Does lower nicotine in vapes really mean less harm?

This study aims to gather information to help shape future rules about nicotine levels in e-cigarette liquids. Researchers will observe 120 regular e-cigarette users for two weeks to see if people who choose lower nicotine liquids actually consume less nicotine and are exposed to fewer harmful substances than those who choose higher nicotine liquids. The study will not provide any treatment but will measure participants' nicotine exposure, mood, cravings, and puffing habits in their daily lives.