A study found that Australian-born children with Asian mothers are more likely to have a nut allergy than Asian-born children who moved to the country.

The Murdoch Children’s Research Institute and the University of Melbourne looked at 57,000 five-year olds.

Researchers said children born in Asia who migrated to Australia were at a decreased risk for food allergy. They said the study suggests that something about the Asian environment protects against food allergy. The study was published in Clinical and Experimental Allergy.