Iron, Folate, B12 and Vitamin D: What the Coeliac Results Letter Means Where You Live

Learn pillar · Coeliac health beyond the diet · Last verified 2026-09-13 · International English (UK · Ireland · US · Canada · Australia · New Zealand; follow-up notes for EU · Germany · Italy)

Low iron, folate, vitamin B12 and vitamin D are common at coeliac diagnosis because the damaged upper small intestine absorbs them poorly — not because of anything you or your family did. Most levels recover on the gluten-free diet as the gut heals, and every guideline we read expects a blood check at diagnosis and a repeat within six to twelve months. But there is a second reason the risk stays with you after the gut has healed, and it depends on which country you shop in: in the US, Canada, Australia and New Zealand, and in the UK from December 2026, the ordinary wheat flour you just gave up was carrying added vitamins and iron by law — and gluten-free products are not required to carry them. In Ireland, Germany and Italy there is no such law, so the gap is one of the grain rather than the rulebook. Here is what the numbers are, why they were low, what the next year usually looks like, and who runs the follow-up where you live.

This is education, not diagnosis. Your results belong with the doctor, paediatric team or dietitian who ordered them — this piece explains what the letter means and what usually happens next, so that conversation is easier.

The short answer, by market

• Everywhere: a low ferritin, folate, B12 or vitamin D four weeks into the diet is the starting line, not the diet failing. It was low before the diet had a chance. A supplement is a decision for the clinician who has the numbers, never a default.
• US and Canada: “enriched” white flour — the flour behind most white bread, pasta and cereal — must by law contain iron, folic acid, thiamin, riboflavin and niacin. Cutting wheat removes that vehicle, and gluten-free flours and products are not required to replace it.
• UK: non-wholemeal wheat flour must by law contain added iron, calcium, thiamin and niacin — and folic acid becomes a legal requirement on 13 December 2026, with some fortified products already on shelves. Gluten-free flours and products sit outside the rule.
• Ireland: no legal requirement to fortify flour at all — though much of Ireland’s flour is milled in the UK, so fortified flour reaches Irish bread in practice.
• Australia and New Zealand: wheat flour for bread-making must contain folic acid (organic flour exempt), and bread must be made with iodised salt. Gluten-free bread is outside the folic-acid rule.
• Germany, Italy and most of the EU: no general mandatory flour fortification. The baseline is different — nobody is losing a fortified staple, but there is no fortified staple to fall back on either, and the rice, maize and potato starches that replace wheat carry fewer micronutrients of their own.

Why the numbers are low at diagnosis

Nutrient	Why it can run low on a gluten-free diet	What to check
Iron (ferritin)	Absorbed in the damaged upper small intestine (duodenum and jejunum); around a quarter of adults are iron deficient at diagnosis, and iron is the slowest value to recover — still low in 14–41% of treated adults in the pooled studies.	Ferritin at diagnosis and a repeat within six to twelve months. Vitamin C at the same meal improves plant iron; tea and coffee reduce it.
Folate	Taken up in the same upper stretch of gut. And in the US, Canada, Australia and New Zealand — and the UK from 13 December 2026 — folic acid is added to wheat flour by law, so going gluten-free steps out of that fortified staple.	Folate at diagnosis, repeated until it is back in range.
Vitamin B12	Absorbed further down, in the last part of the ileum, so it tends to drop less often and less far than iron; it generally normalises on the diet.	Vitamin B12 at diagnosis (US, Canadian and Australian lists include it routinely).
Vitamin D	A fat-soluble vitamin taken up in the upper small intestine; it can stay low even after the gut lining heals, and it regulates calcium and phosphate for bones.	Tested at diagnosis in the US, Canada and Australia; in the UK and Italy only when there is a reason.
Flour-fortification gap	Wheat flour carries added iron and folic acid by law in the US, Canada, Australia and New Zealand — and the UK from 13 December 2026 — but gluten-free flours and products are outside the rule everywhere. In Ireland, Germany, Italy and most of the EU there is no such law, so the gap is one of the grain rather than the rulebook.	Know which programme, if any, you have just left, and build the plate from naturally gluten-free whole foods, with the substitute loaf as the side rather than the base.

Untreated coeliac disease flattens the lining of the small intestine, and the stretch that takes the hit hardest — the duodenum and jejunum, just after the stomach — is exactly where iron, folate and calcium are absorbed, and where the fat-soluble vitamins, vitamin D among them, are taken up. Vitamin B12 is absorbed further down, in the last part of the ileum, which is why B12 tends to drop less often and less far than iron. (Kreutz et al., Nutrients 2020, last verified 2026-09-02.)

