The best time to drink glucose is as follows: 1, can be in the amount of exercise after the emergence of a transient hypoglycemia, drinking the best effect in too much exercise, or the body consumes too much energy, or emergence of emergency conditions, such as cold, nervousness, trauma blows and other situations, the body will appear a transient hypoglycemic reaction. At this time to supplement glucose is the best time period. 2, if the routine supplementation of glucose can be within 30 minutes before the three meals glucose supplementation, but usually advocate 5% glucose injection 80-100 ml can be. 3, diabetic patients, to prevent hypoglycemic reaction to sleep, can be in the 30 minutes before bedtime oral 5% glucose water 100-150 ml.