We already know the negative side effects of smoking. Now a new study has shown that second hand smoking could affect your brain.According to the study conducted by advance online edition of BMJ (formerly called the British Medical Journal), cognitive impairment was more common among passive smokers. People who never smoked were found to be 70% more cognitively impaired than smokers.
Mark Eisner, MD, MPH, an associate professor of medicine at the University of California, San Francisco, said that "This study raises the strong possibility that secondhand smoke causes cognitive decline, but further research is needed to establish a causal effect."
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