how to clean tobacco stained teeth DOES STAIN TEETH?, Your have pores just like your skin. The nicotine and tar in tobacco easily absorbs into these pores causing a yellow or brown discoloration. Although nicotine, by How to Remove Nicotine Stains
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Data Sources: [1] Gormsen, J., Hjrne, F., & Helgstrand, F

Puppies and kittens sometimes arrive at their new owners home with worms already present
Here's a neat tip: some insurers treat nicotine gum differently than traditional tobacco products

Perhaps its a habit or maybe quitting only worked for a short time before- youve tried everything

[69] Smoking has elements of risk-taking and rebellion, which often appeal to young people