Federal regulators announced that e-cigarette use among teenagers have reached epidemic levels.

Federal regulators announced that e-cigarette use among teenagers have reached epidemic levels so they're cracking down on illegal sales to minors.

The Food and Drug Administration sent 13,000 warning letters to retailers for selling e-cigarette products to teenagers.

A faculty member at RIT has been researching the use of e-cigarettes and supplied some of the research data to the FDA.

The data concerns the use, toxicity and impact on youth.

"Flavor additives in electronic cigarettes, when they're heated, they decompose into chemicals that aren't there in the original e-liquid," explained Risa Robinson, RIT. "So, flavor additives that are approved by the FDA for eating and ingestion have not been approved for inhalation so there's the concern."

Manufacturers will have two months, roughly 60 days, to give the FDA their plan to address the problem.