EurekAlert -- The Canadian policy of fortifying grain products with folic acid has already proved to be effective in preventing neural tube defects. The latest article published in the British Medical Journal by a group of researchers from the McGill Adult Unit for Congenital Heart Disease (MAUDE Unit), the Research Institute of the McGill University Health Centre (MUHC) and McGill University, shows that folic acid also decreases the incidence of congenital heart defects by more than 6%.