“Now” is not always the best time to drink it.
Morning! Time to wake up.
Ok then. It's coffee time.
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First, acquire your coffee. An 8oz cup contains around 135mg of caffeine, which is the part you're really after.
But if you're buying from a coffee chain, chances are you're drinking more than that. The smallest cup Starbucks offers, called a "short," is 8oz. The smallest one they actually advertise in store is the "tall," which is 12oz.
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But hang on a second. Turns out, first thing in the morning might not be the best time to drink your coffee.
You don't want to drink coffee when the levels of cortisol (a stress hormone) in your body are already high. That's because cortisol is related to alertness, and levels are high when you first wake up. So you probably don't need coffee right then (though it might feel like you do).
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