There is a study that has attempted to look at this, undertaken by some of my colleagues at University of Bristol (full disclosure, I am a member of the same research group as two of the authors of this paper)
Stocks as a repeat-purchase accessory for RYO customers
Horiyat discusses the relationship between tobacco use, systemic inflammation, gut microbiome health, nutritional status (particularly vitamins C and D), and oral health, because holistic teeth whitening for smokers means treating the whole person, not just the teeth
Though cigars also contain nicotine because nicotine is inherent in tobacco plants they contain no additives or burning agents
This is a major loss for public health, and a huge win for the tobacco industry whose profits will be boosted at the expense of Kiwi lives, the group said in a statement, adding that there was still massive support from New Zealanders for the world-leading smoke-free amendments