Assertion: caffeine's effect | /r/HasProperty | combined with increased adrenaline
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Source sentences:
text: The increased metabolic rate caffeine produces increases the cellular consumption of glucose, so experiments that study the effects of coffee taken on an empty stomach are measuring the effects of increased temperature and metabolic rate, combined with increased adrenaline (resulting from the decrease of glucose), and so confuse the issue of caffeines intrinsic effects.