can old cigarettes make you sick Cigarette Smoking | Smoking and Tobacco Use Is It OK to Smoke

Alongside the tar there is the carbon monoxide - this is formed whenever something burns and the carbon is not oxidised completely, so instead of carbon dioxide, carbon monoxide is formed

The tobacco industry understands this, for it has been fudging or hiding data for years

Furthermore, smoking induces vascular vasoconstriction, sinusoidal endothelial dysfunction, and smooth muscle proliferation, leading to hypoxia, capillarization of sinusoids, and further activation of HSCs [18]

Cheaper methods like butane, propane, and ethanol extraction can leave residual solvents behind in the final oil if not purged properly