The scale of it, from the same 2020 review that pooled the published studies: at diagnosis, iron deficiency was reported in 6–82% of adults and 12–82% of children, folate deficiency in 11–75% of adults and 14–31% of children, vitamin D deficiency in 5–88% of adults and up to 70% of children, and vitamin B12 deficiency in 5–19% of adults and 1–14% of children. The ranges are wide because the studies differ; the direction is not in doubt. Coeliac UK puts the adult iron figure plainly: around a quarter of adults are iron deficient when first diagnosed, because “the area of the gut where iron is absorbed is damaged”. (Coeliac UK iron leaflet, last verified 2026-09-02.)

For children, the European paediatric society ESPGHAN adds the piece parents most want to know: anaemia is found in 12–24% of children with untreated coeliac disease, usually from iron, sometimes from B12 or folate — and in 84–96% of cases it improves or recovers on the gluten-free diet. (ESPGHAN 2022, last verified 2026-09-02.)

This part is the same in every country. The next part is not.

The second reason — and it depends on where you shop

Here is what the results letter does not say. Swapping bread for gluten-free bread does not swap like for like, and in some countries the difference is written into law.

Governments fortify staple foods to close population-wide gaps: folic acid to prevent neural tube defects in pregnancy, iron against anaemia, B vitamins and calcium because white flour loses them in milling. Where that programme rides on wheat flour, a person who stops eating wheat steps out of the programme on the day of diagnosis — and the gluten-free loaf that replaces it is built on rice, maize, potato or tapioca starch, which the fortification rule was never written for. (Mitchell et al., Current Developments in Nutrition 2019, last verified 2026-09-13.)

So the deficiency risk after diagnosis has two parts: a healing gut, which is the same everywhere, and a fortification gap, which is not.

Market by market

• United States. Flour sold as “enriched” must by federal standard contain thiamin, riboflavin, niacin, folic acid and iron; calcium is optional. That is the flour most white bread, pasta and breakfast cereal is made from. (21 CFR 137.165, last verified 2026-09-13.) The rule attaches to wheat flour and to nothing else, so gluten-free products fall outside it. A 2019 paper in Current Developments in Nutrition said it in one sentence: “with the exception of rice flour made from enriched white rice or corn masa that is voluntarily fortified, many of the gluten-free alternative flours are not required to be fortified with folic acid.” (Mitchell et al. 2019, last verified 2026-09-13.) The US Government’s own patient guidance draws the practical conclusion: start a gluten-free diet without professional help and “your diet may not provide enough of the nutrients you need, such as fiber, iron, and calcium”. (NIDDK, last verified 2026-09-13.)
• Canada. The rule is broader than in the US: all white flour sold in Canada for food use “must be enriched” with thiamin, riboflavin, niacin, folic acid and iron, and every food containing white flour — bread, cookies, pastries — must be made from it. The only exemption is white flour sold to make gluten or starch. (Food and Drug Regulations B.13.001; CFIA guidance, last verified 2026-09-13.) Gluten-free flours are not white wheat flour, so the mandate does not reach them.
• United Kingdom. Flour milled from common wheat must by law contain added iron, calcium carbonate, thiamin and niacin; wholemeal flour is exempt, and the duty covers wheat flour “and no other cereal” — so rice, maize and potato starches fall outside it. (Bread and Flour Regulations 1998, reg 4, last verified 2026-09-02.) From 13 December 2026 the same non-wholemeal wheat flour must also contain folic acid, under amending regulations passed for England, Scotland, Wales and Northern Ireland; the UK Government expected some products made with folic-acid-fortified flour on shelves “from autumn 2025”, ahead of the legal date. (SI 2024/1162; GOV.UK “Folic acid”, updated 10 July 2026 — last verified 2026-09-13.) For a coeliac household the arithmetic is simple: the fortified staple is about to carry one more nutrient, and the gluten-free substitute still carries none of them by law.
• Ireland. “There is no legal requirement to fortify flour in the Republic of Ireland.” (FSAI, last verified 2026-09-13.) But Ireland imports roughly seventy percent of its flour from the UK, so the FSAI expects UK-fortified flour to reach Irish bread, biscuits, cakes and pastries after December 2026 — in practice, then, an Irish wheat-eater may be inside the UK’s programme without a law of their own. The Coeliac Society of Ireland’s clinical page states the gluten-free side of it directly: gluten-free foods “have been shown to be lower in thiamin, riboflavin, niacin, folate, iron and dietary fibre” because they “tend not to be fortified and tend to be refined”. (coeliac.ie, last verified 2026-09-13.)
• Australia and New Zealand. Both countries work from the same Food Standards Code. In New Zealand, as in Australia, millers are required to add folic acid to bread-making wheat flour — in Australia since 2009 — with organic flour exempt; breads made from non-wheat cereals are also outside the requirement, though a manufacturer may fortify them voluntarily. (FSANZ, last verified 2026-09-13.) Separately, Australian bread must be made with iodised salt, with organic bread and home bread mixes the only exemptions FSANZ lists. (FSANZ iodine page, last verified 2026-09-13.) The two rules are built differently: the folic-acid duty is attached to wheat flour, so a gluten-free loaf sits outside it; the iodine duty is attached to bread as a category.
• Germany, Italy and most of the EU. EU law harmonises the voluntary addition of vitamins and minerals to food and leaves any mandatory scheme as a national matter. (Regulation (EC) 1925/2006, recital 3 and Article 11, last verified 2026-09-13.) Germany’s federal risk-assessment institute put the national position in one sentence in 2017: mandatory folic-acid fortification of flour “existiert in Deutschland und der EU derzeit nicht” — does not currently exist in Germany or the EU. (BfR Stellungnahme 027/2017, last verified 2026-09-13.) Italy’s national health institute says the same for Italy: only voluntary fortification is permitted, and the foods that carry it are breakfast cereals, some biscuits and snacks, some juices and infant products — not the everyday loaf. (ISS EpiCentro, 2016, last verified 2026-09-13.) So in these markets nobody is stepping out of a programme at diagnosis. The gap is a matter of the grain, and the German coeliac guideline says as much: rice, maize and potato contain less protein, fibre and fewer micronutrients than the cereals they replace, and a gluten-free diet tends toward less fibre and more starch, sugar and fat. (DGVS S2k 2021/22, last verified 2026-09-02.)

