400mg is The Ideal Dose of the World’s Most Popular Drug

Scientists have found that it's safe to drink five Red Bulls or three cups of coffee in a day.

The Reactions YouTube channel has released a fascinating video explaining the science behind the world’s most popular drug, caffeine.

How does caffeine work? Caffeine enzymes block the molecule adenosine from doing its job. Adenosine is responsible for slowing down nerve activity in our brains, which gives us the signal to calm down and take a nap.

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Once caffeine starts doing its job, it works to:

  • Heighten brain activity
  • Increase athletic performance
  • Increase flow of oxygen and nutrients to the brain
  • Reinforce your ability to concentrate and increase heart rate

produces 400mg is The Ideal Dose of the Worlds Most Popular Drug

While too much caffeine (about 75 cups of coffee) can be toxic, scientists have found that that up to 400mg of caffeine per day is safe for adults.

That translates to to:

  • Three 8oz cups of brewed coffee
  • Five 8oz Red Bulls
  • Eight 8oz cups of black tea

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[via YouTube]

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