Evaluation of Statewide Restrictions on E-Cigarette Nicotine Strength- United States, 2017-2022.

US statewide policies restricting e-cigarette nicotine strength appear to be associated with reductions in average nicotine strength in sales within that state; however, there appears to be no impact on unit sales. When these policies are implemented along with flavor restrictions; reductions in average nicotine strength occur in addition to reduced unit sales.