WASHINGTON (WRCB) -- The FDA is investigating the growing trend of foods and drinks touting an 'extra' boost of caffeine.

The agency says it will study the potential impact these "new and easy sources" of caffeine will have on children and teens.

The move comes in response to a new caffeinated gum that was introduced this week by Wrigley's.

The "alert energy gum" contains 40 milligrams of caffeine per piece, which is the equivalent of a half a cup of coffee.

A Wrigley's spokesperson says the gum is intended for adults.

The American Academy of Pediatrics warns that too much caffeine can be dangerous for children, and can harm their still developing cardiovasular and neurological systems.

The FDA is already investigating the safety of energy drinks and energy shots.