"Why Women Over 30 Are Often Misdiagnosed with Celiac Disease"

"Many women over 30 live years with celiac disease without knowing it. Learn why misdiagnosis is so common, what symptoms are often overlooked, and how I finally got my answers."

Giselle Meireles

5/23/20265 min read

I Thought My Body Was Just Changing — I Had No Idea It Was Fighting a Disease

There's something women over 30 are told constantly: your body changes as you age. Tired all the time? That's normal. Struggling to concentrate? Probably stress. Feeling weak? You're just busy.

I believed it. For months, I explained away every symptom as part of getting older, working harder, adjusting to life in a new country. It wasn't until I finally had the right doctor asking the right questions that I understood — my body wasn't just "changing." It was sending urgent signals that something was seriously wrong.

Looking back, the signs were all there. I just didn't know what I was looking at.

The Symptoms I Had — And What I Thought They Were

Constant fatigue and weakness

There were days I genuinely couldn't get out of bed. Not tired — deeply, bone-level exhausted. I put it down to the demands of everyday life. I was living abroad, navigating a new language, building a new routine. Of course I was tired.

Recurring anaemia

Every blood test showed anaemia. I had iron infusions, felt better for a while, then crashed again — especially around my period, when blood loss made everything worse. I assumed my heavy menstrual flow was the entire cause. It wasn't. The real problem was that my intestine had already lost its ability to absorb iron properly. The infusions were treating the symptom, not the cause.

Brain fog and difficulty concentrating

The lack of concentration frightened me more than anything else. Simple tasks felt overwhelming. I'd forget things mid-thought. I'd get in the car and completely lose track of where I was going. I told myself it was fatigue. It was actually my body running critically low on B12 — a deficiency that directly affects neurological function.

Numbness in hands and feet

Waking up with tingling or numbness in my hands and feet — I thought it was just the way I was sleeping. In reality, it was another classic sign of B12 deficiency, which is directly linked to celiac malabsorption.

Chronic constipation

Despite drinking enough water and eating well, I was constantly constipated. Most people associate celiac disease with diarrhoea — but constipation is equally common, especially in women. This symptom is frequently dismissed or attributed to diet, stress, or irritable bowel syndrome.

I always ate well — and that made it harder to see

This is something I want to say clearly: I never had an unhealthy diet. I cooked from scratch, ate vegetables, avoided processed food. And yet my body was starving for nutrients. That's the cruel reality of celiac disease — it doesn't matter how well you eat if your intestine can't absorb what you're giving it.

Why Celiac Disease Is So Often Missed in Women Over 30

My experience isn't unusual. I've heard stories from women who spent years — sometimes a decade or more — searching for answers before receiving a celiac diagnosis. Here's why it happens so often:

1. The Symptoms Look Like Everything Else

Fatigue, brain fog, anaemia, bloating, mood changes — these are symptoms that overlap with dozens of other conditions. Hypothyroidism, perimenopause, iron deficiency anaemia, irritable bowel syndrome, depression, chronic fatigue syndrome. Without a doctor who thinks to look for celiac disease specifically, it's easy to treat each symptom individually and never find the root cause.

2. Women's Symptoms Are Frequently Dismissed

Research consistently shows that women's pain and symptoms are more likely to be attributed to stress, anxiety, or lifestyle factors than investigated thoroughly. Many women with celiac disease are told they have IBS, that they're "just tired," or that their symptoms are related to their menstrual cycle — without further investigation.

3. Celiac Doesn't Always Look the Way People Expect

The "classic" celiac presentation — severe diarrhoea and dramatic weight loss — is actually less common than the so-called "silent" or atypical presentation. Many adults, particularly women, present primarily with anaemia, neurological symptoms, fatigue, and bone density issues rather than obvious digestive complaints. This atypical picture delays recognition significantly.

4. The Diagnosis Requires Specific Testing — That Isn't Always Ordered

Celiac disease won't show up on a standard blood count. It requires a specific antibody test — the tissue transglutaminase IgA (tTG-IgA). Many GPs don't include this test unless celiac is already suspected. Without the right test, the diagnosis simply doesn't happen.

5. Going Gluten-Free Before Testing Causes False Negatives

This is critically important: if you eliminate gluten before being tested, the results may come back negative — even if you have celiac disease. The antibody levels drop when gluten is removed from the diet, and the intestinal damage begins to heal. Both the blood test and the endoscopy can produce false negatives in someone who has already gone gluten-free.

I want to be very clear about this because I've heard of people cutting out gluten, feeling better, having a negative endoscopy, and being told they don't have celiac — when they almost certainly do. Always get tested before removing gluten from your diet.

6. Symptoms Can Shift and Confuse

Celiac disease doesn't always present consistently. Symptoms can change over time, vary in intensity, and even seem to improve temporarily — which makes it easy to doubt yourself or accept vague reassurances that nothing is seriously wrong. This variability is one of the reasons diagnosis can take so long.

What Finally Led to My Diagnosis

In my case, it was a doctor who noticed a pattern. Not just one low result, but a recurring cycle — anaemia returning despite treatment, multiple vitamins depleted at the same time, a body that kept losing what it was being given. He looked at the whole picture rather than treating each symptom separately, and he asked a question that changed everything: what if your gut simply isn't absorbing nutrients properly?

That question led to a tTG-IgA blood test. My result came back at 95 — extremely elevated. A duodenal endoscopy confirmed significant damage to my intestinal villi. The diagnosis was unequivocal.

The moment was shocking. I had never heard of celiac disease. But it also brought an enormous sense of relief — finally, an explanation for years of feeling that something was wrong with my body.

If You Recognise Yourself in This Story

Please don't wait as long as I did. If you have recurring anaemia that keeps coming back despite treatment, unexplained fatigue, persistent brain fog, digestive symptoms that don't resolve, or a combination of deficiencies that don't make sense — ask your doctor specifically about celiac disease.

Ask for the tTG-IgA blood test. And please — do not cut out gluten before you get tested.

Share this article with someone who might need it. So many women are living with undiagnosed celiac disease right now, dismissing their own symptoms, being told it's stress or age or hormones. The more we talk about this, the faster someone gets the answers they deserve.

Next read: [5 Supplements That Helped My Gut Heal After Celiac Diagnosis →]

Disclaimer: This post is based on my personal experience and general health information. Always consult a qualified medical professional for diagnosis and treatment.

References:

Ludvigsson JF, et al. The Oslo definitions for coeliac disease and related terms. Gut, 2013.

Rubio-Tapia A, et al. ACG Clinical Guidelines: Diagnosis and Management of Celiac Disease. American Journal of Gastroenterology, 2013.

Volta U, et al. An Italian prospective multicenter survey on patients suspected of having non-celiac gluten sensitivity. BMC Medicine, 2014.

Hopper AD, et al. How patients with coeliac disease present to secondary care. European Journal of Gastroenterology & Hepatology, 2008.

"Why Women Over 30 Are Often Misdiagnosed with Celiac Disease"

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