The oil is not allowed in vapes sold in Michigan because it can cause lung damage when inhaled. Convenience stores, smoke shops and even drug stores across Michigan often offer a wall of tobacco products behind the counter. Michigan is one of only eight states where retailers aren't required to Michigan Bans Flavored E cigarettes A Day After New York WKAR Public Media Ann Arbor businesses prepare for flavored e cigarette ban Tainted THC vapes sold to Michigan customers for nearly a year before detection mlive.com