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Smokestack lightnin The e-cigarette introduced the concept of tobacco harm reduction (which includes other non-combustible tobacco products such as snus of which more later) a concept as controversial for many governments, health professionals and campaigners as drug harm reduction

Researchers emphasise the need for prospective studies to establish definitive causation and determine whether vaping-associated hair loss follows distinct patterns from traditional smoking-related alopecia

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In 2022, the EU banned certain compounds in inks such as heavy metals and certain pigments that the European Chemicals Agency said were hazardous