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Spatial, temporal, and demographic patterns in prevalence of smoking tobacco use and attributable disease burden in 204 countries and territories, 1990-2019: a systematic analysis from the global burden of disease study 2019

The tobacco chemicals create a sticky film that traps food debris and bacteria, which leads to enamel wear that exposes softer, easily stained layers underneath, gum disease that reveals more tooth surface for pigments to attack, persistent bad breath from bacterial buildup, and extra plaque and tartar that lock stain molecules in place

Yes, its the main reason for addiction

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When microorganisms are screened from the surface of tobacco, their adaptability and security to grow in tobacco after inoculation and fermentation were stronger than that of exogenous inoculants