pink tobacco budworm Caterpillar (Heliothis virescens) - North Carolina Arboretum, Asheville, North Carolina, USA Stock Photo Rose – Budworm | Walter

However, tobacco leaves contain nicotine: one of the alkaloids that combine at nicotinic acetylcholine receptors (nAChRs) 3 and induce secretion of dopamine, a neurotransmitter in the brain that induces pleasure, thus causing addiction 4

In one study conducted in San Diego, California, THS residue was found in all 220 homes of people in low-income multiunit housing that were surveyed, ranging from 0.5 to 3926 g nicotine/m 2 [7]

After smoking a System, swab the reservoir of its condensate before the liquid turns to gel or disappears

If you're a beginner or prefer a milder smoke, opt for a blend with lower nicotine content