Which is the least harmful drug? A Scientific Ranking of Psychoactive Substances
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3 min read
Globally, tobacco, alcohol, and illicit drugs account for millions of deaths and lost years of healthy life annually [1.5.4]. The complex question of **which is the least harmful drug** depends on how 'harm' is defined, with scientific analyses often challenging public perceptions and legal classifications [1.3.1, 1.2.3].
