While opinions differ slightly, and pipemakers take steps to reduce the potential for charring at the most vulnerable areas of the tobacco chamber, the overall opinion is that we should smoke until our tobacco stops tasting good, or until it starts taking too much extra puffing, or until it takes fiddling with the tobacco to keep it lit
The nicotine hit of 1792 is almost legendary
J.ChoiS.-J.et al (2018)
"Whether it's in the throat, or the upper airways, or if it gets transported all the way down into the alveoli, that depends on the size of the particles and their other physical characteristics," he explained
A useful Australian page should narrow the search, keep the language adult-only, and make the next click obvious: compare current stock, read the related guide, and avoid any claim that sounds like a medical promise