Fluid Temperature has No Effect on Hydration

The liquid temperature has no influence on the liquid supply

April 28, 2007 at 12:53 pm

On a hot summer day, we grab an ice cold drink to rehydrate in the scorching sun. Frozen water bottles and ice coolers are used to avoid warm drinks that seem to evaporate when hit your mouth.

Contrary to the practice of cooling or heating liquids to relieve your thirst, this study shows that temperature has no real effect on hydration. Fluids given to infants at body temperature (37 ° C) and room temperature (23 ° C) were equally effective at hydrating. This was the same case for both rotary and oral bolus rehydration methods (all at the same time).

However, cold fluids pass your body faster than warm fluids, which gives the impression that they are better hydrated. This is not necessarily the case. In addition, your body experiences a chill in temperature when it is filled with a colder liquid that feels more refreshing on a hot day. However, when it comes to thirst, colder or warmer drinks can quench it as well.

Pizarro, DT, Posada, GS, Levine, MM, Nalin, DR and Mohls, EV (1987). Comparison of the effectiveness of oral rehydration fluids given at 37 ° C or 23 ° C. Journal of Tropical Pediatrics, 33 (1), 48-51.

Entry filed under: fluids, hydration, temperature.

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