I’ll be honest... I’ve spent most of my adult life mildly dehydrated and fully caffeinated. Water is one of those things we all know we should be better at, but between work, kids, and trying to keep everything moving, it’s easy to default to coffee on repeat and call it a day.

So, when I finally started paying attention to my water intake, I had a new question: We hear all the time about dehydration… but can you actually overdo it?

The short answer is yes. The more useful answer is that most of us aren’t even close to having that problem.

There is a real condition called Hyponatremia, where drinking excessive amounts of water dilutes the sodium in your blood. Sodium helps regulate fluid balance, and when levels drop too low, it can cause symptoms like nausea, headaches, confusion, and in rare, severe cases, more serious complications.

But context matters. This isn’t something that happens from carrying around a water bottle and trying to drink more throughout your day. It’s typically seen in endurance athletes who overhydrate during long races or in situations where large amounts of water are consumed quickly without enough electrolytes. For the average person, especially if you’re someone who admits to being a “chronic under-hydrater like me,” this isn’t the risk to focus on.

What’s far more common is simply not drinking enough.

Hydration guidance hasn’t always helped. The classic “eight glasses a day” rule is easy to remember, but it doesn’t reflect how different our needs actually are. Factors like body size, activity level, climate, pregnancy or breastfeeding, and even how much caffeine you’re drinking all play a role. Health organizations like Health Canada and the Mayo Clinic generally point to a broader range, roughly 2-3 litres of fluids per day for many adults, as a starting point, with the understanding that this should flex based on your day-to-day life.

That’s where most of us get stuck; not in the science, but in the execution.

Because hydration isn’t just about how much you drink, it’s about how your body uses it. If you’ve ever tried to “catch up” by chugging a litre of water at once, you’ve probably noticed it doesn’t quite work. You feel temporarily full, then end up in the bathroom shortly after. That’s because your body absorbs water more effectively when it’s spaced out over time, not forced in all at once.

A better way to approach it is to build it into the rhythm of your day. Drinking a glass of water when you wake up, another while getting the kids ready, one mid-morning, one with lunch, and one in the afternoon is far more effective, and realistic, than trying to hit a perfect number all at once. It shifts hydration from something you have to think about into something that just happens in the background of your routine.

It also helps to understand that not all fluids are doing the same job. Coffee absolutely counts toward your fluid intake, but it’s not a perfect substitute for water. Caffeine has a mild diuretic effect, and more importantly, it tends to replace water rather than complement it. If most of your intake is coming from coffee or black teas, you’re likely still operating at a deficit.

This is where small adjustments matter more than big overhauls. Adding a few consistent glasses of water into your day, without trying to eliminate coffee entirely, is often enough to noticeably improve how you feel. Better energy, fewer headaches, more stable focus. Nothing dramatic, just… better.

There’s also a piece of this that gets overlooked: hydration isn’t just about water alone. Electrolytes like sodium, potassium, and magnesium help your body retain and use the fluids you’re drinking. In everyday life, you’ll usually get enough of these through food. But during hot weather, intense exercise, or stages like pregnancy and breastfeeding, being mindful of electrolyte balance can make a difference in how hydrated you actually feel.

If you’re looking for a quick reality check, your body already gives you one. Urine colour is one of the simplest indicators we have. Pale yellow generally means you’re well hydrated. Darker yellow is a sign to drink more. Completely clear, consistently, can mean you’re overdoing it. It’s not a perfect system, but it’s a practical one.

So, where does that leave the question that brought me here?

Yes, it’s possible to be too hydrated, but it’s not the problem most of us need to solve. For many of us, the real work is just getting to a baseline where hydration is consistent enough to support how we actually live.

If you’re currently running on coffee and the occasional glass of water, you don’t need to aim for perfection. You need to build a pattern. Even getting to four or five solid glasses of water spaced throughout your day can shift your energy and focus in a noticeable way.

From there, you adjust. Because hydration isn’t about hitting a number, it’s about creating a rhythm your body can rely on.

Exercise and fluid replacement. (2007). Medicine & Science in Sports & Exercise, 39(2), 377–390. https://doi.org/10.1249/mss.0b013e31802ca597

Government of Canada. (2021, August 12). Facts on fluids: How to stay hydrated. Facts on fluids: How to stay hydrated - Canada.ca. https://www.canada.ca/en/department-national-defence/corporate/news/regional-news/western-sentinel/2021/08/facts-on-fluids-how-to-stay-hydrated.html

Hyponatremia - am I at risk?. Cleveland Clinic. (2025, December 24). https://my.clevelandclinic.org/health/diseases/17762-hyponatremia

Mayo Foundation for Medical Education and Research. (n.d.). Water: How much should you drink every day?. Mayo Clinic. https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/water/art-20044256

Lead photo by Andres Siimon / Unsplash.