Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Did you know that the legal age to purchase and use vaping products in the United States is 21 years of age? For more information about youth nicotine use visit https: med.stanford.edu halpern felsher reach lab parent corner.html Vaping Laws in New York Flavor Ban, Age 21 & Tax Guide Ecigator Vaping on the rise in U.S., especially among young people Pew Research Center