What to know about sale of smoke, vape products to KY minors Lexington Herald Leader How old do you have to be to vape? January 1st marks deadline for Kentucky vape, tobacco retailers to apply for licenses Most e cigarettes (vapes) contain nicotinethe addictive drug in regular cigarettes, cigars, and other tobacco products. Nicotine can harm the adolescent brain which continues developing until about A new Kentucky law requiring smoke shops to obtain updated retail licenses takes effect Jan. 1, marking a significant step in efforts to prevent youth vaping across the state. Details below. Vaporizer and E Cigarette Laws by State 2026