The importance of electrolytes and hydration

With the heat wave we've been having lately, the topic of hydration and electrolytes seemed relevant. If you've spent any time on social media recently, you've probably noticed electrolyte packets being advertised everywhere. They're often marketed as the secret to better hydration, more energy, and improved performance. But do you actually need them?

Let's start with the basics.

Electrolytes are minerals that carry an electrical charge when dissolved in water. The main electrolytes are sodium, potassium, magnesium, calcium, and chloride. These minerals play a vital role in keeping our bodies functioning by helping with hydration, muscle contractions, nerve signaling, heart rhythm, fluid balance, and maintaining a healthy pH balance. To simplify it, without electrolytes, our muscles, including our heart, wouldn't be able to contract properly.

As you've probably heard us coaches say countless times, staying hydrated is one of the best things you can do for your health and performance. Since the human body is made up of about 60–70% water, it relies on adequate fluid intake to function properly. Every day we lose water through breathing, sweating, and using the restroom, so it's important to consistently replace those fluids. A good general goal is to drink about half your goal body weight in ounces of water each day.

When people think of electrolytes, they usually think of sports drinks or electrolyte packets. While those products do contain electrolytes, they're far from the only source. We naturally get electrolytes every day from foods like table salt, fruits, vegetables, dairy products, and even coconut water.

So why have electrolyte packets become so popular?

Because electrolytes are essential, it's easy to assume that more must be better. But that's not usually how nutrition works. Supplements are designed to fill a gap or meet an increased need, not provide extra amounts of nutrients that we're already getting enough of.

Magnesium is a good example. Many people don't get enough magnesium through their diet, so supplementing can improve sleep, reduce fatigue, and support muscle function. However, if you're already meeting your magnesium needs, taking more typically doesn't provide additional benefits because your body simply excretes the excess.

Sodium, however, is a different story.

Unlike magnesium, most people aren't deficient in sodium. In fact, research shows that nearly 90% of adults consume more sodium than recommended because it's already found in so many everyday foods. That means many people are paying extra for electrolyte packets that provide something they're already getting plenty of. Unlike some nutrients, consistently consuming more sodium than your body needs isn’t harmless. It may increase stress on your kidneys, blood vessels, and heart over time.

Many electrolyte drinks and packets also contain several hundred milligrams of sodium in a single serving. For example, a bottle of Gatorade contains around 320 mg of sodium, while many electrolyte packets contain even more. For the average healthy adult who eats a balanced diet and exercises for about an hour each day, that extra sodium isn't necessary.

Does that mean electrolyte packets are bad?

Not at all. They're simply designed for a specific purpose.

They can be especially helpful if you:

• Have low blood pressure or POTS.

• Train or work for long periods in hot environments.

• Are an endurance athlete exercising for three or more hours with heavy sweating.

• Have been advised by your healthcare provider to increase your sodium intake.

Endurance athletes can lose anywhere from 300–700 mg of sodium every hour through sweat. In those situations, replacing fluids with water alone isn't always enough. Drinking large amounts of plain water without replacing sodium can dilute blood sodium levels, leading to fatigue, muscle cramps, and decreased performance. For these athletes, electrolyte supplementation can be an excellent tool for maintaining hydration and performance.

For most people, though, meeting sodium needs isn't difficult. If you've had an especially sweaty workout or spent several hours outside in the summer heat, simply adding an extra pinch or two of salt to your meals is often enough to replace what you've lost. Products like LMNT and other electrolyte mixes can certainly be convenient, but they're not necessary for the average person.

Don't let marketing convince you that everyone needs an electrolyte packet every day. Unless you have unusually high sodium losses or a medical reason to increase your electrolyte intake, you're likely already getting the electrolytes your body needs from food.

Instead, focus on the basics:

• Drink enough water.

• Eat a balanced diet with plenty of whole foods.

• Replace electrolytes when you've actually lost them through prolonged sweating or when your healthcare provider recommends it.

For most gym members, those simple habits will do far more for your health, hydration, and performance than an expensive packet mixed into your water bottle.

Have other nutrition questions you'd like to discuss with a coach? Our team would love to help! Head here to schedule a meeting with us.