Methods: 1. 75g glucose powder tolerance test or 100g starch made bun meal test, they both have reference. But I prefer the former because it is hard to find standard steamed buns with 2 two sides nowadays. 2, each blood draw contains blood glucose, insulin or C-peptide (if you can choose, insulin or C-peptide only check one both), after fasting blood draw, use 200~300ml water to dissolve glucose powder, drink it within 5 minutes, make sure to drink all the glucose in the cup, remember the time to drink the first sip of water, start timing from the first sip, 30 minutes, 60 minutes, 120 minutes, draw four times. If repeated preprandial hypoglycemia, add 180 minutes of blood draw. Reasons: 1. This experiment is actually an excitation test. One is to see one’s blood glucose distribution curve. I have some patients whose blood glucose is not bad two hours before and after each meal, but the test glycated hemoglobin is high, what happened? By glucose tolerance test, we found that the blood glucose at 30 or 60 minutes was high, and the reason was clear. Of course, this situation can also be detected by dynamic blood sugar. 2. Check your endogenous islet function. Is it that the basal islet function is not secreted enough or the response to insulin after meal is not enough? Or is the peak of insulin secretion shifted back? Or is the endogenous islet function okay, that is, insensitive to the insulin you produce? Through the above-mentioned test, it is clear that you can select the appropriate glucose-lowering drugs to control blood sugar and achieve the effect of good blood sugar control, good protection of islet function and low economic cost. Every family has a difficult book, just like high blood sugar, there are many reasons, which area is insufficient, focus on regulating which area, the effect is very good.