater intake of fruits, vegetables, and fresh foods.
Is it possible to lose weight on a gluten-free diet?
Weight loss associated with a gluten-free diet is usually due to calorie reduction and the elimination of refined flours and processed foods , not the absence of gluten per se. Furthermore, some "gluten-free" products are significantly higher in calories and less satiating than their traditional counterparts. Therefore, if the goal is weight loss, the overall quality of the diet is what matters , not simply eliminating gluten.
Can there be risks to following a gluten-free diet?
Eliminating gluten without supervision can lead to deficiencies in fiber, B vitamins, iron, calcium, magnesium, and folate , especially if gluten-containing foods are replaced with ultra-processed, nutrient-poor versions. Furthermore, "gluten-free" products are often more expensive and, in many cases, less satiating.
Therefore, if you choose a gluten-free diet, it is recommended:
- Choose gluten-free whole grains and flours (rice, corn, quinoa, millet)
- Eat a wide variety of fruits and vegetables
- Include legumes and nuts
- Consult with a dietitian-nutritionist
What happens if there is cross-contamination?
Cross-contamination is one of the main dangers for people with celiac disease or allergies. Even a small amount of gluten can trigger symptoms or intestinal damage. Therefore, it is essential to:
- Separate utensils and preparation areas in the kitchen
- Always check product labels
- Avoid bulk products or products prepared in non-gluten-free certified environments.
At home, it's a good idea to use cutting boards, toasters, and knives specifically designed for gluten-free products. In restaurants, ask about the production process and request certified options.
Is gluten only present in foods?
No. Gluten is also found in medications, supplements, and some cosmetics . Its function is usually as an excipient or binder. If you have celiac disease or a wheat/gluten allergy, always consult your pharmacist and carefully read the package inserts.
Are there any appealing gluten-free alternatives and recipes?
Absolutely! There are more and more delicious and high-quality alternatives available. Foods like quinoa, buckwheat, millet, brown rice, polenta, and corn can be used in countless recipes.
We recommend experimenting with:
- Homemade breads made from rice or buckwheat flour
- Certified gluten-free oatmeal cookies
- Pizzas with cauliflower or polenta base
- Legume pasta (chickpeas, red lentils) or corn
- Cakes with alternative flours
Furthermore, there are currently many artisanal gluten-free products (breads, cakes, pasta, etc.), although for health reasons, it is always preferable to reduce the consumption of processed products—whether gluten-free or not—and focus on a diet based on fresh, quality products.
What to do before starting a gluten-free diet?
Before taking the plunge, it's crucial to consult a doctor or registered dietitian . Eliminating gluten without the recommended diagnostic tests can make it harder to identify celiac disease. If you decide to go gluten-free on your own, be sure to incorporate other grains and foods that provide the lost nutrients, and maintain a varied and balanced diet.
Remember: a gluten-free diet is only strictly necessary if there is a clear diagnosis . For everyone else, it offers no proven benefits and may even pose risks.
As you've seen, gluten is neither the villain nor the hero of nutrition . For the vast majority of people, consuming it as part of a balanced diet poses no risk whatsoever. Only those with celiac disease, wheat allergy, or diagnosed sensitivity must strictly avoid it. In any case, the foundation of good health remains a varied diet based on fresh, high-quality products, avoiding ultra-processed foods even if they are labeled "gluten-free." Listening to your body, always consulting a doctor when in doubt, and opting for simple and natural foods means that gluten ceases to be a source of uncertainty and becomes simply another ingredient—neither good nor bad, but only relevant depending on your health and diagnosis.
