You've just been diagnosed with celiac disease. Now what?

The very first thing you need to do is cut out all gluten from your diet. There's no such thing as being able to tolerate a "little" gluten. It's now a medical necessity for you to avoid it.

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tl;dr:

• Go 100% gluten-free, right now. There's no safe amount; a single breadcrumb can trigger immune damage even with zero symptoms. Exception: if your endoscopy hasn't happened yet, keep eating gluten so the damage is visible on the test.
• Make your kitchen safe: throw out scratched/porous gear (wood, worn cutting boards), use separate utensils, toasters, air fryers if you share a kitchen, and stop airborne flour in a shared home.
• Start simple: naturally gluten-free whole foods - rice, fruit, vegetables, meat. Skip dairy at first; be wary of butcher-counter meat and hidden gluten in sauces/seasonings.
• Read every label. Avoid wheat, barley, rye, triticale, and oats at first; only trust third-party certified "gluten-free" claims (at least in the US/Canada).
• Hold off on restaurants until you can assess packaged-food risk confidently. Then call ahead and ask how they prevent cross-contact.
• Own your follow-up: push for tTG-IgA blood tests, a DEXA bone scan, a celiac-knowledgeable dietitian, and screening for first-degree relatives.
• It's hard. Don't do it alone. Find a therapist and a celiac community. Healing takes months to years, but it does get better.

This is not medical advice. I'm not a doctor or a dietitian. I'm someone who has lived with celiac disease since 2019 and did a lot of research along the way. This guide is what worked for me and for the people I've learned from, written to help you ask better questions of your care team, not to replace it. Before you change your diet, stop a medication, or act on anything here, talk to your doctor or gastroenterologist. If you're newly diagnosed, push for a referral to a dietitian who actually knows celiac disease. If something here conflicts with what your care team tells you, follow their guidance.

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There will be a lot of emotional and social weight to this diagnosis. It's something that will stick with you for the rest of your life. It will be challenging and difficult, but there are good resources out there to help support you in this change. I know this guide seems like a lot, but it's what I do and I have been able to consistently blood-test at 0 tTG-IgA. If your endoscopy has not yet occurred, put this guide aside for now. You need to keep eating gluten to be able to show damage on the endoscopy.¹ Otherwise, read on, and we'll get into some of the details.

There is no safe amount of gluten

No amount of gluten has been proven safe for a celiac patient. Most guidance treats about 10mg per day as a conservative ceiling, and the most sensitive people react to less than that.² A single breadcrumb is able to activate your immune system and cause damage to your body. And it's important to note that damage and symptoms can be decoupled: you might not feel otherwise sick, but it's doing damage to your body regardless. This is especially important for silent/asymptomatic celiacs, who may not be aware of a gluten exposure. The stakes are high: untreated celiac can cause malnutrition, anemia, osteoporosis/osteopenia,³ infertility, nervous system disorders,⁴ other autoimmune disorders, and even an increased risk of certain types of cancer.⁵ Adherence to a strict gluten-free diet reduces the risk of all of these.⁶

Setting up a safe kitchen

When it comes to feeding yourself at home, you need to get rid of any porous kitchen equipment (wooden things come to mind) or things that are scratched up in such a way that they could hide gluten inside of them (like plastic cutting boards). If you have to share a kitchen with a non-celiac, you'll have to figure out a system to have separate utensils, cutting boards, toasters, air fryers, and other equipment. Airborne flour is another significant risk factor, so if the non-celiacs are frequent bakers, it's best for that to stop entirely. Shared ingredients and condiments are also something to avoid when you have a shared kitchen, and it's best for the entire household to go gluten-free if possible because of the continual risk of gluten cross-contact.

What to eat while you learn

The best foods to stick with when starting and learning a gluten-free diet are things that are naturally gluten-free: whole foods like rice, fruits, vegetables, or meat. Avoiding dairy at first is a good idea because newly-diagnosed celiacs often have temporary lactose intolerance — the damaged villi are what produce lactase, so it returns as they heal.⁷ One hidden risk factor that shows up with meat is that grocery stores handle meat behind the butcher counter, and there are often things like breaded chicken available or soy-marinated meat. You certainly can't have that, but you also can't know what surfaces or equipment it contacted and transferred gluten to. Exercising caution with the butcher counter at first is a good idea for this reason.

