The Caffeine Surge in Energy Drinks.

Sales of energy drinks in the US have grown to $19bn from $12bn over the past five years. Companies are trying to attract health-conscious customers with a wave of no-sugar, low-calorie drinks that claim to boost energy as well as replenish fluids with electrolytes and other ingredients. However, there are concerns that drinks being pitched as healthy are resulting in children and teenagers consuming caffeine in unhealthy amounts. A 12-ounce can of Prime Energy contains 200 milligrams of caffeine, roughly equivalent to two Red Bulls, two cups of coffee or six cans of Coca-Cola.