What Dehydration Does To Your Blood Sugar
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The episode, word for word
You know what's wild?
People with type 1 diabetes drink more water during exercise than people without diabetes. And we're still thirsty at the end.
There was a study of 45 people with T1D working out. They drank 20 ounces of water per hour. Non-diabetics? Twelve ounces. We drank almost double. And yet, 84.4% of us still felt thirsty when it was over.
That's not a hydration problem. That's a diabetes problem.
Standard hydration advice, eight glasses a day, drink when you're thirsty, you'll be fine, was never designed for bodies that pee out glucose and water every time blood sugar goes high. It's like trying to follow IKEA instructions for a bookshelf when you're actually building a spaceship.
Today we're talking about why the advice you've been hearing your whole life doesn't work for us. And what actually does.
My name is Neil Greathouse, and this is Your Best T1D Year.
Alright, if you're just joining us, welcome. You're listening to Week 1 of the Hydration Challenge: Refilling What T1D Drains. And don't worry, you're not behind. You can jump in right now. We're all just trying to drink more water than we did yesterday. That's the bar.
So here's the problem with standard hydration advice.
Most of it comes from research on people without diabetes. People whose bodies don't dump glucose into their urine when blood sugar goes high. People who aren't running a 24/7 dehydration cycle just from existing.
The classic advice is: drink eight glasses of water a day. About 64 ounces. Drink when you're thirsty. You'll be fine.
But that advice assumes your kidneys aren't in overtime. It assumes you're not losing water every time your CGM says 180. It assumes your body's hydration system works the way it's supposed to.
For us? It doesn't.
There's a study out of Austria, published in the Annals of Nutrition and Metabolism, that looked at 45 people with T1D during exercise. Researchers measured how much they drank, how hydrated they were, and how they felt afterward.
Here's what they found: people with T1D drank 0.60 liters per hour. That's about 20 ounces. Non-diabetics in similar studies? They drank 0.37 liters per hour. About 12 ounces.
We drank more. And yet, 84.4% of us still felt thirsty at the end of the workout.
Let that sink in. We out-drank the control group by nearly double, and we were still dehydrated.
Why? Because while we're drinking water, we're also losing water through osmotic diuresis. High blood sugar during exercise means our kidneys are flushing glucose. And glucose drags water with it. So we're drinking, but we're also leaking. It's like trying to fill a bathtub with the drain still open.
And here's the kicker: the study found that thirst isn't a reliable hydration cue for people with T1D. By the time you feel thirsty, you're already behind. Your body's already dehydrated. You're playing catch-up.
So standard advice, "drink when you're thirsty", doesn't cut it. You need to drink before you're thirsty. You need to drink more than you think you need. And you need to accept that your hydration needs are just different.
You can't fix the fact that you have an autoimmune disease. You can't reverse the damage to your beta cells. You can't make your pancreas work again. But you can fill your water bottle before your workout. You can drink an extra cup in the morning. You can set a reminder on your phone to hydrate every two hours.
That's not a home run. That's getting on base. And getting on base is how you win the game.
You ever feel like managing T1D is hard enough, but getting care is a second full-time job?
That's why Blue Circle Health exists. Most people with type 1 are fighting two battles, one against the disease, and one against the healthcare system. BCH was built to solve that second part.
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Alright, here's your challenge for today, and for the weekend: set a hydration alarm on your phone.
Pick three times during the day. Morning. Midday. Evening. When the alarm goes off, drink one cup of water. That's it. You're not chugging a gallon. You're not trying to be a hydrohomie influencer. You're just drinking three cups spread out across the day.
Track it in your Notes app. Post your water bottle to your Story and tag @thebetes. Use the hashtag #RefillWhatT1DTakes.
And if you haven't signed up for the challenge yet, go to yourbestt1dyear.com. Over 1,100 people are already in. You're not behind, you can start right now.
Look, I know this sounds simple. Maybe too simple. You're dealing with insulin, carbs, CGM alarms, insurance battles, and someone asking you if you can eat that cookie. Hydration feels like the least of your problems.
But here's the truth: T1D is relentless. You can count every carb perfectly and still have a bad day. You can dose your insulin to the tenth of a unit and still go high. You can do everything right and still feel like you're losing.
But hydration? That's one thing you actually control. You can't fix your pancreas. You can't rewrite your immune system. But you can drink more water. And when you do, your insulin works better. Your CGM reads more accurately. Your brain thinks clearer. Your kidneys get a break.
You don't need perfection. You just need progress. One cup at a time.
Week 1 badge drops Sunday. I'll see you Monday for Week 2.
You shouldn't have to follow hydration advice that was never designed for diabetes. And by Week 3, you won't feel like you're drowning in thirst after every workout.
Type 1 diabetes is relentless, but managing it doesn't have to be. New episodes drop every Monday, Wednesday, and Friday.
You're not doing a bad job, you're doing a difficult job. Nobody remembers easy.
Estimated "Shouldn't/Won't" Placement: (End of encouragement closer) BCH Ad Length: 25 seconds Challenge Name Mentioned: "Hydration Challenge: Refilling What T1D Drains" "You're Not Behind" Language: Twice (intro + CTA)
Humor Style: Dry (Bateman), observational (Fey) Encouragement Style: Warm, grounded (Ted Lasso) "You Can't Fix X, But You CAN Do Y": Expanded in closer Brand Name Drops: IKEA, @thebetes, yourbestt1dyear.com
Week 56
Mar 9 - 167
This is the script as read on the mic, lightly tidied for reading. Education, not medical advice. Talk to your care team before you change anything about your insulin.