A few hours after a meal is considered fasting

Fasting refers to getting up in the morning without eating. Other times are not fasting. Most diabetics measure blood sugar more frequently, including fasting blood sugar, preprandial blood sugar, and 2 hours after meals. Generally, fasting is required to reach 8-10 hours. After about 8 o 'clock the night before, they no longer eat things containing calories. If they really feel hungry, they can drink boiled water appropriately.