Electrolytes 101

A simple, science‑backed guide to understanding hydration and how electrolytes support your body.

What Are Electrolytes

Electrolytes are minerals that carry an electric charge and help regulate fluid balance, muscle function, and nerve signalling. They’re found in your blood, sweat, and inside every cell.

Main electrolytes include:

• Sodium
• Potassium
• Magnesium
• Calcium
• Chloride

Why Electrolytes Matter

Hydration isn’t just about drinking water. Electrolytes determine how well your body absorbs and uses that water. They support muscle contraction, nerve function, and overall performance.

When You Need Electrolytes

Most days, water and normal meals are enough. But electrolytes become essential when you lose minerals through sweat or illness.

• Training for long periods
• Exercising in hot weather
• Sweating heavily
• Feeling cramps or fatigue
• Recovering from illness
• Feeling “drained” after workouts

Water Alone Isn’t Always Enough

During heavy sweating, drinking only water can dilute sodium levels. This can lead to headaches, nausea, weakness, and reduced performance. Electrolytes replace what you lose and keep hydration balanced.

The Key Electrolytes & What They Do

• Sodium — regulates fluid balance and supports nerve/muscle function
• Potassium — balances sodium and supports heart rhythm
• Magnesium — helps muscles relax and supports energy production
• Calcium — essential for muscle contraction and nerve signalling

Daily Hydration Basics

Most adults should aim for enough fluid to keep urine a pale yellow. Electrolytes aren’t required every day — only when conditions justify them.

• Normal day → water
• Hot day or long training → electrolytes
• Illness → electrolytes
• Heavy sweaters → electrolytes more regularly

Why Choose Unflavoured Electrolytes

Most sports drinks contain sugar, sweeteners, flavours, and colours — none of which improve hydration. Unflavoured electrolytes give you clean hydration without unnecessary additives.