Caffeine is an everyday miracle that helps wake up or stay awake for work. In fact, caffeine is a natural stimulant that increases brain activity, thus making us remain alert and active. Including caffeine in your diet can speed up your reaction, improve short-term memory and even prevent type 2 diabetes and Parkinson's disease.
The US Department of Agriculture (USDA) recommends restraining your daily caffeine intake to 2-4 cups of tea or coffee per day (400 mg daily). Do you know how much caffeine your favorite beverage has?
Espresso contains 40 mg of caffeine in one shot, and black tea ranges between 25-48 mg per cup. A large cup of French-pressed coffee contains about 107 mg of caffeine. One cup of green tea has about 25 mg of caffeine and is a perfect drink to have during the day.