Mixed mineral crystals: coarse sea-salt cubes, translucent potassium and pale magnesium flakes. ← The FormularyMuscle & performance

Electrolytes

Also known as Sodium · potassium · magnesium
AEVIDENCE

Sweat has consequences. This is the fine print.

The honest take
The least glamorous product in the Formulary, and probably the one you'll reach for most. Plain water isn't always enough — sweat hard, dance all night, travel, or wake up parched and you're losing sodium and potassium too, and replacing only the water can leave you flat. Electrolytes are the unsexy fix that makes everything else work better.
What it is
The minerals you lose in sweat — sodium, potassium, magnesium, calcium.
How it works
Sodium, potassium, magnesium and calcium are the minerals that let your cells hold water and your muscles and nerves fire cleanly. Sweat carries them out; replacing them lets your body actually retain the fluid you drink instead of running it straight through.
What it does
Support normal hydration and fluid balance around training, heat, travel and long nights.
Who it's for
Anyone training hard or in heat, anyone who sweats through a shirt, frequent flyers, and — plainly — the morning after a long night. Genuinely broad.
How to use it
One serving in water around heavy sweating, travel, or first thing on a rough morning. Caffeine-free, so time it whenever you need it, bedtime included.
What to expect
You notice it most when you've been missing it — steadier energy through a hot session, fewer cramps, a less shattered morning after. Same-day, felt, unglamorous.
The research
Grade A for the basics: electrolyte replacement supports hydration and rehydration, especially around exercise and heavy sweating. Well established and uncontroversial.

Evidence grades describe how well an ingredient is studied — A well-supported, C emerging — not a promise of results. Educational, not medical advice. Doses are typical ranges; follow the label on the product.