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SOLT
The Heat Index

Why real salt, not twenty ingredients

The back of most hydration packs reads like a vitamin aisle. We went the other way, and left things off on purpose.

9 Jun 2026 · 4 min read

Pick up most electrolyte or "hydration" powders and the ingredient list runs long: a stack of vitamins, a sprinkle of this, a trending extract of that. It looks like value. Mostly it is noise. SOLT is built around real salt and the electrolytes you actually lose, and the reasons we kept each one.

The three, and what they're for.

Sodium and chloride come from real Himalayan rock salt, the salt you lose most in sweat, at 500 mg sodium and around 770 mg chloride per serve. Potassium contributes to normal muscle function. Magnesium contributes to normal muscle function and to normal energy-yielding metabolism. Each one doing a clear, declared job.

What we left off, and why.

Caffeine: a stimulant, not a hydration tool. If you want a coffee, have a coffee. Long vitamin lists: stacking vitamins into a hydration drink does not make it hydrate better, and most people already get them elsewhere. Sugar: classic sports drinks are sugar-led at 20–40 g a serve; SOLT uses none, sweetened naturally instead.

Published, not proprietary.

Every amount is on the pack and on this page, 500 mg sodium, 770 mg chloride, 300 mg potassium, 60 mg magnesium, zero sugar. No "proprietary blend" hiding the doses. If it is in SOLT, you can see how much. That is the whole point.

Less label, more work. We took everything off the panel that wasn't doing a clear job, then put more of what was.

Authorised health-claim references: Potassium contributes to normal muscle function. Magnesium contributes to normal muscle function. Magnesium contributes to normal energy-yielding metabolism.

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