Caffeine: A User's Guide to Getting Optimally Wired - Developing Intelligence - 0 views
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Caffeine: A User’s Guide to Getting Optimally Wired
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Caffeine is the most widely used stimulant in the world, but few use it to maximal advantage. Get optimally wired with these tips.
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1) Consume in small, frequent amounts. Between 20-200mg per hour may be an optimal dose for cognitive function. Caffeine crosses the blood-brain barrier quickly (owing to its lipid solubility) although it can take up to 45 minutes for full ingestion through the gastro-intestinal tract. Under normal conditions, this remains stable for around 1 hour before gradually clearing in the following 3-4 hours (depending on a variety of factors). A landmark 2004 study showed that small hourly doses of caffeine (.3mg per kg of body weight [approx 20 mg per hour; thanks digg!]) can support extended wakefulness, potentially by counteracting the homeostatic sleep pressure, which builds slowly across the day and acts preferentially on the prefrontal cortex (an area of the brain thought responsible for executive and “higher” cognitive functions).
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Khan Academy - 0 views
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With over 3,300 videos on everything from arithmetic to physics, finance, and history and hundreds of skills to practice, we're on a mission to help you learn what you want, when you want, at your own pace.
Central Security Service - Wikipedia, the free encyclopedia - 0 views
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