[surrogatekey]

Well done you.

In terms of recreational nicotine, Swedish snus has the most established, long term evidence base for very significantly reduced risks.

It's reasonable to expect that a product like Zyn would fare even better than Swedish snus in long term studies because of the lack of tobacco specific nitrosamines. Although Zyn doesn't have a long term, formulation specific evidence base like Swedish snus, there is good evidence for its components.

Pharmaceutical nicotine replacement therapy products like nicotine gum could be options too. Guessing you've already tried that though... but even the FDA now says NRT can be used indefinitely.