The participants were randomized into three diet intervention groups : ( 1 ) whole grain and low postprandial insulin response grain products , fatty fish three times a week , and bilberries three portions per day ( HealthyDiet group ) , ( 2 ) Whole grain enriched diet ( WGED ) group , which includes principally the same grain products as group ( 1 ) , but with no change in fish or berry consumption , and ( 3 ) refined wheat breads ( Control ) .
