"less healthy" is a bit of an understatement; they're not selling cigarettes that will kill you in the long term (or even the medium or short term). Fentanyl will kill you the first time you're exposed to it.
Increasing the potency of some drug with fentanyl is an interesting choice, because by the time the user *knows* how strong it is, there's some likelihood they're already dead.
Increasing the potency of some drug with fentanyl is an interesting choice, because by the time the user *knows* how strong it is, there's some likelihood they're already dead.