Considerations. The benefit of eating carrots is that they support your energy needs with 1 gram of starch and 3.4 grams of sugar, while having a small impact on your blood sugar. The glycemic index measures how quickly and how much carbohydrates from foods increase levels of glucose in your blood.onsiderations. The benefit of eating carrots is that they support your energy needs with 1 gram of starch and 3.4 grams of sugar, while having a small impact on your blood sugar. The glycemic index measures how quickly and how much carbohydrates from foods increase levels of glucose in your blood.