Reading food labels

Label-reading is now your best friend. In the United States and the European Union, <20 ppm of gluten is the standard in order for something to be labeled "gluten-free".⁸ In Australia and New Zealand, the threshold is "undetectable" levels of gluten.⁹ Reading labels is an article on its own, but the short version is that hidden gluten is in many things. Soy sauce, malt, seasonings, "natural flavors" - these are just some examples of things that contain or can contain gluten. You'll want to avoid wheat, barley, rye, triticale at a minimum, and oats too at least at first (and introduction of oats should only be done under supervision of a care, some celiacs - myself included - are avenin-intolerant).¹⁰ Generally avoid foods with "shared equipment" statements that are not certified by third-party certification programs (like GFCO (US), the Global Standard Gluten-Free (global), NSF (US); or the Gluten-Free Food Program(US), or the Crossed Grain Trademark (EU/UK)). Those third-party certification programs do require testing and validation of manufacturer practices to ensure that food is lower than the 20ppm limit (they do vary on levels though, check with each program individually)¹¹ and cross-contact is avoided in the manufacturing process.

Eating at restaurants

Eating at restaurants is difficult. Don't do it until you are capable of assessing risk on your own with packaged foods, because unlike packaged food, there's no real regulatory guard for restaurants saying a dish is gluten-free or not.¹² The only evidence is in a restaurant's practices, and you'll have to get used to doing legwork to understand if someplace is safe to eat at. Call places ahead of time, ask for details on how they can avoid gluten cross-contact. Ask about their preparation procedures for allergen meals. Mention celiac disease or "gluten allergy"(allergy isn't the recommended term but it does often alert people to the seriousness of the situation) when ordering to make sure restaurants take extra precautions.

Follow-up care and testing

Once you've been eating gluten-free for a while, it's good to regularly follow up with your care team. You do often have to take the initiative here, because celiac is poorly understood and many doctors will just shove you out the door with a pamphlet about celiac and say "Good luck!". They can help you understand if gluten is sneaking its way into your diet through unknown sources via blood testing (tTG-IgA, and overall IgA test), and can schedule you for a DEXA bone-density scan (30-60% of newly-diagnosed adults have low bone density).¹³ They should refer you to a dietitian who knows celiac disease — that is standard at diagnosis, not something reserved for people struggling with the diet.¹⁴ The medical staff may also want to verify that your nutrient levels are approaching normal as you heal, since the damage to your intestine caused by gluten likely impacted your ability to absorb them before. It's good to also have your first-degree relatives screened (i.e. immediate blood family); blood relatives have a 1 in 10 risk of having celiac disease versus 1 in 100 in the general population.¹⁵ Ask about any or all of these things when you see your care team.

Grief, community, and getting better

There's no question that celiac disease is difficult. Humans have bonded over food for millennia, and the social isolation that stems from the new difficulty you have in sharing food with others is real. Organizations like Beyond Celiac (USA), the Celiac Disease Foundation (USA), the Canadian Celiac Association, Coeliac UK, the Association of European Coeliac Societies (AOECS), Coeliac Australia, and Coeliac New Zealand are just a few of the support resources available to you as a newly-diagnosed celiac.¹⁶ The healing you go through is potentially months-to-years long, depending on how much damage your intestines had and how much incidental gluten exposure you have, but it will get better.¹⁷ Find a therapist to help you deal with the grief of losing foods and other related issues. Find people in your community (there are plenty of locale-specific Facebook groups that are celiac-focused) to befriend.

My experience

I was diagnosed in 2019 at the age of thirty, and the first few months to years were really hard. I remember being totally clueless about what to do and where to look. Before I went completely on the gluten-free diet, I had a "last hurrah" of all of the gluten things that I loved to eat. I'm happy to say that I've found replacements for every single one of those things - and I am confident that you will too. If you put in the work, you will feel better, and it'll pay off for the rest of your life.

--Tom, diagnosed with celiac disease in 2019, GFMapper founder. Not a medical professional.

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