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[Sugar] affects the brain in ways that can lead to unhealthy habits, especially in people who are stressed or have had challenging experiences early in life, said Selena Bartlett and Kerri Gillespie, neuroscientists at Queensland University of Technology in Australia

Each time you light up, the chemicals in cigarettes are damaging your skin in many different ways

Retrieved 14 February 2012

The results suggest that people who regularly mix tobacco with cannabis are more at risk of psychological dependence than people who use cannabis and tobacco separately, without mixing them, or use cannabis alone, the researchers said