結果 : why does sugar and caffeine make me tired
1:16

Why Do You Feel Sleepy After Drinking Coffee? The Surprising Science Behind It | Dr. Brett Berner

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Dr Karl - Can coffee make you sleepy?

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Why Am I Always Tired? Avoid These 6 Energy Vampires | Exhausted

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1:27

Is coffee making you sleepy? Learn why in this video! 😴☕️ #Coffee #Caffeine #Sleepy #Adenosine

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How sugar affects the brain - Nicole Avena

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