The U.S. Food and Drug Administration (FDA) has issued a warning about powdered pure caffeine being marketed directly to consumers, and recommends avoiding these products. In particular, the FDA is concerned about powdered pure caffeine sold in bulk bags over the Internet.
The FDA is aware of the death of at least one teenager who used these products, which essentially, consist of 100 percent caffeine. A single teaspoon of pure caffeine is roughly equivalent to the amount in 25 cups of coffee.
The FDA advises that pure caffeine is a powerful stimulant and very small amounts may cause accidental overdose. The agency further advises parents to be aware that these products may be attractive to young people.