Inclusion Criteria:  T1D diagnosed according to the ADA (American Diabetes Assocciation) criteria T1D duration for at least 1 year prior to the intervention continuous glucose monitor (CGM) worn > 70% time in the month prior to the intervention  Exclusion Criteria:  last HbA1c < 40 or > 70 mmol/mol subject has celiac disease daily average carbohydrate intake < 130 g/day from 14 days food record prior to the intervention any concomitant disease possibly affecting glucose control any chronic medication possibly affecting glucose control