The benefits of electrolytes: Why women on weight loss injections are turning to this hydration hack

If you're on a weight loss journey with support from medications like Mounjaro or Wegovy, you may have noticed that staying hydrated feels more important than ever. And, it's not just about drinking water.

Electrolytes have quickly become a go-to hydration hack for women looking to support their energy, focus and overall wellbeing while on weight loss injections.

But what exactly are electrolytes? And if they make such a noticeable difference, should you be adding them to your routine? Let's explore how electrolytes work, why they matter when you're losing weight, and how to make sure you're getting enough.

What are electrolytes?

Electrolytes are essential minerals found in your blood, sweat and urine that carry an electric charge [1]. They help regulate a wide range of body functions, from fluid balance to nerve signalling and muscle contraction [1].

You're probably familiar with some of the key players:

• Sodium
• Potassium
• Bicarbonate
• Magnesium
• Calcium
• Chloride
• Phosphorus

These minerals are naturally lost through sweat, urine, and — to a lesser extent — everyday metabolism. While we often associate electrolyte loss with intense exercise, it can also occur from dietary changes, illness, or the side effects of medications, including GLP-1 weight loss treatments [2].

How electrolytes work in the body

Your nerve cells, muscles and brain all depend on electrical signals powered by electrolytes. These electrical impulses allow your body to manage heat, stay energised, and maintain proper fluid levels, particularly during hot environments, stress, or dietary changes.

What do electrolytes do?

Electrolytes may be small, but their role in the body is mighty. If you've ever felt noticeably better after drinking an electrolyte mix, it's likely because these minerals were doing exactly what they're meant to. These charged minerals can help:

• Regulate fluid balance - Electrolytes help pull water into your cells and tissues where it's needed most, preventing dehydration and bloating [3].
• Support nerve and muscle function - Your brain and muscles rely on tiny electrical signals. Electrolytes help fire these signals accurately, so your body responds the way it should [3].
• Boost energy and reduce fatigue - Low electrolytes can leave you feeling drained, foggy and sluggish. Replenishing them helps restore energy fast [4].

What causes an electrolyte imbalance?

You don't need to run a marathon to lose electrolytes. Here are some common causes:

1. Dietary gaps - Cutting back on processed foods can reduce sodium intake [5], but if not balanced with other minerals like potassium or magnesium from whole foods, this can create imbalances.
2. Illness of digestive upset - Vomiting or diarrhoea can lead to a rapid loss of fluids and electrolytes [6][7].
3. Medications, including GLP-1s like Mounjaro or Wegovy - Some patients experience nausea, vomiting, or diarrhea (side effects that can increase the risk of dehydration and electrolyte depletion) [8].

This is why many women on weight loss medications report feeling off in the first few weeks. It's not always the medication itself — it could be that your body's electrolyte levels are out of sync.

Low electrolyte symptoms

Electrolyte imbalances can sneak up on you. Here's what to look out for:

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These symptoms can overlap with early side effects of weight loss injections, which is why restoring electrolyte balance is such a helpful step in managing how you feel.

Why do I feel so much better after electrolytes?

Have you ever felt clearer, more energised, and mentally "switched on" within minutes of having electrolyte supplements? You're not imagining it.

Electrolytes help:

• Quickly rehydrate your cells so your body can function properly
• Stabilise blood pressure and glucose levels, both of which can affect your mood and energy [9]
• Improve nerve signalling and muscle function to help you feel more physically in control

Hydration doesn't just affect your body functions. It plays an active role in mental clarity and emotional balance, too.

Electrolytes vs regular water

While plain water is essential, it doesn't always go far enough, especially when you're losing fluids quickly or eating less due to medication.

Key differences:

• Water hydrates, but electrolytes retain hydration by helping water stay in your cells [10]
• Electrolytes support muscle and nerve function, which water doesn't
• If you're drinking a lot of water and you don't replenish lost electrolytes, you might dilute your levels further (and actually feel worse)

For women on appetite-suppressing treatments, where food intake might drop, electrolyte-rich fluids can help by maintaining fluid levels and reducing unpleasant side effects.

How to get electrolytes

There are several ways to top up your electrolytes. Thankfully, you don't have to rely on sports drinks filled with sugar.