The product studies agree across borders. A 2018 UK survey of 679 gluten-free and 1,045 regular products found more gluten-free foods classed high or medium for fat, saturated fat, sugar and salt, gluten-free bread and flour in particular high in fat and sugar, gluten-free items more often lower in fibre and protein — and 159% more expensive. A 2016 review in Clinical Nutrition found the gluten-free diet “poor in alimentary fiber” and low in vitamin D, B12, folate, iron, zinc, magnesium and calcium. A 2005 US survey of adults on a strict gluten-free diet found fewer than half the women reaching recommended fibre and iron. (Fry et al. 2018; Vici et al. 2016; Thompson et al. 2005 — all last verified 2026-09-02.)

None of this is a reason to fear the free-from aisle. It is a reason to know which programme you have just left, if any — and to build the plate from naturally gluten-free whole foods so that the substitute loaf is the side, not the base.

What the checks look like — and who runs them where

At diagnosis. Every guideline we read wants a baseline before or at the start of the diet. Germany’s S2k guideline spells the panel out: full blood count, liver enzymes, alkaline phosphatase, TSH, iron status, folate, vitamin B12, vitamin D and, where indicated, calcium and parathyroid hormone. ESPGHAN’s paediatric position paper asks for a full blood count, “micronutritional status (eg, hemoglobin, iron, vitamin B12, and vitamin D levels)” and ALT, and then: “Any abnormality should be followed and deficiencies corrected until normalization.” (DGVS S2k; ESPGHAN 2022 — last verified 2026-09-02.)

The first follow-up. For children, ESPGHAN puts the first visit at three to six months after diagnosis, then every six months until the coeliac antibodies normalise, then every 12–24 months. Adults in most systems land in the same window — three to six months, then yearly. (ESPGHAN 2022, last verified 2026-09-02.)

Who runs it, by country. This is where the editions differ, and where a family moving between systems gets confused. The national coeliac societies below are signposts to the local pathway — the medical facts come from the guidelines, not the societies.

