Electrolytes: The Supplement That Exploded in Searches — Do You Need It?

The fastest-growing fitness product in this year's searches isn't protein or pre-workout: it's the humble electrolyte — nearly +2,000% interest. Like every phenomenon, it deserves interrogation: real need or hydrated marketing?

What electrolytes do

Sodium, potassium, magnesium and chloride regulate fluid balance, muscle contraction and nerve impulses. When sweat takes too much and you replace only water, concentration drops — and in come the cramps, early fatigue, dizziness and melting performance. In extreme cases (long events + liters of plain water), hyponatremia is a real risk.

When replenishment makes a REAL difference

• Sessions of 90+ minutes with heavy sweat — especially in the heat.
• Salty sweaters: a white-stained shirt after training is sodium's signature.
• Two-a-days, endurance events, combat sports cutting weight.
• Low-carb/fasting diets: less insulin = kidneys dumping sodium. The "low-carb flu" is largely missing salt.

When it's expensive water

A 45-60 minute session in air conditioning with normal meals: your plate already replaces everything. The body doesn't store the surplus — it urinates it, at boutique prices per liter. Marketing loves selling solutions to problems lunch already solves.

How to use it (when it makes sense)

• Target: ~500-1000 mg of sodium per hour of long, sweaty effort.
• Basement homemade formula: 1 L water + 1/2 tsp salt + squeezed lemon + ice. Costs cents.
• Store-bought: choose SUGAR-FREE (unless you need carbs in the session) and with magnesium in the formula.
• Frequent night cramps? Investigate magnesium and daily hydration before blaming genetics.

Verdict

A legitimate tool with a specific use case — long effort, heat, heavy sweat — and elegant waste outside it. I carry electrolytes on long summer patrols and drink water on short ones. Fit the arsenal to the mission, not to the ad.