Insulin 25.8 pmol/ml 1 hour after a meal is generally within the normal range. Insulin is the only hormone in the human body that fights against elevated blood sugar and can bring it down. And many other hormones can raise blood sugar, such as adrenaline, thyroxine, growth hormone, norepinephrine, and so on. Therefore, insulin is an extremely important hormone for controlling blood sugar. The normal fluctuation range of fasting insulin is 5-20 pmol/ml. After taking 75g of anhydrous glucose (or 100g of buns made of standard flour) orally, plasma insulin rises to the peak in 30-60 minutes, with the peak value being 5-10 times of the basal value, and returns to the basal level in 3-4 hours. There is not a clear range of 1-hour postprandial insulin, and there are often significant individual differences. It is generally believed that the peak 1-hour postprandial insulin level is 5 to 10 times that of fasting, and therefore, the 1-hour postprandial insulin level of 25.8 pmol/ml is still within the range of normal fluctuations. Patients found to have abnormal insulin secretion are advised to seek prompt medical attention.