Nearly 2 million U.S. adult nonsmokers vape FDA OKs best selling e cigarette Vuse Alto in the U.S., but only in tobacco flavour CCentral U.S. health regulators have announced their first authorization of fruit flavored electronic cigarettes intended for adult smokers. MORE BELOW Reynolds American Files for FDA Review of E cigarette Respiratory Therapy 2.3% of US population reports current e cigarette use