• UK. NICE keeps the annual review simple: weight and height, symptoms, adherence, whether specialist dietetic advice is needed — and then, if there are concerns, “the need for specific blood tests” and a bone scan. The British Society of Gastroenterology’s adult guideline asks for “annual haematological and biochemical profiles”: full blood count, ferritin, folate, vitamin B12, calcium and alkaline phosphatase, with thyroid function alongside. (NICE NG20; BSG 2014 — last verified 2026-09-02.) Coeliac UK’s version for families: children followed up six to twelve months after diagnosis, then yearly; adults at an annual review; a check-up may include full blood count, calcium, ferritin, folate, vitamin B12, coeliac antibodies, thyroid and liver tests; children should have “ongoing monitoring with an experienced paediatric dietitian”, and the charity runs a dietitian helpline. Vitamin D is not on any UK list as a routine item — it is tested when there is a reason. (Coeliac UK check-ups, last verified 2026-09-13.)
• Ireland. The Coeliac Society of Ireland’s clinical page names the three follow-up bloods the Irish guidance expects — serum ferritin, vitamin B12 and folate, “all of which are deficiencies commonly found in newly diagnosed coeliacs” — and is blunt about the dietitian: “a dietary review by a dietitian is paramount”. (coeliac.ie, last verified 2026-09-13.)
• United States. The Celiac Disease Foundation’s follow-up page: see your physician three to six months after diagnosis and annually thereafter; routine labs include a complete blood count, iron studies, vitamin B studies, thyroid function, liver enzymes, calcium, phosphate, 25-hydroxy vitamin D and zinc; refer to “a registered dietitian with expertise in celiac disease and the gluten-free diet”. (celiac.org, last verified 2026-09-13.) The NIDDK says the same in patient language: “Your doctor or a registered dietitian can help you plan a healthy, balanced diet to make sure that you get the nutrients you need.” (NIDDK, last verified 2026-09-13.) Who pays for that dietitian is a question for your insurer — we have no source that settles it and will not pretend to.
• Canada. The Canadian Celiac Association’s clinical page: follow-up “usually happens 3 to 6 months after diagnosis with a doctor and a dietitian skilled in celiac disease”, then every six to twelve months until the blood tests return to normal, then every 12–24 months; iron studies, vitamin D, folate and B12 at diagnosis and, “if low at diagnosis, in follow up”. (celiac.ca, last verified 2026-09-13.) Health Canada’s own page keeps it to one line: regular follow-up with your family doctor. (canada.ca, last verified 2026-09-13.)
• Australia. Coeliac Australia: reviews every three to six months “until you are well”, then every one to two years; the initial screen includes iron studies, B12, folate and vitamin D, repeated as a “nutrient screen” at each review with thyroid and liver tests; see an Accredited Practising Dietitian; adults get a bone density scan at diagnosis. (coeliac.org.au, last verified 2026-09-13.)
• New Zealand. The primary-care guidance from bpacnz: follow-up “ideally every three to six months” in the first year, then annually once established; repeat “ferritin, folate and vitamin B12, particularly if there were abnormal biochemistries at diagnosis”; offer a dietitian referral if the gastroenterologist has not already; if deficiencies have not improved after a year on the diet, consider supplementation. (bpac.org.nz, August 2022, last verified 2026-09-13.) Coeliac New Zealand is the local signpost.
• Germany. The S2k follow-up rule is conditional: where a deficiency was found at diagnosis, the check-ups repeat the full blood count, iron parameters, 25-OH vitamin D, folate, vitamin B12 and TSH, plus liver enzymes if they were raised — first check within six months, then annually, with stable adults able to stretch to two years. (DGVS S2k, last verified 2026-09-02.) The DZG’s plain-language page lists the same baseline set — ferritin, folate, B12, calcium, vitamin D, GPT, TSH, possibly zinc — and explains that dietetic counselling is partly reimbursed by health insurers on a doctor’s certificate of necessity. (dzg-online.de, last verified 2026-09-13.)
• Italy. The national protocol is the leanest: at every check, a medical visit, a dietary assessment, a full blood count and the anti-tTG antibodies, first within six to twelve months, then every one to two years. Iron and folate are tested at the first follow-up and repeated only if abnormal, “until normalisation”. Vitamin D and B12 are not named as routine items, and the protocol says what not to do: no bone scan in children, no repeating the antibodies too early. (Ministero della Salute protocol, GU 191/2015, last verified 2026-09-02.) Around that protocol sits infrastructure the other markets do not have: under the LEA, the specialist visit with dietary interview and the anti-tTG test are exempt from co-payment every two years, on a prescription from the family doctor or paediatrician; gluten-free substitute foods are provided free through the health service up to a monthly cap set by age and sex, spent as vouchers — paper, card or increasingly digital — in pharmacies, specialist shops and, in many regions, supermarkets; and public school, hospital and workplace canteens must serve a gluten-free meal on request. (AIC “Esenzioni e prestazioni”, “Assistenza alla dieta”, and the Legge 123/2005 FAQ — last verified 2026-09-13.) The AIC pages are the signpost; the rules themselves are the Ministry’s.

Bones, briefly. Vitamin D matters because it regulates calcium and phosphate for bones, teeth and muscles; a lasting shortfall means rickets in children and osteomalacia in adults. (NHS, last verified 2026-09-02.) Routine bone-density scanning is not recommended for children — ESPGHAN’s reasoning is that in most children one year of strict diet is enough to restore bone mass. Adult rules differ by country (UK: on concern; Germany: from age 50, earlier with risk factors; Italy: once after eighteen months of diet; Australia: at diagnosis), and they are for the adult clinic to apply. (ESPGHAN 2022; NICE NG20; S2k; GU 191/2015 — last verified 2026-09-02; Coeliac Australia, last verified 2026-09-13.)

