What Nootropics do you use?

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Nootropics is a topic I found to be interesting and I would like to know if there are people here in MyLot who are using them? I do mean the legal kind of nootropics. Like coffee and those stuff the improve the brain function and helps against brain-fog. Are there any illegal nootropics? What are your experiences with those drugs? Did they ever help you improve your performance at work? How about your mood? :)