Caffeine Slows Water Molecules, Study Shows

Coffee may perk up people, but it puts water to sleep.

New research published in the Journal of Physics Communication found that both caffeine (C8H10N4O2) and taurine (C2H7NO3S), a common additive in energy drinks, actually slows the rotation of surrounding water molecules.

The effect is negligible for human health — researchers estimate that the caffeine in a cup of coffee slows about one in a million water molecules in the body, according to Physics Today.

However, the findings could be relevant in the study of emulsions, hydrogels, and similar substances.

Learn more about the study – and the science.


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