How much water should a person drink every day? According to my picky eater friends, the answer is zero, because water tastes bad. Everyone knows that if I don’t like the flavor of something, then it’s unhealthy and I shouldn’t put it in my mouth. The standard answer to the question of how much water to drink is: eight 8-ounce glasses, or 64 fluid ounces per day. Then the standard rebuttal to that is that we don’t actually have to drink that much, because we consume fluids in our food. I’m going to say that all of these answers are wrong.
It’s not nearly enough.
How much we need to drink depends on our size, our base exertion level, the humidity, the altitude, whether we’re traveling via airplane, what we eat, and what workout we may be doing. There are probably other factors, but these are the most noticeable.
I got an app to track my water consumption, because I was having a problem with getting cotton mouth right before bed. This intense thirst would make it impossible not to power-slam a big glass of water, which would then make it impossible for me to sleep through the night. It became my goal to pace myself, hydrating more in the morning so I could stop drinking water after 8 PM. Everything I do for my body is based around whether it improves my quality and quantity of sleep, because I have a very tiresome parasomnia disorder.
Now that I have a few months recorded, I see that I drink an average of 80 fluid ounces per day. The app set me a goal of 60 ounces based on my height, weight, and activity level. For the record, I am 5’4” with a small build and I live in a hot, humid climate.
Anyone who is taller than me, weighs more than 120 pounds, or exercises more than I do should probably be drinking more than that 80 ounces. Even more if they’re on any kind of medication.
It’s important to be skeptical, especially about outrageous health claims. There’s at least a million times more misinformation out there than there is quality information. Skepticism is an inner compass that can be used to experiment and test hypotheses. We can use this power of the mind to find ways to live a better, easier life. I was always very skeptical about claims that drinking lots of water is healthy, and I might go days at a time without actually drinking plain water. I was a big soda drinker instead. That’s what low-level skepticism can do for us. It can convince us that our terrible habits are good for us, because we like them and they come naturally to us, while at the same time convincing us that healthy habits are bad for us, because they’re annoying and they go against our proclivities. A skepticism that drives us further in the direction of our biases is not skepticism at all. It’s nothing more than a self-serving emotional validation tool.
What we want to do is to look at our results and try to amplify everything that is working well, while mitigating anything that is working less well. More of the good and helpful, less of the bad and painful.
The first thing that convinced me that maybe what I was doing wasn’t working so well was the idea that I could compare my results to the results of an elite. In this case, I’d be looking at elite athletes and at people with elite longevity, i.e. centenarians. What did these people do differently than I did? I noticed that athletic people universally all drank lots of water. I didn’t drink lots of water, and I was far from being an athlete. Correlation or causation?
What I learned when I started distance running was that hydration wasn’t actually a choice anymore. Intense exercise activates a thirst you’ve never known. It’s physically impossible to run for several miles and not feel thirsty afterward. You also start to learn that you have to drink before you feel the thirst. I felt vindicated with my hydration habits when I ran my marathon without bonking.
A Kaiser doctor told me once that dizziness comes from dehydration. I had called in to the advice line when I had the flu. In the past, I had had a problem with occasional random dizzy spells, and I’d even fainted a few times. That was back when I was working a full-time job while also attending school full time. It clicked for me that if dehydration causes dizziness, and I used to feel dizzy a lot, and I basically never drank water... maybe that was the answer? Maybe it was really as simple as that?
What I’ve noticed from drinking more water:
I used to always have dark circles under my eyes, and now they’re gone, even though I’m twenty years older
I sleep better, when I’ve had insomnia problems since I was seven years old
My skin is clearer
I have at least 10x more energy
I don’t crave sweets as much
I haven’t had a migraine in nearly four years, when I used to get them several times a week
I weigh 35 pounds less than I did when I drank soda instead of water
I’m stronger and fitter than I’ve ever been in my life
All of this could be a coincidence. Maybe it’s not my water consumption at all. Maybe I’m enjoying these benefits due to an astrological influence or a fairy’s blessing. Maybe it’s osmosis from living in a humid climate near the beach. Water is free to me, though. I can pour it straight out of the tap on demand. Drinking more water makes me feel better and helps me not get dry mouth at night. Why not do it? Why not test it out for a little while, at least?
I've been working with chronic disorganization, squalor, and hoarding for over 20 years. I'm also a marathon runner who was diagnosed with fibromyalgia and thyroid disease 17 years ago.