According to research published in the journal Current Biology, the human body uses 30% to 50% less water per day than our closest animal cousins. In other words, among primates, humans evolved to be the low-flow model. Lead author Herman Pontzer, associate professor of evolutionary anthropology at Duke University explains, “An ancient shift in our body’s ability to conserve water may have enabled our hunter-gatherer ancestors to venture farther from streams and watering holes in search of food. Even just being able to go a little bit longer without water would have been a big advantage as early humans started making a living in dry, savannah landscapes.”¹

To maintain hydration within a healthy range, the human body, like other animal bodies, is likened to a bathtub. Water coming in has to equal water going out. For example, when water is lost through sweating, the body signals us to drink. When we drink more than the body needs, the kidneys get rid of the surplus.

For each individual in the study, the researchers calculated water intake via food and drink on the one hand, and water lost via sweat, urine and the GI tract, on the other hand. When the researchers tallied the inputs and outputs, they found that the average person processes about 12 cups of water each day. Without enough water, our physical and cognitive functions decline. Without any, we die within a matter of days. In this way, humans are more dependent on water than many other mammals are.²

Exactly how much water is healthy differs between populations and even from person to person. Currently there are two different recommendations for water intake, which includes water from food. The first, from the U.S. National Academy of Medicine, recommends 15.6 cups of water a day for men and 8.4 cups for women, while advising pregnant and lactating women to increase their intake by about 1.5 to 3 cups, respectively. The second, from the European Food Safety Authority, recommends 10.5 cups for men and 8.4 cups a day for women, with the same increases for pregnant and lactating women. Men need more water than women do because their bodies are larger and have more muscle on average.³

Regardless of how much water you drink, choose wisely. Depending on where you live, the tap water may or may not be potable. Even potable tap water has tested out to contain minute amounts of contaminants, and nano-plastics are a global issue.

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Ditch single use plastic bottles, drink more absorbable and hydrating PiMag® water and share your knowledge of smart hydration with everyone!

1 today.duke.edu/2021/03/humans-evolved-be-water-saving-ape#:~:text=That%20water%20needs%20to%20be,than%20our%20closest%20animal%20cousins.

2, 3  https://www.scientificamerican.com/article/human-evolution-led-to-an-extreme-thirst-for-water/#:~:text=Without%20enough%20water%2C%20our%20physical,adapted%20to%20quench%20that%20thirst