How Many Cups Of Water Should You Drink Per Day

How Many Cups Of Water Should You Drink Per Day
How Many Cups Of Water Should You Drink Per Day

How Many Cups Of Water Should You Drink Per Day

One of my favorite apps is Alarmed. It is set to go off eight times every day. What’s it reminding me to do?

Have a drink of water! As part of a routine I’ve developed, I drink about 1 cup of water eight times a day. My 8-cup daily total (1.9 liters) is just what the doctor ordered for proper hydration.

In the NutritionFacts video How Many Glasses of Water Should We Drink a Day?, Dr. Michael Greger combines scientific data compiled by the U.S. Institute of Medicine, the World Health Organization, and the European Food Safety Authority.

Taken together, their recommended daily water consumption totals:

2 to 2.7 liters (8 to 11 cups) for women

2.5 to 3.7 liters (10 to 15 cups) for men

Dr. Greger clarifies that those figures also include the water in our food. And the Natural Health Research Institute states, “… food usually provides more than half of our daily water requirements.” 

If half our water comes from food, the amount we should drink daily ranges between 4 and 6 cups (1 to 1.5 liters) for women and 5 to 8 cups (1.18 to 2 liters) for men. That’s assuming moderate activity at a moderate temperature.

A Harvard Health article I quoted recently recommended drinking 4 to 6 cups of water per person per day. Averaging this to 5 cups puts it on the low side for men. Including children in the equation, however, makes it a good average for the entire human population.

As to “what the doctor ordered?” Dr. Greger estimates we obtain 1 liter daily from food. That increases the total intake slightly to 4 to 7 cups (1 to 1.7 liters) cups for women and 6 to 11 cups (1.5 to 2.7 liters) for men.

Either way, having Alarmed remind me to drink my 8 cups seems just right for a day of normal activity. But… what if I threw out my routine and only drank water when I’m thirsty?

More on this tomorrow

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