Electrolyte powders, tablets, and drinks

These are easy to add to water and come in a variety of flavours and formulas. Look for:

• Low or no added sugar
• Balanced levels of sodium, potassium, and magnesium
• Clean ingredient lists with no artificial dyes or preservatives

Be sure to read labels carefully. Some high-street brands pack in up to 30g of sugar per serve. Aim for formulas with less than 1g of sugar, especially if you're watching your blood sugar or weight.

Everyday foods rich in electrolytes

You can also increase your intake through food:

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These can easily be added to smoothies, snacks, or simple meals. There is no need for complicated meal prep.

When to take electrolytes

Timing can make a big difference. Here's when they may be most effective:

• During the first few weeks of weight loss treatment (especially if you are experiencing nausea or low energy)
• Before or after exercise, to prevent muscle cramps and support recovery
• During illness, such as when you're experiencing vomiting or diarrhea
• First thing in the morning, as many people wake up slightly dehydrated
• On hot days or during travel
• When you're sweating more than usual

Many women find that drinking electrolytes in the morning helps combat early fatigue and support their hydration status for the day ahead. While others prefer a post-exercise boost. You can test what works for your routine.

Is it good to drink electrolytes every day?

A daily serving of electrolyte supplements or an electrolyte drink can help women on GLP-1 medications maintain stable fluid and electrolyte levels, especially if they’re not eating enough to naturally get these essential minerals from a balanced diet.

Just be cautious not to overdo your electrolyte intake. Too much sodium or potassium can lead to symptoms like bloating or, in rare cases, high blood pressure or complications with kidney function, particularly if you’re managing kidney disease or other chronic conditions.

How often is too often?

• Once per day is a safe general rule for most women
• If you're replacing meals or fluids due to nausea, you may benefit from multiple servings per day (just check with your health practitioner or dietitian)
• Tailor your intake to how you feel: if your urine is dark, you're getting headaches, or feeling faint, you may need more hydration support

Support beyond hydration

Feeling flat, foggy, or fatigued on weight loss medication? Electrolytes can help, but long-term success takes more than hydration. That’s where the Juniper Programme comes in.

Designed for women using treatments like Wegovy, our programme goes beyond medication to support your whole body — from hydration and energy to muscle maintenance and mindset.

Here’s what you’ll get with Juniper:

• Prescription medication in all strengths – with guaranteed supply, so you’ll never be left waiting
• On-demand access to Juniper doctors, working closely with you to adjust dosages as your needs change
• A strength and cardio programme, tailored to help preserve muscle while losing fat
• Hundreds of protein-packed recipes, created specifically for patients on GLP-1 medications like Mounjaro and Wegovy
• Free delivery to your door, saving you time and ensuring your medication arrives when you need it
• A holistic app experience to track your weight and side effects

Whether you’re managing hydration, navigating side effects, or looking to maintain energy and motivation, we’re here to help you feel better, not just lighter.

Join thousands of women across the UK who are resetting their weight and reclaiming their health with Juniper.

Frequently asked questions

Still have questions about electrolytes and how they fit into your weight loss journey? Here are some of the most common questions women ask while using medical weight loss treatments.

Do Mounjaro or Wegovy cause electrolyte loss?

They can, especially if you experience side effects like nausea, diarrhoea or reduced appetite. Replenishing electrolytes can help minimise symptoms and support overall well-being.

What are the signs I need more electrolytes?

Fatigue, muscle cramps, dizziness, brain fog, or headaches are all common signs of electrolyte imbalance, particularly if you’re on a weight loss treatment.

Are electrolytes safe to take with weight loss injections?

Yes, they’re often recommended to help manage common side effects. Just check the sugar and sodium content if you’re managing blood pressure or glucose.

Can I use electrolyte drinks instead of meals if I feel nauseous?

Not regularly, but they can help tide you over during short periods of appetite loss. Always aim to reintroduce solid, nutrient-dense meals when you can.

What’s better — electrolytes or plain water?

Both are important. Electrolytes are especially useful when your body needs to retain water or recover from fluid loss. Plain water hydrates, but electrolytes help hold that hydration in your cells.

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