We wouldn't want to see it promoted as a completely safe alternative.

It is appalling the way they deliberately set out to mislead smokers about the toxins in tobacco smoke knowing full well these machine measurements do not reflect how people smoke and therefore how much carbon monoxide and other toxins they are inhaling. We need a major overhaul of the system for measuring toxins in tobacco smoke.

Giving up could reverse the condition if it hasn't gone too far. If it's already severe, quitting will stop it getting any worse.