Indeed. The bio-availability from 'chasing the dragon' on tin-foil is something like 50% or even less, although in the UK at least powdered heroin is adulterated with things like caffeine (which causes heroin to vaporize at a lower temperature) to make smoking more effective. Obviously IV injecting gives 100% bio-availability, though.

I’d like to take the opportunity and thank you for posting here. It’s hard enough to find reports of people that are going through a withdrawal, so being able to engage in a discussion is a rare opportunity. I wish you all the best in that process.