INS and gestational diabetes: It has been suggested that although a high-quality carbohydrate diet is not very useful in the treatment of GDM, it can reduce the amount of insulin used.[55,56] It has also been suggested that a high-quality carbohydrate diet significantly reduces 2-hour postprandial glucose in GDM patients, but has no significant effect on fasting glucose and insulin requirements.[57] Other studies have shown that a high-quality carbohydrate diet reduces the chances of gestational weight gain and preterm labor in women at high risk of GDM, but does not prevent GDM in these women.[58]