does a cigarette filter out thc Stop You Getting High? – Don't smoke it with tobacco:

For example, the limits might be not more than 200 cigarettes and 100 cigars if arriving from other than a beneficiary country and insular possession. If you are returning from certain territories then every 31 days, you can return with higher amounts

To the best of my knowledge with my interaction with the company it doesnt use any chemicals or cover-up scents to freshen the air, just works with their magic minerals that remove the gunk from the air and blow out nice clean air. P Smith

Efficacy of a nicotine lozenge for smoking cessation

Harmful Gases & Odors: This is the invisible part, including smelly molecules and nasty chemicals (VOCs) that cause the lasting odor