How they recover on the diet

The gut heals from the top down, and the numbers follow. Coeliac UK: once you have been on the diet for some time, “your gut will begin to heal and your iron levels should increase as your iron absorption improves”. The 2020 review found that vitamin B12, folate, calcium and magnesium generally normalise on the diet; iron is the slow one, still low in 14–41% of treated adults in the studies pooled, and vitamin D remained low in a share of treated patients too. The German guideline notes that folate, B12 and vitamin D shortfalls can persist even after the gut lining has recovered — which is exactly why the re-test exists, and exactly where the fortification gap above does its quiet work. (Coeliac UK iron leaflet; Kreutz 2020; DGVS S2k — last verified 2026-09-02.)

Children are faster. ESPGHAN expects catch-up growth in weight and height “within six months” of starting the diet for a child who was growing poorly, and an adequate response to anaemia within a year; the German guideline says malnutrition in children often improves within weeks. If a child has not caught up in height a year into a strict diet, ESPGHAN asks for further investigation, not a stricter diet. (ESPGHAN 2022; DGVS S2k — last verified 2026-09-02.)

Two habits help the iron along, and both come from the dietitians rather than a bottle: tannins in tea and polyphenols in coffee and cocoa reduce the absorption of plant iron, and vitamin C-rich food at the same meal improves it. (Coeliac UK iron leaflet, last verified 2026-09-02.)

When to supplement — and who decides

Every source here says the same thing in different accents: a supplement is a response to a result, prescribed or recommended by the clinician who has the numbers.

• NICE tells patients to “seek advice from a member of their healthcare team” before buying over-the-counter vitamins or minerals, and that they “may need to take specific supplements such as calcium or vitamin D if their dietary intake is insufficient”. (NICE NG20, last verified 2026-09-02.)
• Coeliac UK: “If you’re diagnosed with iron deficiency, iron supplements may be recommended by your GP or dietitian.” (Coeliac UK iron leaflet, last verified 2026-09-02.)
• The US Celiac Disease Foundation’s clinician page goes further than the European guidelines — it suggests “a gluten-free multivitamin and additional supplementation as needed” — and it is worth reading that in the light of the US fortification gap above, where the everyday loaf has stopped delivering folic acid and iron by law. (celiac.org, last verified 2026-09-13.) It is still a recommendation for your physician to make, not a shopping instruction.
• The German guideline’s wording is almost blunt: apart from borderline values or proven deficits, “a general substitution with micronutrients is not required” — and any supplement used must itself be gluten-free. (DGVS S2k, last verified 2026-09-02.)
• For young children ESPGHAN takes the opposite position for one specific situation, and it is worth knowing why: a young child with anaemia from iron, folate or B12 deficiency should receive supplementation in addition to the diet, “since improvement over time may take too long” during a critical period of brain development and catch-up growth. Iron stores that are low without anaemia can be watched on the diet alone as long as they are improving. (ESPGHAN 2022, last verified 2026-09-02.)
• The 2020 review is candid that the evidence on how well supplements work in coeliac disease is thin — one more reason the call sits with the clinician, not the supermarket aisle. (Kreutz 2020, last verified 2026-09-02.)

One line from the NHS belongs in every household with small children, in every country: keep iron tablets out of reach — “an overdose of iron in a young child can be fatal”. (NHS, last verified 2026-09-13.)

Building the plate — the part that is the same everywhere

Whatever your country’s flour law says, the answer on the plate is the same: pulses, eggs, meat and fish, dark greens, nuts and seeds, and wholegrain gluten-free flours like buckwheat and teff — with the substitute loaf as the side, not the base. Coeliac UK’s advice for when you do buy gluten-free bread, flour or pasta is to pick the brown, multigrain or fibre versions. (Coeliac UK fibre page, last verified 2026-09-02.) In the US and Canada, some rice flours and corn masa are voluntarily fortified, and an “enriched” line on a gluten-free pack is worth a second look. (Mitchell et al. 2019, last verified 2026-09-13.)

What to do — five lines

1. Expect a baseline blood test at diagnosis (blood count, iron/ferritin, folate, B12, vitamin D in most systems) and a repeat within six to twelve months; ask for the list your clinic uses — it differs by country.
2. Read a low value as a starting point, not a verdict — absorption was poor before the diet; re-testing shows the trend.
3. Know which fortification programme you just left, if any: US, Canada, Australia, New Zealand — and the UK from December 2026 — put folic acid (and, in North America and the UK, iron) into wheat flour by law; gluten-free products are outside it everywhere.
4. No supplement without a result and a clinician’s say-so — and if one is prescribed, ask for a gluten-free product and keep iron tablets out of children’s reach.
5. Ask for a dietitian appointment — every guideline here expects one; in Germany part of the cost is reimbursed, and in Italy the follow-up visit is co-payment-exempt.

