Research shows restricting flavored e cigarettes cuts vaping rates but raises smoking rates for young adults Flavored Vapes MOST Policy Initiative Indiana H.B. 1218: The Statewide Vape Ban, Take Action Now Vaping Laws in Missouri Age, Sales, Tax & Rules Guide 2025 Ecigator Reminder for Missouri Retailers: Tobacco Sales Law Compliance Missouri law prohibits the sale of tobacco products, alterative nicotine products, and vapor products to anyone under 21 years of age. For more information Missouri's attorney general and governor say they are working to tighten enforcement of vape sales after a First Alert 4 investigation exposed shops selling to underage customers.