What role do electrolytes play in the body? Why should you replenish them?

Although electrolytes are essential to the body, not everyone realises how important they are or that they need to be replenished — not only during physical activity, but also in everyday situations, such as during hot weather. That’s why we’ve put together a quick guide to explain how they work, along with some practical tips.

Electrolytes – functions, properties, examples

What is an electrolyte? Technically, it’s a substance that can conduct electricity in ionic form. In more practical terms, electrolytes are aqueous solutions of salts, acids and bases that are crucial to the human body. They are present in blood and body fluids, helping maintain fluid-electrolyte balance.

Electrolytes impact the condition and function of many organs, including the brain and heart. They also affect the performance of major systems, such as the nervous system and muscles. That’s why a deficiency can negatively affect your overall condition. The most important electrolytes found in many hydration drinks include:

• Potassium – supports the heart and muscles. It also plays a role in burning proteins and carbohydrates, affecting metabolism.
• Magnesium – aids muscle contraction and relaxation, contributes to cell repair and maintenance, and supports bone and tooth health.
• Sodium – crucial for maintaining proper hydration. It's especially important for runners and people doing cardio workouts, but a proper sodium balance matters every day.

Of course, the importance of electrolytes goes far beyond these points. While it’s impossible to list every function, they clearly support energy metabolism and help fight fatigue and tiredness.

And don’t forget: proper hydration! It’s surprisingly easy to become dehydrated — not just during workouts. Heat, illness (especially with fever), and daily physical activity can all deplete fluids and key nutrients if you're not replenishing them regularly. This can lead to numerous health issues.

How to replenish electrolytes – best methods and products 

To maintain a healthy level of electrolytes, start with a well-balanced diet that includes foods rich in sodium, magnesium and potassium. Complement this with proper hydration using the right fluids. And not just water — electrolyte drinks are incredibly helpful. At OSHEE, you’ll find a wide range of products containing essential electrolytes, as well as vitamins like biotin, niacin, and vitamins B6 and B12. These 

In addition to bottled drinks, we offer something new: OSHEE DROP IN ZERO Electrolytes & Vitamins Hydroconcentrate – grapefruit-flavoured and sugar-free. One bottle lets you prepare up to 10 litres of electrolyte drink. It’s a time-saving, convenient way to always have hydration ready.

Even better, the hydroconcentrate has a pleasant grapefruit flavour and contains no sugar — giving you all the benefits of electrolytes without unnecessary calories.

When is electrolyte replenishment especially important?

While you should maintain healthy electrolyte, vitamin and mineral levels every day, there are times when deficiencies are particularly common. Professional athletes and amateur fitness enthusiasts know this all too well.

During intense physical activity, the body loses a lot of fluids — and with them, key nutrients. If you want to train longer, feel energised, reduce fatigue, and recover more quickly, electrolyte drinks are invaluable. And it doesn’t matter whether you’re lifting weights, running, swimming or doing any other form of exercise.

Electrolytes are also essential during hot weather. High temperatures cause your body to sweat, which means you lose not just water, but vital nutrients. That’s why it’s important to drink more water on hot days — and since electrolyte drinks deliver more than just hydration, they’re a natural choice in the heat.

You’ve probably also heard the phrase "electrolytes for a hangover". Do they really help? Since hangovers are often linked to dehydration, yes, they can ease symptoms. The same applies to illnesses accompanied by fever and excessive sweating.

Electrolytes support energy metabolism, help fight fatigue and tiredness, and improve the function of various organs and bodily processes. For all these reasons, it’s worth replenishing them regularly — and OSHEE DROP IN drinks and hydroconcentrates are here to help.