When to talk to a doctor

Bring the results letter to the follow-up and ask three things: which values were low, when they will be re-tested, and whether anything needs treating now. Go back sooner if a child is not catching up in growth or energy on a strict diet, if tiredness, breathlessness or pallor persist, or if you are tempted to start a supplement on your own. And if a value stays low despite a strict diet and normal antibodies, the guidelines say the same thing: look for another cause — that is a doctor’s job, not a stricter diet’s.

FAQ

Which blood tests should a newly diagnosed coeliac expect?
A full blood count, iron/ferritin, folate, vitamin B12, and in most systems vitamin D and liver enzymes at diagnosis, with the coeliac antibodies at each follow-up. Anything abnormal is repeated until it is back in range. The exact list varies by country — UK and Italian protocols do not test vitamin D routinely; US, Canadian and Australian guidance does — so ask for yours.

Why are iron and vitamin D low at coeliac diagnosis?
Because the damaged upper small intestine — where iron, folate, calcium and fat-soluble vitamins are absorbed — cannot take them up properly. Levels usually recover as the gut heals on the gluten-free diet; iron is the slowest.

Why does my country’s flour law matter to my blood results?
In the US, Canada, Australia and New Zealand, and in the UK from 13 December 2026, wheat flour or bread-making flour must carry added folic acid (and in North America and the UK, iron and B vitamins) by law. Gluten-free flours and products are not covered, so going gluten-free removes a fortified staple and replaces it with an unfortified one. In Ireland, Germany, Italy and most of the EU there is no general mandate, so the gap is about what the substitute grains naturally contain, not about a programme you left.

Are gluten-free breads fortified anywhere?
Not by law in any of the markets in this guide. Some manufacturers fortify voluntarily — in the US and Canada, some rice flours and corn masa carry an “enriched” line — so the pack is worth reading, but it is the exception.

Should I give my coeliac child vitamin supplements?
Only if the doctor or dietitian recommends them after seeing the results. Guidelines advise against routine supplementation without a proven deficit, with one exception: young children with anaemia are usually treated alongside the diet, because waiting can take too long at that age.

Who follows me up, and do I pay?
That depends on where you live: an annual GP or clinic review in the UK; a physician plus registered dietitian in the US and Canada; three-to-six-monthly reviews until well in Australia and New Zealand; a conditional lab panel in Germany with dietetic counselling partly reimbursed; and in Italy a co-payment-exempt specialist visit every two years alongside the gluten-free food vouchers. Your national coeliac society can point you to the local pathway — the medical decisions stay with your clinician.

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Related on How to Gluten Free

• Beginners hub — the first weeks after diagnosis, one step at a time
• Cross-Contact 101 — the other half of “strict diet” that the blood tests are measuring
• Oats and Wheat Starch: Reading the Gluten-Free Fine Print — the same six markets, the same habit of checking which rule you are standing under
• Flour Library — buckwheat, teff and the other wholegrain gluten-free flours that carry fibre and minerals of their own
• The Coeliac Alphabet: Autoimmune — why coeliac disease is a medical condition, not a lifestyle choice
• Our methodology — how we source, date and re-check the claims on this page

