How To Boost Your Mental Energy Without Caffeine (M)

Coffee makes people think in more concrete ways and perceive that time is shorter.

Coffee makes people think in more concrete ways and perceive that time is shorter.

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Caffeine Takes This Long To Kick In And Wear Off (S)

Surprisingly, men are more sensitive than women to the effects of coffee, the study also found.

Surprisingly, men are more sensitive than women to the effects of coffee, the study also found.

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