The Food and Drug Administration is warning consumers not to use powdered pure caffeine products, especially products sold in bulk over the Internet.

An incident in which a Cleveland teenager died after ingesting the substance prompted the federal agency warning.

As Tech Times reported, Logan Stiner, a wrestler and student, reportedly died due to ingestion of the pure caffeine. Officials say the pure substance is being used as a way to lose weight quickly, by both teens and adults. The FDA says health officials and emergency responders are seeing a growing number of cases.

The product is basically 100 percent caffeine, explains the FDA, and one teaspoon is equal to the intake of 25 cups of coffee. Such a caffeine intake can pose a health danger, especially regarding the heart.

"Pure caffeine is a powerful stimulant and very small amounts may cause accidental overdose. Parents should be aware that these products may be attractive to young people," states a warning message by the FDA.

The symptoms of caffeine overdose include an erratic heartbeat and seizures, which can lead to death. Other symptoms of caffeine poisoning include diarrhea, disorientation, vomiting and a stupor type of behavior.

"These symptoms are likely to be much more severe than those resulting from drinking too much coffee, tea or other caffeinated beverages," notes the FDA warning.

The agency said parents need to pay attention to what teenagers may be doing with such products given the ease of purchase over the Internet.

"Parents should recognize that teenagers and young adults may be drawn to these products for their perceived benefits," says the FDA. "Pure caffeine products are potentially dangerous, and serious adverse events can result, including death. People with pre-existing heart conditions should not use them."

"The difference between a safe amount and a lethal dose of caffeine in these powdered products is very small," said FDA spokeswoman Jennifer Dooren.