Federal health officials said Wednesday they have found cancer-causing ingredients in electronic cigarettes, reports the Associated Press.

The Food and Drug Administration (FDA) said testing of products from two leading electronic cigarette makers turned up several toxic chemicals, including a key ingredient in antifreeze.
FDA scientists said they tested 19 varieties of cigarettes, half of which contained forms of nitrosamine, a carcinogen known to cause cancer in humans. Many products which claimed to contain no nicotine actually had low levels of the stimulant.
Brands tested by the agency included Smoking Everywhere, marketed by a Florida-based company and NJoy Cigarettes, based in Scottsdale, Ariz. The Electronic Cigarette Association, which represents the companies, had no immediate comment.
Regulators said they have halted 50 shipments of electronic cigarettes at the border since last summer. The FDA said it is authorized to seize the products because — for legal purposes — they are a medical device used to deliver nicotine. However, the FDA's enforcement attempts have been challenged in federal court by manufacturers. (pi)