The GLP-1 Side Effect Almost No One Talks About
Millions of people are taking GLP-1 medications for weight loss and diabetes. I was one of them. Here's the side effect I didn't expect and why I wish someone had talked about it sooner.
Before I started taking a GLP-1, everyone talked about how much less I'd eat.
No one talked about how much less I'd drink. It wasn't intentional. I wasn't avoiding water.
I just...stopped thinking about it.
Like a lot of people, I started my GLP-1 journey expecting certain things. I expected my appetite to change. I expected to lose weight. I knew there might be some nausea along the way.
What I didn't expect was that staying hydrated would suddenly become something I had to think about every day.
At first, I didn't connect the dots.
I just knew I didn't feel quite like myself. Some afternoons I was unusually tired. I had headaches that seemed to come out of nowhere. My mouth felt dry. Even my skin looked different. I blamed stress.
Hydration never crossed my mind.
It wasn't until I started paying attention that I realized something simple. I wasn't drinking nearly as much as I used to.
Looking Back, It Makes Perfect Sense
GLP-1 medications are designed to help us eat less. For many, they also change the way we think about food and water throughout the day.
When you're not thinking about your next meal, you're often not thinking about your next glass of water either.
Research shows that people taking GLP-1 medications may be at greater risk for dehydration because they often consume less food and fewer fluids. If you're dealing with nausea, vomiting, or diarrhea, your risk can be even higher.
When I first read that, it sounded like another item on a long list of possible side effects.
Living it felt very different.
Dehydration Doesn't Always Feel Like Dehydration
I think that's the part people miss. Most of us picture dehydration as being incredibly thirsty.
That wasn't my experience. Instead, it showed up in small ways. A lingering headache. Brain fog. Workouts that feel harder than usual. Dry skin. Chapped lips.
They're easy symptoms to dismiss because they don't immediately make you think of dehydration. They're also symptoms many of us blame on getting older, being busy, hormones, or just having a tough week.
Sometimes those things are the reason.
But if you're taking a GLP-1 medication, hydration deserves a place on that list too.
One of the most interesting things I discovered is that I'm far from alone. Spend a little time reading conversations from people taking GLP-1 medications and you'll see the same questions over and over again. Why do I suddenly feel so dry? Why do I have headaches? Why do I feel so run down? Many people only make the connection after someone suggests they may simply be dehydrated.
The Habit I Had to Relearn
The biggest lesson for me wasn't that I needed to drink more water. It was that I couldn't wait until I felt thirsty. Now I try to stay ahead of it. I start my morning with water (and now Ayda). I keep a water bottle nearby instead of assuming I'll remember later.
If I've exercised, spent time outside in the heat, or I'm eating very little that day, I pay even closer attention. Nothing dramatic. Just a few small habits that have made a surprisingly big difference.
The Bigger Lesson
GLP-1 medications have changed a lot of lives, including mine.
But they've also taught me something I wasn't expecting. When you're eating less, the basics matter more: Hydration. Protein. Sleep. Movement.
The little things suddenly have a much bigger impact on how you feel.
Before I started taking a GLP-1, everyone talked about how much less I'd eat.
Looking back, I just wish someone had also told me to pay as much attention to how much less I'd drink.
About the Author
Kristi Bridges is Chief Marketing Officer at Ayda and has spent more than 25 years building health and wellness brands. She's also been taking a GLP-1 medication for several years. This article is based on her personal experience, supported by published research, and is not intended as medical advice.
