Your calf seizes up at 2 am. You stand too fast and the room tilts. You blame tiredness, or the dose, or a rough week.
There might be a simpler explanation. Electrolytes on GLP-1 treatment often run low, and the signs are easy to miss.
Sodium, potassium, and magnesium are the main culprits when their levels drop. Learn how to recognise the signs early and what steps to take next.
What Do Electrolytes Do in Your Body?
Electrolytes are minerals that carry an electrical charge. You'll find them in your blood, your sweat and the fluid inside every cell.
They take care of four important things:
- Fluid balance: They help regulate fluid balance in your cells and tissues
- Muscle and nerve function: Your muscles contract and your nerves fire on tiny electrical currents
- Blood acidity: They keep your blood from becoming too acidic or too alkaline
- Heart rhythm: They keep your heartbeat regular
The Six Essential Electrolytes
Every mineral has a specific role. Here’s the short version:
- Sodium helps regulate how much water your body holds onto
- Potassium helps keep your heart rhythm steady
- Chloride pairs with sodium to keep your fluid balance steady
- Magnesium helps your muscles relax after they contract
- Calcium sets off muscle contraction and blood clotting
- Phosphate helps your cells store and release energy
Why Electrolytes on GLP-1 Medication Run Low
GLP-1 medication slows down your digestion and reduces your appetite. This helps with blood sugar control and weight loss, but it also means you absorb fewer minerals.
Here are four things that usually happen at the same time:
- You eat a lot less. If you eat about a third of what you normally do, you’ll also take in about a third of the minerals you usually get.
- Nausea, vomiting, and diarrhoea can make you feel weak. These stomach issues can quickly deplete your sodium and potassium levels.
- You might not feel thirsty. GLP-1 medication can reduce your thirst just like it does your hunger, so you might drink less without realising it.
- You lose weight quickly. When you lose weight, you also lose water and minerals.
Your stomach also takes longer to empty. Food and drink sit in your stomach longer, which can make you feel nauseous and overly full.
Electrolytes on Mounjaro During Dose Increases
Mounjaro works on two hormones in your gut, which makes your appetite go down a lot. The biggest drop in appetite happens in the days after your injection.
When your doctor increases the dose, your appetite drops again.
The two times when you’re at the most risk are during the first two weeks and every week when your dose goes up. Your electrolyte levels are most likely to drop during those periods while you’re on Mounjaro.
Signs of Electrolyte Imbalance to Watch For
Low electrolyte levels are hard to spot at first. The signs come on slowly, and they feel like ordinary tiredness.
Keep an eye out for:
- Muscle weakness that developed within the past month
- Muscle cramps or spasms, usually in your calves and feet
- Palpitations or a skipped beat
- Headaches or dizziness when you stand
- Brain fog and poor concentration
- Constipation
- Dark urine
One sign by itself doesn’t say much. But if you see three signs in the week after a dose increase, it’s worth paying attention to.
When to Speak to Your Healthcare Provider
Some symptoms need more than a diet tweak. Call your healthcare provider if palpitations persist, you faint, or vomiting doesn't stop.
Call your healthcare provider if symptoms last beyond a day or two. A blood test can confirm an electrolyte imbalance.
Check with your prescriber before you add any supplement, especially if you have a kidney or heart condition.
How Much Water Should You Drink on GLP-1 Medication?
It’s recommended to drink 2 to 3 litres of fluid each day for people on these medications. That’s about eight 330ml bottles, which can feel like a lot when you don’t have much of an appetite.
Here’s how to make it easier:
- Sip throughout the day. A glass every hour is better than trying to drink a litre all at once.
- Have a glass before your injection, so you’re hydrated before your appetite drops.
- Take it slow if your stomach feels full. Sipping is easier than gulping.
- Remember that tea, herbal drinks, and juice count towards your water intake.
Most people find it easier to drink more in the morning. So, try to get in more fluids then, while you still feel like it.
How to Replenish Electrolytes Through Food
Whole foods help replace the three minerals you lose the most. You can find them in these foods:
- Sodium: Most of your sodium comes from processed foods, so cutting back on those helps reduce your intake. Add a little salt to your home cooking, like on eggs or in soup, to bring it back.
- Potassium: Fresh fruits and vegetables are your best sources. Spinach, beets, bananas, oranges, avocados, and tomatoes are all great options.
- Magnesium: Look for nuts, seeds, dark chocolate, leafy greens, and whole grains. Pumpkin seeds are especially high in magnesium.
Protein Brings Minerals Along With It
Dairy, fish and pulses provide potassium, magnesium and calcium alongside their protein. Choosing protein-rich foods can help provide those minerals at the same time.
Dietitians often suggest 1.2 to 2.0 g of protein per kg of body weight each day.
You'll need your body mass index (BMI) to pick the right weight for that calculation. To find it, divide your weight in kilograms by your height in metres, then divide by your height again.
With a BMI under 30, use your current weight. At 30 or over, use your goal weight instead, or the number will come out higher than you need.
Consider someone who weighs 70 kg with a BMI under 30. They'd aim for 84 g to 140 g of protein daily.
How to Choose an Electrolyte Drink
Store-bought electrolyte drinks can vary quite a bit in their ingredients. Here’s what to keep in mind:
- Choose drinks with less sodium. Too much salt can lead to bloating and water retention.
- Look for potassium, magnesium, and calcium. These minerals are great for muscle and nerve function.
- Avoid sugar. Drinks high in sugar can raise your blood sugar levels, which can counteract the benefits of your medicine.
Be cautious with sports drinks. They’re designed for athletes who lose salt through sweating, while your losses come from eating less.
Top Up Your Potassium With EXALT Cold-Pressed Juice
Cold pressing extracts juice from fruits and vegetables without using heat. Since heat can break down some vitamins, this method helps keep more of them intact.
Drinking a glass of raw-pressed juice can boost your daily potassium intake, but it won't replace the sodium lost from vomiting.
The EXALT 7-Day GLP-1 Nutrition Support Plan combines cold-pressed juices and super shots with high-protein smoothies. A registered dietitian created it for those weeks when your appetite is at its lowest. The plan uses whole ingredients, avoiding powders and fillers.
When managing electrolytes on GLP-1 treatment, focus on fluids, salt, and fresh produce. Check out the 7-Day GLP-1 Nutrition Support Plan to keep your protein and potassium levels up throughout the week.
