奇速英语

Researchers have found something surprising in Boston baby bottles.

According to a new study by Boston Medical Center, about 15 percent of 2-year-olds drink as much as four ounces of coffee a day.

At the age of one year, between two and three percent of the infants studied were drinking coffee. At two years, that number grew to 15 percent -- consuming on average a little more than an ounce of coffee a day.

There are no official guidelines for children's coffee consumption, but there are some alarming potential health effects. The hospital said previous studies have shown that coffee and caffeine have been associated with some diseases in children and adults.

Another study found that 2-year-olds who drank coffee or tea had triple the risk of being overweight in kindergarten, according to the hospital.

The study looked at 315 pairs of mothers and infants, and researchers said they were "surprised" to find that many mothers reported giving their babies coffee.

The study did not address how common coffee drinking may be in children that young nationwide, but another study published in 2014 found nearly 63 percent of American children ages 2 to 5 consume at least some caffeine, mostly from drinking sodas.

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