Caffeine: How to use it and what time to stop drinking it for better sleep | CNN

Whether you choose coffee, tea or an energy drink, consuming caffeine may be a part of your everyday routine. A nutrition expert offers advice on how to know when you’ve had too much and how to avoid keeping yourself awake at night.分類：behavior and cognition, science, sleep, beverages, business and industry sectors, business, economy and trade, caffeine and health, coffee, consumer products, diet and nutrition, diet, nutrition and fitness, food and drink, health and medical, kinds of foods and beverages...