Also something to note, a lot of these pouches go through industrial practices, so I would buy off a brand which regularly conducts lab tests, such as Lucy. ZYN is ofted cited with heavy metals like lead, it's really hard to not face any risk, it seems everywhere you go, there's something. Best strategy is just not to do nicotine whatsoever. You look at the oxford studies on juul, and vuse for instance, you see many carcinogens, many unidentified chemicals, tobacco has 70 carcinogens, 7k chemicals, 30-40 being inherent with no combustion, you look at pouches, like zyn's, you see heavy metals like lead, you look at vape juices, you see propylene glycol and vegetable glycerin breaking down under heat into formaldehyde and acetaldehyde. Diacetyl was in vape juices for so long too, cinnamaldehyde damages lung cells, benzaldehyde, vanillin, ect are so bad when aerosolized not to mention the metal leaching from heating the coil like chromium, nickel, magnanese, ect accumulating in lung tissue