After my daughter's celiac diagnosis, I realized I knew almost nothing about how the disease shows up in babies. A pediatric gastroenterologist asked if I had noticed symptoms in her infancy, and I had no answer. So I went to old medical journals and textbooks, not just cookbooks. The story I found changed how I think about screening the youngest kids.

I am not a doctor, and this is not medical advice. But I am a mom who reads primary sources and takes notes. These are the details that stayed with me.

Doctors described the disease before they understood it

Aretaeus of Cappadocia, a Greek physician in the second century, wrote about children with bloated bellies, loose stools, and bodies that wasted away despite eating. He called the condition koiliakos, from the Greek word for abdomen. For centuries, physicians could describe the disease but could not treat it. Children who fit that picture often died from malnutrition.

In 1888, Samuel Gee, a British pediatrician, gave a lecture called "On the Coeliac Affection." He told colleagues that the condition mostly affected children between one and five years old and argued that diet held the only real hope. But Gee believed the disease could be cured. That part turned out to be wrong. He could not identify the exact trigger. That step took another 60 years.

The Dutch famine that pointed to wheat

During World War II, the Netherlands suffered a severe food shortage in the winter of 1944 and 1945. Bread deliveries stopped. Willem-Karel Dicke, a Dutch pediatrician, noticed that the children he treated for chronic diarrhea and poor growth improved when wheat flour was scarce. When wheat flour returned after liberation, their symptoms came back.

Dicke tested the observation by removing wheat from some children's diets, adding it back, and tracking their weight, stool pattern, and overall condition. His work in the late 1940s and early 1950s established gluten as the trigger for celiac disease. A parent caring for a baby with this disease finally had a clear culprit: the protein in wheat, barley, and rye. The treatment was careful, permanent food elimination.

Biopsies made the damage visible, but they set a high bar

Even after Dicke's discovery, diagnosis in babies stayed hard. A doctor could suspect celiac from symptoms and a trial gluten-free diet, but there was no way to see the intestinal damage without major surgery. That changed in 1956, when Margot Shiner, a British gastroenterologist, described a technique for taking a tiny sample of the small intestine through a tube passed into the mouth. Doctors could now examine the villi, the fingerlike projections that absorb nutrients. In celiac disease, those villi flatten.

The biopsy became the standard for decades. It also introduced a problem we still live with. Because the procedure was invasive, doctors ordered it only when a baby's symptoms were severe enough to justify it. Mild or unusual cases went undetected. Two things shape how we diagnose celiac disease in babies: the science of the cause and the tools we use to see damage. The thresholds for using those tools matter just as much.

Blood tests reframed who counts as having celiac disease

The serology era began in the 1980s and 1990s. Researchers identified antibodies that people with celiac produce against gluten and against their own tissues, including endomysial antibodies and tissue transglutaminase antibodies. Blood tests made screening possible without a biopsy. They also revealed something uncomfortable: the classic wasting baby was no longer the typical patient.

A child with celiac could have constipation instead of diarrhea, could be irritable without obvious belly pain, or could have iron deficiency anemia and normal growth. Some children with celiac are not thin at all. The 2016 guidelines from the North American Society for Pediatric Gastroenterology, Hepatology and Nutrition list chronic diarrhea, chronic constipation, poor growth, and iron deficiency anemia as symptoms that should prompt testing in infants and toddlers. For babies, the list also includes abdominal bloating and irritability after eating wheat.

The history matters for parents because the disease once required a dramatic presentation to earn a diagnostic workup. Blood tests made milder cases visible, but our mental image of the disease kept lagging. Most people still expect a baby with celiac to look starved. A baby who is chubby, gassy, and fussy fits a dozen other explanations, and celiac rarely makes the shortlist.

Sweden's baby boom in celiac diagnoses

Sweden's experience in the 1980s and 1990s showed how feeding advice can influence celiac rates in babies. At that time, Swedish health authorities recommended delaying gluten introduction until after six months and also increased the wheat content in commercial infant cereals. Clinics began reporting a sharp rise in celiac disease among children under two. When the recommendations shifted back toward introducing small amounts of gluten gradually, often while still breastfeeding, the number of new cases in Swedish toddlers dropped.

Researchers connected the rise and fall to feeding recommendations, but that episode could not establish a single cause. Later randomized trials in Europe tested early versus later gluten introduction in at-risk babies. The timing alone did not change how many children developed celiac disease by age three or five. Nearly everyone with celiac disease carries one of two gene variants, HLA-DQ2 or HLA-DQ8. Many people carry those variants and never develop celiac disease. Genes are necessary but not sufficient. No one has found a simple prevention recipe.

Why babies still get missed, and what parents can do

Nothing below replaces a conversation with a pediatric gastroenterologist. But after reading the history and current guidelines, I can share what I would tell a friend who suspects celiac disease in a baby.

What parents can ask for

• Keep gluten in the diet until testing. Celiac blood tests measure antibodies that appear when a child eats gluten. Removing gluten first can produce a false negative and delay answers for months.
• Ask for the specific test. A celiac panel usually includes tissue transglutaminase IgA and total IgA. Some doctors order only total IgA or an older anti-gliadin test, which misses many cases.
• Do not assume a baby is too young. Celiac disease can develop within a few months of gluten introduction, and testing can be done as soon as symptoms appear.
• Trust your record keeping over your memory. Jot down what the baby eats, what symptoms follow, and what the pediatrician said at each visit. Patterns emerge in a notebook that get lost in a blur of sleepless nights.
• Ask for a referral if symptoms persist. A pediatric gastroenterologist sees enough celiac disease to recognize the less obvious versions. General pediatric practice works on probability, and celiac disease in a growing, cheerful baby does not always make the probability cut.

What I'd want every parent researching this to know

The history has a repeating pattern. For centuries, celiac disease in babies meant a child who wasted away after eating bread. Then researchers learned wheat was the trigger. Then they learned not every child with celiac looks the same. Screening habits changed more slowly than the knowledge. A baby with celiac today can have normal growth, a normal appetite, and still have flattened villi causing long-term trouble.

If you are reading this because a baby you love struggles with food, or because you want to be ready, I hope this history makes you more willing to ask questions. The condition is real, testable, and manageable with a gluten-free diet. A gluten-free lifestyle with a baby takes extra planning, and it is still doable with the right support.

At Clean Monday Meals, we focus on gluten-free, dairy-free foods that families can use every day. Our recipes and seasoning blends come from our own kitchen, where celiac disease is part of daily life. If you are new to this, take a breath. The first weeks after a diagnosis are hard, but you do not have to figure it all out at once. You can find hundreds of gluten-free, dairy-free recipes in our free Recipe App, and there is a community there that gets it.