Don’t let your kids in on the latest development in allergy research. While fruits and vegetables are an important part of our diets, studies recently found that a certain protein within various types of produce can actually trigger hay fever in children.

According to Swedish news provider The Local, researchers at Karlinska Institute in Stockholm found apples, pears, carrots and other fruits and veggies contain a protein that is similar to pollen, which is what leads to children’s seasonal allergies.

Dr. Helen Rosenlund looked at nearly 2,500 8-year-old Swedish children who have been in another study since birth, in which they eat up to two servings of fruit and three of vegetables every day, reports the news source. She found that those who at the most fruit were around 66 percent more likely to develop hay fever. Of those children, nearly half were found to be sensitive to birch pollen – the type of pollen that is most similar to the proteins in apples, pears and carrots.

This is not to say that a diet lacking fruits and vegetables is healthier. On the contrary – it is important for parents to monitor seasonal allergies, such as the sensitivity to birch pollen, and plan meals accordingly.