Thirst Is a Lagging Indicator (and Other Things Your Body Won't Tell You in Time)


Water never gets the headlines. After 50, it deserves a few.

Of all the nutrients I write about, water gets the least respect. Protein has a fan club. Fats have warring factions. Carbs have a whole army of critics on social media. Water just sits there in the glass, waiting for somebody to notice it.

In my book, I call water the unsung hero, and I meant it. It keeps nearly every system in your body running smoothly. It helps flush toxins. It helps regulate your temperature. It lubricates your joints and supports digestion.

I like to compare it to the oil in your car's engine. You can drive for a while without enough of it. Eventually, though, everything starts to seize up. By the time you notice the problem, you've already done some damage.

Most of us are running a little low

Most of us walk around in a slight state of dehydration. I picture a houseplant that gets watered just often enough to survive, but never enough to thrive. It doesn't keel over. It just droops a little and never looks quite as good as it could.

The tricky part is that thirst is a lagging indicator. By the time your brain mentions you need fluids, you're already running low. It's like the low-fuel light coming on when you're already coasting into the gas station on fumes.

That late warning gets even later as we age. The body's thirst signal tends to get quieter with the years, so many women over 50 simply don't feel thirsty as often as they used to. Add a few hot flashes or a round of night sweats, and you're losing fluid you may not think to replace. So I don't want you waiting for thirst to tell you what to do. It's a slow messenger.

The bathroom check-in

One of the most reliable ways to check your hydration is to look at your urine. I admit this isn't a typical dinner-party topic. Your doctor gets a pass.

If your urine is pale yellow or clear, you're probably reasonably hydrated. If it looks like strong tea, it's time to drink more water. If it's the color of apple juice or a construction-site warning cone, same advice. And if it's black, skip the water and head straight to the emergency room.

A few things can throw off the reading. Vitamins, herbs, and certain medications can all change the color. Your bladder basically becomes a mood ring, reflecting whatever chemical cocktail you've recently swallowed. So if you just took your multivitamin and things look unusually bright, don't panic. Use the color as a general guide, and watch the pattern over a few days.

Coffee, salt, and other plot twists

Caffeine is a natural diuretic, which means it nudges you toward dehydration. That's an ironic problem, since most of us rely on coffee to reach basic human functionality in the morning. I'm not going to ask you to give up your coffee. I'm not a monster. I'm just asking you to remember it pulls in the other direction, and to give your body some plain water too.

Salt plays a role as well. Sodium makes your body hang on to water, much like a survivalist stockpiling supplies. Watching how much salt you eat helps your body maintain a healthier fluid balance. Most of that salt hides in processed and restaurant food, not the shaker on your table.

And one more connection people miss. If you're dealing with constipation, try drinking more water before you reach for complicated solutions. Your digestive system needs fluid to keep things moving, especially if you're eating more fiber.

How to actually drink more water

Drinking water steadily through the day sounds simple. In real life, it takes the kind of mindfulness usually reserved for meditation retreats. So instead of relying on willpower, set up your surroundings to remind you.

1. Booby-trap your house. Put a filled water bottle in the places you spend the most time. Think kitchen counter, desk, car, and nightstand. It's a well-planned treasure hunt, except the treasure is proper kidney function.

2. Add a slice of lemon. A bottle of lemon water sitting in plain view works like a sticky note to yourself. It has more practical benefits and less paper waste.

3. Drink a glass before your coffee. You're already standing in the kitchen. Let the water go first.

4. Spread it out. Sipping steadily through the day beats chugging a huge glass at 9 p.m. and spending the night walking to the bathroom.

5. Play the drinking game. Every time your husband says something that makes you question your life choices, take a drink. Every time your boss does something that defies logic and human decency, take a drink. Of water, of course. You'll stay hydrated and get a healthy outlet for daily frustration. It's remarkably therapeutic and far healthier than the alternatives.

6. Check the color. Take a quick look once or twice a day. Pale yellow means keep doing what you're doing. Strong tea means grab the bottle off the nightstand.

7. Go easy on the salt. Less sodium makes it easier for your body to keep its fluids in balance.

A quick word about medications and health conditions

If you have heart or kidney problems, or you take a water pill (a diuretic), your doctor may want you on a specific fluid limit. In that case, follow their advice and talk with them before you change how much you drink. The same goes for any medication that affects your fluid balance. More water is a good goal for most of us. Your own doctor knows your situation best.

Progress, not perfection

I'm not looking for nutritional home runs here. I'd much rather see a series of small, steady improvements than watch you try something dramatic and quit by Thursday.

So pick one step from the list. Maybe it's the bottle on the nightstand. Maybe it's the glass before coffee. Do that one thing until it's a habit, then add the next. Your inner houseplant will notice.

If you'd like more on nutrition and the rest of the healthy aging picture, I cover it all in my book, Hot Flashes, Cold Truths. You can find it here: https://a.co/d/0bPrdkyu

Now go refill that glass.