If there’s one drink you expect to perk you up, it’s coffee. The bitter beverage is a potent source of caffeine, a substance that naturally stimulates the nervous system.
A boost of energy is what you’d expect from coffee, but this isn’t always the case. For some, coffee can make you feel sleepy.
Seven in 10 Americans drink coffee every week and 62 percent drink coffee every day, according to the National Coffee Association. If you’re one of them, you may head straight to the coffee pot in the morning to get that jolt of energy needed to jumpstart your day.
“At first, you get a boost from the caffeine,” says registered dietitian Keith-Thomas Ayoob, EdD, RD, FAND. “Then there’s often a plunge in energy as the caffeine wears off and your blood sugar levels drop.”