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Sources

• Kreutz JM, Adriaanse MPM, van der Ploeg EMC, Vreugdenhil ACE. Narrative Review: Nutrient Deficiencies in Adults and Children with Treated and Untreated Celiac Disease. Nutrients 2020;12(2):500. Backs: absorption sites, prevalence ranges, recovery pattern, thin supplement evidence. — https://www.ebi.ac.uk/europepmc/webservices/rest/PMC7071237/fullTextXML
• Coeliac UK, “Iron and iron deficiency” (leaflet PDF). Backs: quarter-of-adults figure, healing/absorption line, tea-coffee-vitamin C, GP/dietitian supplement line. — https://www.coeliac.org.uk/app/uploads/iron-and-iron-deficiency-may-2024.pdf
• Coeliac UK, “Check-ups.” Backs: UK follow-up schedule, blood-test list, paediatric dietitian, helpline. — https://www.coeliac.org.uk/living-with-coeliac-disease/health-and-wellbeing/care-after-diagnosis/check-ups/
• Coeliac UK, “Fibre.” Backs: choose brown/multigrain/fibre GF versions. — https://www.coeliac.org.uk/living-with-coeliac-disease/health-and-wellbeing/keeping-healthy/keeping-a-balanced-diet/fibre/
• Mearin ML et al. ESPGHAN Position Paper on Management and Follow-up of Children and Adolescents With Celiac Disease. JPGN 2022;75(3):369–386. Backs: paediatric anaemia figures, baseline panel, follow-up timing, bone-scan position, young-child supplementation rule, catch-up growth. — https://www.espghan.org/knowledge-center/publications/Gastroenterology/ESPGHAN-Position-Paper-on-Follow-up-of-Coeliac-Disease-
• Felber J et al. Aktualisierte S2k-Leitlinie Zöliakie der DGVS, AWMF 021-021. Z Gastroenterol 2022;60:790–856. Backs: German baseline and follow-up panels, timing, substitution rule, grain-quality statement, persistence of shortfalls. — https://register.awmf.org/assets/guidelines/021-021l_S2k_Zoeliakie_2022-05.pdf
• NICE NG20, Coeliac disease: recognition, assessment and management (via NCBI Bookshelf; nice.org.uk returns 403). Backs: annual review contents, supplement advice. — https://www.ncbi.nlm.nih.gov/books/NBK343373/
• Ludvigsson JF et al. Diagnosis and management of adult coeliac disease: guidelines from the British Society of Gastroenterology. Gut 2014. Backs: annual haematological/biochemical profile. — https://pmc.ncbi.nlm.nih.gov/articles/PMC4112432/
• NHS, “Vitamin D.” Backs: vitamin D physiology line. — https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-d/
• NHS, “Iron deficiency anaemia.” Backs: iron-overdose warning. — https://www.nhs.uk/conditions/iron-deficiency-anaemia/
• NIDDK (NIH), “Eating, Diet, & Nutrition for Celiac Disease.” Backs: doctor/registered-dietitian line; fibre-iron-calcium caution. — https://www.niddk.nih.gov/health-information/digestive-diseases/celiac-disease/eating-diet-nutrition
• 21 CFR § 137.165 Enriched flour (via Cornell LII). Backs: US enrichment nutrients and scope. — https://www.law.cornell.edu/cfr/text/21/137.165
• Mitchell S, Gomes A, Zelig R, Parker A. Not All Grains Are Created Equal: Gluten-Free Products Not Included in Mandatory Folate Fortification. Curr Dev Nutr 2019;3(5):nzz020. PMID 31093597. Backs: US gluten-free flours outside the folate mandate; voluntary exceptions. — https://pmc.ncbi.nlm.nih.gov/articles/PMC6509050/
• Food and Drug Regulations (Canada), C.R.C., c. 870, s. B.13.001. Backs: Canadian white-flour enrichment nutrients and amounts. — https://laws-lois.justice.gc.ca/eng/regulations/C.R.C.,_c._870/section-B.13.001.html
• Canadian Food Inspection Agency, “Prohibition against the sale of unenriched white flour and products containing unenriched flour.” Backs: all-white-flour scope, gluten/starch exemption. — https://inspection.canada.ca/en/food-labels/labelling/industry/grain-and-bakery-products/unenriched-flour
• The Bread and Flour Regulations 1998, SI 1998/141, regs 2 and 4. Backs: UK iron/calcium/thiamin/niacin duty, wholemeal exemption, wheat-only scope. — https://www.legislation.gov.uk/uksi/1998/141/regulation/2 · https://www.legislation.gov.uk/uksi/1998/141/regulation/4
• The Bread and Flour (Amendment) (England) Regulations 2024, SI 2024/1162. Backs: folic acid 0.25 mg/100 g, exemptions, 13 December 2026 commencement. — https://www.legislation.gov.uk/uksi/2024/1162/made
• GOV.UK, “Folic acid” (updated 10 July 2026). Backs: four-nation coverage, December 2026 legal date, autumn-2025 early products. — https://www.gov.uk/government/publications/folic-acid/folic-acid
• Food Safety Authority of Ireland, “UK flour fortified with folic acid Q&A.” Backs: no legal fortification requirement in Ireland; UK-import share. — https://www.fsai.ie/consumer-advice/food-labelling/uk-flour-fortified-with-folic-acid-q-a
• Coeliac Society of Ireland, “Nutritional deficiencies” (healthcare professionals). Backs: Irish follow-up bloods, dietitian line, unfortified-GF-foods statement. — https://coeliac.ie/healthcare-professionals/nutritional-deficiencies/
