Swimmingdancer
Bluelight Crew
Nicotine is a terrible terrible habit. It is expensive and it kills you. If you want study benefits drink coffee.
You are thinking of cigarettes. Nicotine itself isn't harmful to your health unless you overdose. It's quite similar to caffeine in that regard. Not that I recommend a non-smoker chewing nicotine gum as a study aid, just saying, it's not the nicotine in cigarettes that causes cancer etc.