Electrolytes: are they worth the hype?

You’ve probably seen your favourite fitness influencer adding electrolyte powder to their water bottle recently, swearing it’s the secret to better energy, performance, and hydration.

Electrolytes have become a wellness buzzword, marketed as essential for everyone from gym-goers to busy professionals. But are they really something we all need to be adding to our daily routine, or is this another case of health and wellness trends distracting us from the real science?

In this blog post, we’ll break down what electrolytes actually are, what they do in the body, who truly benefits from them, and why (contrary to popular belief) they’re not necessary for everyone.

 

What are electrolytes?

Electrolytes are electrically charged minerals that are found in our blood, urine and bodily fluids. Some of the most common examples that are found in the body are sodium, potassium, calcium, magnesium, chloride, phosphate, and bicarbonate. We often lose electrolytes through sweat, urine and other bodily processes.

Electrolytes naturally occur in many everyday foods, such as table salt, olives, bananas, avocados, dark leafy greens and dairy products. 

What do electrolytes actually do? (the science bit)

The National Institutes of Health explains that electrolytes play a crucial role in keeping the body functioning properly. They help to:

• Regulate fluid balance inside and outside cells

• Support muscle contractions (including the heart)

• Enable nerve signalling

• Maintain blood pressure

When electrolyte levels are well balanced, the body can efficiently manage hydration, movement, and energy production. When levels drop too low, or become imbalanced, symptoms like fatigue, muscle cramps, dizziness, or headaches can occur.

 

Who are electrolytes useful for?

In recent years, electrolytes have been heavily marketed as a way for everyone to boost their hydration levels. With great packaging and bold claims around energy, focus, and performance, it’s easy to assume they’re a must have for daily life.

Although a lot of these claims can be accurate for some people, they are not always a necessary addition to everyone's daily routine. 

Electrolytes serve as a great tool for predominantly these situations: 

• Engaging in long, intense, or endurance-based exercise

• Sweating heavily or train in hot environments

• Experiencing prolonged vomiting or diarrhoea

• Following very low-carb or ketogenic diets

• You have a medical condition where electrolyte balance is affected

Why most people don’t need them daily

According to the Harvard T.H. Chan School of Public Health, most people can maintain proper hydration through regular water intake and a balanced diet. For most people, focusing on daily habits that support energy and hydration will have a far bigger impact than adding electrolyte supplements.

In addition to this, our kidneys and hormones work together to tightly regulate fluid and electrolyte balance. 

The kidneys adjust how much electrolytes and water are retained or excreted, while hormones like ADH and aldosterone respond to changes in hydration, sodium, and potassium levels. 

Because of this, adding electrolyte supplements to your water “just in case” doesn’t automatically improve hydration or energy, and in some cases, excess intake (particularly sodium) is likely unnecessary. 

 

Final thoughts

Electrolytes play an essential role in the body, but that doesn’t mean everyone needs to supplement them daily. If you eat a well-balanced diet and engage in moderate levels of exercise, it’s likely you’re already getting enough electrolytes through food and drinks, with your body doing an excellent job of regulating fluid and electrolyte balance on its own.

Before adding an electrolyte supplement to your routine, take a moment to consider the situations in which they’re actually necessary, and whether you truly fall into one of those categories, rather than being swayed by the latest fitness influencer marketing.

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Frequently Asked Questions

What are electrolytes?

Electrolytes are essential minerals like sodium, potassium, and magnesium that help regulate hydration, muscle function, and nerve signals. They play an important role in maintaining fluid balance and supporting normal body function.

Do most people actually need electrolyte drinks?

Most people don’t need electrolyte drinks if they’re eating a balanced diet and staying hydrated. For everyday activity, water and regular meals usually provide enough electrolytes.

When are electrolytes actually useful?

Electrolytes are most useful during intense exercise, prolonged sweating, illness, or dehydration. In these situations, replacing lost minerals can help restore hydration and support recovery.

Can you get electrolytes from food?

Yes, many whole foods naturally contain electrolytes. Foods like bananas, leafy greens, nuts, seeds, and dairy products provide minerals such as potassium, magnesium, and calcium.

Are electrolyte supplements always better than water?

Electrolyte supplements aren’t always necessary and water is usually enough for normal daily hydration. Supplements are typically most helpful during endurance exercise or when significant fluids and minerals are lost.

What are the signs you might need more electrolytes?

Signs you may need more electrolytes can include muscle cramps, fatigue, headaches, or feeling unusually thirsty. These symptoms can sometimes appear after heavy sweating or dehydration.

What’s the best way to maintain healthy electrolyte balance?

The best way to maintain electrolyte balance is by staying hydrated and eating a varied, nutrient-rich diet. Whole foods naturally provide the minerals your body needs to keep things running smoothly.

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Sources

The National Institutes of Health

Harvard T.H. Chan School of Public Health