• Food Standards Australia New Zealand, “Folic acid fortification” and “Monitoring of folic acid fortification.” Backs: AU/NZ bread-making-flour folic acid rule, organic and non-wheat exemptions, 2009 Australian start. — https://www.foodstandards.gov.au/consumer/food-fortification/folic-acid/mandatory · https://www.foodstandards.gov.au/consumer/food-fortification/folic-acid/monitoring-folic
• Food Standards Australia New Zealand, “Iodine fortification.” Backs: iodised salt in Australian bread since 2009, exemptions. — https://www.foodstandards.gov.au/consumer/food-fortification/iodine-fortification
• Ministry for Primary Industries (New Zealand), “Folic acid fortification of bread” (page could not be rendered by our fetcher on 2026-09-13; date and figures from search summary only — flagged). — https://www.mpi.govt.nz/food-business/bakery-and-grain-based-products/folic-acid-fortification-of-bread
• Regulation (EC) No 1925/2006 on the addition of vitamins and minerals to foods. Backs: voluntary-addition scope; national mandatory schemes reserved (recital 3, Art. 11). — https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32006R1925
• Bundesinstitut für Risikobewertung, Stellungnahme Nr. 027/2017, “Nutzen-Risiko-Abwägung einer flächendeckenden Anreicherung von Mehl mit Folsäure” (16 Aug 2017). Backs: no mandatory flour fortification in Germany/EU (status sentence only). — https://www.bfr.bund.de/cm/343/nutzen-risiko-abwaegung-einer-flaechendeckenden-anreicherung-von-mehl-mit-folsaeure.pdf
• Istituto Superiore di Sanità, EpiCentro, “Che cos’è la fortificazione di un alimento?” (28 Jul 2016). Backs: Italy voluntary-only fortification; which foods carry it. — https://www.epicentro.iss.it/acido-folico/Fortificazione
• Food Fortification Initiative, Germany and Italy country pages (reference-grade cross-check only; the generic nutrient list on those pages is not used). — https://ffinetwork.org/germany · https://www.ffinetwork.org/italy
• Fry L, Madden AM, Fallaize R. J Hum Nutr Diet 2018. PMID 28851025. Backs: UK product survey. — https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=TITLE:%22gluten-free%20versus%20regular%20food%20products%22%20AND%20SRC:MED&resultType=core&format=json
• Vici G, Belli L, Biondi M, Polzonetti V. Clin Nutr 2016. PMID 27211234. Backs: GFD nutrient-profile review. — https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=EXT_ID:27211234%20AND%20SRC:MED&resultType=core&format=json
• Thompson T et al. J Hum Nutr Diet 2005. PMID 15882378. Backs: US fibre/iron survey. — https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=AUTH:%22Thompson%20T%22%20AND%20TITLE:%22gluten-free%20diet%20survey%22&resultType=core&format=json
• Celiac Disease Foundation, “Treatment & Follow-Up.” Backs: US follow-up timing, lab list, RD referral, supplementation line. — https://celiac.org/about-celiac-disease/treatment-and-follow-up/
• Canadian Celiac Association, “Management of Celiac Disease Patients.” Backs: Canadian follow-up timing and nutrient tests. — https://www.celiac.ca/healthcare-professionals/management/
• Health Canada, “Celiac disease.” Backs: family-doctor follow-up; malabsorption list. — https://www.canada.ca/en/health-canada/services/food-nutrition/food-safety/food-allergies-intolerances/celiac-disease.html
• Coeliac Australia, “Monitoring and follow-up of coeliac disease.” Backs: Australian review schedule, nutrient screen, dietitian, bone density. — https://coeliac.org.au/article/monitoring-and-follow-up-of-coeliac-disease/
• bpacnz, “Coeliac disease: investigation and management” (12 Aug 2022). Backs: New Zealand primary-care follow-up. — https://bpac.org.nz/2022/coeliac.aspx
• Deutsche Zöliakie-Gesellschaft, “Wie geht es weiter, wenn die Diagnose steht?” Backs: German baseline list and partial reimbursement of dietetic counselling. — https://www.dzg-online.de/wie-geht-es-weiter-wenn-die-diagnose-steht
• Ministero della Salute, Protocollo per la diagnosi e il follow-up della celiachia, GU Serie generale n. 191, 19 Aug 2015 (AIC mirror PDF; salute.gov.it bot-walled). Backs: Italian follow-up protocol. — https://static.celiachia.it/assets/uploads/2019/11/ProtocolloDiagnosiFollowUP.pdf
• AIC, “Esenzioni e prestazioni.” Backs: LEA co-payment exemption (visit + anti-tTG every 2 years). — https://www.celiachia.it/diritti-e-norme/esenzioni-e-prestazioni/
• AIC, “Erogazione alimenti senza glutine: assistenza alla dieta.” Backs: free GF products, monthly caps, voucher channels. — https://www.celiachia.it/diritti-e-norme/assistenza-alla-dieta/
• AIC, FAQ “Esiste una norma che tutela il celiaco nelle mense pubbliche?” Backs: Legge 123/2005 canteen right. — https://www.celiachia.it/faq/esiste-una-norma-che-tutela-il-celiaco-nelle-mense-pubbliche/

We inform; we don’t diagnose or prescribe. Coeliac disease is a medical condition — questions about your own blood results, supplements or follow-up belong with your gastroenterologist, GP, paediatrician or dietitian.