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To best minimize your risk, consume less than 100 milligrams of caffeine per day, or no more than 1 to 2 cups of coffee. Caffeine may also have adverse impacts in children, such as disturbing their sleep, and intake should be limited to 2.5 milligrams of caffeine per kilogram of their body weight per day.
By the end of the 20th century, coffee was the biggest money making crop in the world. Where does caffeine come from when caffeine is widely used globally; more than 80% of the adult population drink coffee regularly. Children also have caffeine intake as they also consume chocolates, sodas and iced teas. It is estimated that an average person can consume up to 70 mg of caffeine per day.