Cancer Causes Control 14(4):339346 Guengerich FP, Shimada T (1998) Activation of procarcinogens by human cytochrome P450 enzymes
It makes no sense we continue to allow this, but its there because of money and politics. And no: contrary to some Gen Z sentiment, cigarettes are not better for you than vaping because at least tobacco is a natural plant (they also contain around 600 ingredients like tar and formaldehyde, including 69 that are known carcinogens)

Herbal Cigarette Market Segmentation and Market Data Breakdown: Herbal Cigarette Market by Type (Organic Herbal Cigarette, Non-Organic Herbal Cigarette), Application (Men, Women), Distribution Channel (Forecourt Retailers, Tobacco Specialists, Convenience Stores, Online Retailers, Discounters, Hypermarkets and Supermarkets) Growth Drivers Rise in Usage of Herbal Cigarettes as Props and During Social Occasions It Get Promoted As a Quitting Aid High Consumption after Switching To Herbal Cigarettes from Regular Cigarettes Market Trends Significant Number of Public Awareness Programs and Campaigns Enquire for customization in Report @ What benefits does AMA research studies provides
You need some way of getting to the residue and destroying the tars that smoking has laid down
If you were given a spirometer to measure how well your lungs are working, use it as instructed