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Nicotine has cognitive benefits. An experimental use of the patch helped me focus. Smoking and the brain: What are the effects? 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 Does Smoking Decrease Testosterone?Yes and No What nicotine does to your brain Quitting smoking may be good for your brain, even if you stop later in life : Short Wave : NPR
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