The Food and Drug Administration has issued a warning after an Ohio teen died from consuming pure caffeine.
The FDA warning tells consumers to avoid pure, powdered caffeine marketed as a dietary supplement on the internet.
On teaspoon is the equivalent of 25 cups of coffee.
Experts say the products are appealing to teens, but many do not know you can overdose on caffeine.
Symptoms include rapid heart beat, seizures, vomiting and disorientation.
Because pure caffeine is marketed as a dietary supplement it is not regulated by the FDA.