According to a study published in the journal Human Psychpharmacology: Clinical and Experimental, the combination of caffeine and glucose revs up the brain. Researchers also found that by pairing the ingredients, both helped attention and memory.
The study was conducted at the University of Barcelona in Spain, and looked at a group of 72 women between the ages of 18 and 25. Participants were given doses of either water, water with caffeine, water with glucose, or water with both caffeine and glucose.
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