____ people drink coffee to gain energy and stay alert. ____ some studies show that it can have the opposite effect. ____ it can actually make you feel tired. How can it be, you ask? ____ if you drink a lot of coffee, you develop a tolerance to it. On one hand, you can still gain energy from drinking it, but ____ you have to drink significantly more of it to stay alert. ____ , have I told you about drinking tea?

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