Survival by Water

How much water do you really drink each day (not counting coffee or tea)?

I tend to think I drink more than I really do. Once I lined up eight bottles of water on the bench to see how much I actually drank (as we can forget if we keep filling up the same glass). Turns out, if I'm not concentrating, it's about 3 bottles of water.

Water is a key part of our daily nutritional requirements to keep our system functioning.  Our bodies use water to help regulate our temperate, hydrate our cells and to help maintain organ function.

It is important to replace water every day.  We lose water through sweating, digestion and yes, breathing. As such we lose about 3 litres a day; we even lose water just by sitting on an international flight (about 1.5 litres).  We can go quite a few days without food, but only about 3 days without water (even then we may suffer some health impacts if we wait 3 days to take a drink).

We need to ensure we have a constant fresh supply as water.   Lack of water is the #1 trigger of daytime fatigue.  A mere 2% drop in body water can trigger fuzzy short-term memory, trouble with basic math, and difficulty focusing on the computer screen or on a printed page.  Drinking water also supports efforts to lose weight.

Thinking about you:

  • How much water are you drinking each day?

  • What strategies do you have in place to help you be consistent in your drinking water consumption? Don't leave it to chance - I've even used an APP that told me I was killing a plant named George if I didn't drink my daily consumption of water (George looked sad if I didn't drink water). Now that was emotional blackmail. I had to delete the APP, I felt too sad. What will work for you?

  • Some people prefer bottled water and others prefer tap (and for some it depends on where the tap water is). What is your preference?


Dennis, E. A., Dengo, A. L., Comber, D. L., Flack, K. D., Savla, J., Davy, K. P., & Davy, B. M. (2010). Water consumption increases weight loss during a hypocaloric diet intervention in middle‐aged and older adults. Obesity, 18(2), 300-307.

Dupont, D., & Krupnick, A. (2010). Differences in water consumption choices in Canada: the role of socio-demographics, experiences, and perceptions of health risks. Journal of water and health, 8(4), 671-686.