Tired of driving in the morning, can a cup of coffee really refresh you?
It takes only 10 minutes for coffee to play a refreshing role, and the maximum amount of caffeine entering the blood is 45 minutes, and it takes only a few minutes to reach half of the maximum amount. The influence of caffeine can last for 2-3 hours, and some can last for 4-5 hours according to the individual's unique sensitivity and metabolic rate.