For many of us, drinking a glass of water before bed is part of our evening ritual. You can’t, but it’s definitely not refreshing.
After all, there is a reason for this. We spoke to a toxicology expert to find out more.
What happens if you leave tap water overnight
Leaving tap water on overnight or for long periods of time exposes it to ambient air.
Air contains multiple gases such as oxygen, nitrogen, and carbon dioxide. Dr. Kelly Johnson Arbor, MDA doctor of medical toxicology at the National Capital Poison Center explains. These gases, especially carbon dioxide, dissolve in tap water when exposed to air. When you drink tap water that has been left overnight, an enzyme in your body (called carbonic anhydrase) converts carbon dioxide into carbonic acid.
Related: What’s the difference between seltzer, club soda, tonic water, and sparkling water?
Evaporation and settling also play a role.
Dr. Luz Claudio, PhD, Professor of Environmental Medicine and Public Health, Icahn School of Medicine, Mount Sinai, said: The first is that some of the water evaporates and the second is that sedimentation can occur where solids and heavy molecules can settle to the bottom of the glass. ”
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However, none of these potential aquatic changes are likely to be detrimental. “So I disagree with the ‘don’t drink’ premise,” Dr. Claudio adds.
how to make water taste better
Many people find that cold water tastes better than lukewarm water.
Cold water increases salivary flow more than hot water, and increased salivary flow is associated with a decreased sensation of thirst, says Dr. Johnson Arbor. For this reason, cold water is perceived to be more effective than warm water in quenching thirst.
Cold water soothes other sensations associated with dry mouth and is more satiating than warm water.
It is also important to develop knowledge about potential contaminants. The Environmental Protection Agency provides a list of types of contaminants in drinking water.
To make sure the tap water in your area is safe and free of toxic chemicals, check EWG’s tap water database and enter your zip code.
Next: New research shows gas stoves may be leaking toxic chemicals — how worried should we be?
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