Fasting blood sugar is higher than nighttime after dinner sugar?

Fasting blood sugar is typically lower than nighttime after-dinner sugar.

Fasting blood sugar is measured after an overnight fast of 8 to 12 hours. During a fast, the body's glucose stores are depleted, and the liver produces glucose to maintain normal blood sugar levels. As a result, fasting blood sugar levels are typically lower than after meals.

Nighttime after-dinner sugar is measured about two hours after eating a meal. After a meal, blood sugar levels rise as the body digests the carbohydrates and converts them into glucose. The liver also releases glucose into the bloodstream to prevent blood sugar levels from dropping too low. As a result, after-dinner blood sugar levels are typically higher than fasting blood sugar levels.

However, there are some exceptions to this rule.

In people with type 2 diabetes, fasting blood sugar levels may be higher than after-dinner sugar levels. This is because type 2 diabetes is characterized by insulin resistance, which means the body's cells are less responsive to insulin. As a result, glucose builds up in the bloodstream after a meal, and blood sugar levels can remain elevated for several hours.

In people with certain medical conditions, such as Cushing's syndrome or pheochromocytoma, fasting blood sugar levels may also be higher than after-dinner sugar levels. These conditions cause the body to produce too much cortisol or adrenaline, which can raise blood sugar levels.

If you are concerned about your blood sugar levels, talk to your doctor. Your doctor can recommend a blood sugar testing schedule and help you determine if your blood sugar levels are within the normal range.