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New study: Can a gluten-reduced diet in the first years of life prevent celiac disease?

Photo of pancakes with blueberries on top. Photo source: MostPhotos.
Photo source: MostPhotos.

Can a reduced intake of gluten during childhood affect the development of coeliac disease (gluten intolerance)? Researchers at Lund University will investigate this question in the new study GRAIN (Gluten Reduction After INfancy and the risk of celiac disease).

– We’ve seen in previous studies that the amount of gluten you eat plays a role in the risk of getting sick. In GRAIN, we want to see if we can prevent the onset of the disease by simply consuming less gluten than current recommendations during the first years of life, says Daniel Agardh, a physician at Skåne University Hospital and Adjunct Professor at Lund University, who is responsible for the study.

Two percent of the population

In Sweden, up to two per cent of the population is estimated to have coeliac disease. The disease is to some extent hereditary and to develop the disease at all, one must inherit specific risk genes. A person who is a carrier of one of these risk genes, is at significantly higher risk of developing coeliac disease. If one has a close relative (mother, father or sibling) with celiac disease, the risk of developing the disease increases further. The children participating in GRAIN participated at birth in the ASTR1D screening (which maps the children’s genetic risk of developing type 1 diabetes and celiac disease) and were found to carry one of the genes.

Limited gluten consumption

Half of the participants will maintain a gluten-reduced diet up to the age of five. Following a gluten-reduced diet means that the daily consumption of flour-based foods (containing gluten) will be limited. Examples of these foods include all kinds of bread, buns, biscuits, porridge, gruel, pancakes/waffles and pasta. The other half of the children will eat as usual.

After that, the children will be followed up to the age of ten, when all of them will start eating a "”normal diet”, i.e., the food that the family would have eaten anyway.

– By avoiding large amounts of gluten in the first few years of life, we believe that it is possible to slowly train the child’s own immune system to tolerate gluten later in life, says Daniel Agardh.

About the GRAIN study

Half of the study participants will be randomly selected to maintain a gluten-reduced diet up to the age of five, after which they will then eat a normal diet. The other half will be followed without any intervention. The children will be monitored with regular visits every six months to a research clinic up to the age of five. After the age of five, each child will be monitored with an annual visit to the clinic up to the age of ten. The research clinics are located in Malmö, Kristianstad and Helsingborg. 

More about GRAIN and the ASTR1D screening on the study’s website

About coeliac disease

Gluten is a protein found in our most common grains: wheat, rye and barley. In certain individuals, the protein causes an inflammation of the small intestine that destroys the lining of the intestine, making it unable to absorb the nutrients from the food. Today, anyone who is diagnosed with coeliac disease must eat a gluten-free diet for the rest of their life. One sign that the immune system reacts to the gluten protein is that tTG (tissue transglutaminase) antibodies are formed in the blood. The symptoms of celiac disease can vary greatly, but most commonly include stomach ache, diarrhoea or constipation, vomiting and a bloated abdomen. The disease can also lead to osteoporosis, infertility and depression. Children may suffer from malnutrition and delayed development because the intestine cannot absorb the nutrients in the food they consume.