do cigarettes increase focus Nicotine addiction starts fast. When someone smokes a cigarette, nicotine goes into the lungs and quickly enters the bloodstream. It reaches the brain in just 7–20 seconds. Once there, it releases dopamine Quitting smoking may be good
Quitting smoking may be good for your brain, even if you stop later in life : Short Wave : NPR Smoking harms not just your physical health, but your mental health too Many say they smoke to stay focused. This has led scientists to consider whether nicotine might directly influence people's ability to think. Here's what they have found Is Nicotine a Safe Cognitive Enhancer? YouTube
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