GFCF diet — Read the ingredients, not the marketing claims on the packaging!
Gluten-free and casein-free diet — is a dietary strategy that involves the complete elimination of gluten (a grain protein) and casein (a milk protein) from the diet.
We often use it as part of a comprehensive approach in children with autism spectrum disorder (ASD), PANS/PANDAS/PITANDS, neurodevelopmental disorders, and other neuroimmune conditions.
Main goals of the GFCF diet
1) Reduce neuroinflammation in the brain
Gluten and casein (milk protein) can trigger an immune response. This leads to microglial activation, increased pro-inflammatory cytokines, and enhanced neuroinflammation.
In patients with neuroimmune disorders, this may affect behavior, concentration, sleep, and anxiety.
2) Improve gut health (gut–brain axis)
Children with ASD often have dysbiosis, increased intestinal permeability, and enzyme deficiencies.
Eliminating gluten and casein may reduce mucosal inflammation, improve the microbiome, normalize digestion, and decrease gastrointestinal symptoms (bloating, constipation, diarrhea, pain).
3) Reduce immune burden
Some children have antibodies to gliadin, antibodies to casein, and cross-reactivity with brain tissues.
Eliminating these proteins may reduce autoimmune activation and alleviate symptoms of PANS/PANDAS/PITANDS, ASD, and neurodevelopmental disorders.
Which foods should be considered?
Gluten
Not allowed: wheat (all types: spelt, kamut, bulgur, semolina), rye, barley (including pearl barley), triticale, burger buns, flatbreads, refined flour bread, wheat pasta, crackers, breading, cookies, wafers, biscuits, cakes, muffins, pancakes (regular), instant cereals (often contain gluten), sausages with starch (wheat!), soy sauce (contains wheat), store-bought sauces, ketchups, dressings, chocolate bars, candies with crispy additives (often wheat-based).
Casein
Not allowed: milk (cow, goat, sheep — ALL), infant formulas based on milk protein, yogurts, ryazhenka, kefir, cream, sour cream, butter (contains casein!), cheese (hard, soft, processed), mozzarella, ricotta, mascarpone, ice cream, condensed milk, milk and white chocolate, whey (casein may also be present), sodium caseinate, calcium caseinate in ingredients.
Allowed and restricted foods
Proteins
Allowed: meat: chicken, turkey, rabbit, duck; fish: hake, cod, mackerel; eggs (if no allergy); seafood; legumes: lentils, chickpeas, beans; gluten-free sausages (labeled “gluten free”, “dairy-free”).
Not allowed: breaded meat; sausages with wheat starch; store-bought fish sticks.
Vegetables and fruits
Not allowed: pickled/canned vegetables with added starches or unspecified additives and colorings.
Preferred: peaches, berries (blueberries, raspberries, strawberries, etc.), apples, broccoli.
!NOTE: daily fruit intake should be calculated at 20–25 g/kg body weight.
Grains — the basis of a gluten-free diet
Allowed: rice (white, brown, jasmine, basmati), buckwheat (green or roasted), corn grits, quinoa, amaranth, sorghum, tapioca, millet.
Not allowed: semolina, pearl barley, bulgur, couscous, wheat groats, barley groats.
Bread and baked goods
Allowed: gluten-free bread (GF label); baked goods made from rice flour, corn flour, buckwheat flour, tapioca starch, almond flour.
Not allowed: any wheat, rye, or barley flour; ready-made “fitness” crispbreads (often contain wheat!).
Fats
Allowed: olive oil, GHEE (clarified butter, if tolerated — contains minimal casein), avocado, seeds (sesame, pumpkin, sunflower).
Not allowed: regular butter, spreads, margarines containing dairy components.
Dairy alternatives
Almond milk, rice milk, nut-based creams, coconut yogurts, plant-based cheeses (casein-free!).
Sweets
Allowed: fruit pastille, fruit chips, dark chocolate (one piece, dairy-free!), homemade desserts with plant-based milk.
Not allowed: milk chocolate, wafers (always contain gluten + casein), bars (often contain milk).
Sauces and seasonings
Allowed: olive oil, lemon, basil.
Not allowed: soy sauce (contains wheat), ketchups with thickeners, store-bought “kids’” sauces.
Ingredients to watch for on labels
Hidden gluten
Avoid terms: “starch” without specification (unless labeled corn or potato), “modified starch”, “vegetable protein”, “dietary fiber”, “barley grass”, “malt”, “malt extract”, “thickener E…”, “flavoring” / “coloring” without specification, “emulsifier” without clarification.
Hidden casein
Avoid terms: caseinate (any type), milk protein, whey, casein, caseinate, lactalbumin, milk fats (may contain protein traces), lactose (may contain traces of casein), cream, dried milk in ingredients.
Common mistakes parents make
Reading only the first line of ingredients.
Casein is often listed at the end, and gluten may be hidden in thickeners.
Using “lactose-free” products.
!Lactose-free ≠ casein-free. These products still contain casein.
Be cautious with restaurant food.
Breading almost always contains gluten.
Cross-contamination issues.
Using the same boards or utensils as for regular foods.
How to read labels?
Do not choose products if they contain: wheat, barley, rye, gluten, malt, oats (unless labeled GF), casein, whey, skim milk, milk solids.
Likely safe if labeled: gluten-free, dairy-free, plant-based, vegan (but always check the ingredients!).
Not allowed even if “vegan”: products with caseinates or “milk-like” products containing milk protein as a stabilizer.
Where to find gluten-free / dairy-free products?
These are usually available in online stores and specialty shops offering imported goods, gluten-free, or lactose-free products, including ready-made items or ingredients for home cooking.
In summary, it is important to understand that the GFCF diet is not just about eliminating a few foods. It is part of a comprehensive therapeutic approach that considers the immune system, gut health, metabolism, and neuroinflammatory processes.
In clinical practice, we often observe that a properly implemented gluten-free and casein-free diet can help reduce neuroinflammation, improve behavioral symptoms, sleep, concentration, and digestive health in children with ASD, PANS/PANDAS, developmental delays, and other neuroimmune conditions.
At the same time, it is important that this diet is introduced correctly, under supervision, taking into account possible deficiencies, individual tolerance, and the child’s overall metabolic profile.
In our clinic, this approach is used as part of a comprehensive neuroimmunological treatment strategy, alongside laboratory diagnostics, microbiome correction, metabolic support, and individualized therapeutic protocols.
