JustElectrolyte

The science

The science,
all the way down

Hydration is simpler than it is made to look, and deeper than a label can hold. Five threads run through everything we make. Skim the short lines, check the figures, and follow any thread as deep as you want to go.

01 · Fluid balance

Why water isn’t enough

Drinking more is not the same as drinking well.

Water is a solvent. What it does depends on what’s already dissolved in your blood.

Your body defends concentration, not volume.

Too much, too fast dilutes the sodium you’re trying to hold.

Line chart showing blood sodium falling as water intake climbs, crossing the 135 mmol/L hyponatremia threshold into a shaded danger zone.
Fig. 1 — Blood sodium falls as water volume climbs. Below 135 mmol/L is hyponatremia.
Key figures
135 mmol/Lthe blood-sodium line below which is hyponatremia
5–51%low blood sodium across screened endurance events
0electrolytes plain water puts back

In this thread

Hyponatremia: when hydration goes too farYou can drink too much water. The named condition, told carefully.Dehydration vs. depletionTwo different problems with two different fixes.Fluid balance 101Osmosis, and why sodium is the master variable.

02 · Absorption

The glucose that moves salt

The most important sugar in hydration isn’t there for taste.

Diagram of the SGLT1 cotransporter: two sodium ions and one glucose molecule crossing the gut wall together, with water following.
Fig. 2 — SGLT1 carries two sodium ions per glucose across the gut wall. Water follows.

Sodium needs a ride across the gut wall. Glucose is the ride.

SGLT1 carries two sodium for every glucose. Water follows.

It’s why Quick Rehydrate, coming soon, has a little dextrose, and nothing more.

Key figures
2:1sodium ions SGLT1 carries per glucose
0 gdextrose in Everyday, which does not rely on the pathway
1978The Lancet called it potentially the most important medical advance of the century

In this thread

Sodium-glucose cotransportThe discovery that moves water.Oral rehydration therapyThe salt-and-sugar solution that saved millions.Why dextrose, not sugarSame molecule family, different job.

03 · Formulation

Why we left everything else out

Everything in the formula has to do a job.

Color, sweetener, acid, flavor — there to make a drink feel like something.

None of it does a job for your body.

One test per ingredient: does it work, or is it out?

An ingredient list with most lines struck through — dyes, added sugar, citric acid, flavors, sweeteners, preservatives — leaving sodium, potassium, magnesium and calcium, plus dextrose in Quick Rehydrate only.
Fig. 3 — The test every ingredient has to pass: does it do a job, or not?
Key figures
4mineral salts in Everyday. Quick Rehydrate adds dextrose.
0added sweeteners, dyes or flavors
1test every ingredient had to pass

In this thread

What “just” meansThe thesis. If you read one, read this.Why no dyesColor does one job, with an evidence trail.Why no added sugarSweetener and color travel together. Everyday carries neither.

04 · Sweat

What your sweat is losing

Your sweat isn’t the same as anyone else’s.

A distribution curve of sweat sodium across people, ranging about 10 to 90 mmol/L, with the high tail above 60 marked as the roughly one-in-five salty sweaters.
Fig. 4 — Sweat sodium across people; the shaded tail above ~60 mmol/L is the salty sweaters.

Sodium loss varies almost ten-fold between people.

Roughly one in five are “salty sweaters.”

Generic guidance fails the people who sweat hardest.

Key figures
~9×range in sweat sodium between people
~1 in 5endurance athletes who are “salty sweaters”
10–90 mmol/Lthe span, low end to high

In this thread

The salty sweaterWhy sweat sodium varies, and how to tell if you’re high.Sweat-rate mathA weigh-in / weigh-out protocol for your own number.Dosing for enduranceDrink to thirst, add sodium when the effort calls for it.

05 · Purity

What’s not on the label

The most important part of an electrolyte never makes the front of the box.

Mineral salts can carry trace heavy metals from the ground they come from.

There’s no US limit specific to supplement heavy metals.

The only honest answer is testing — and showing it.

An illustrative Supplement Facts panel, not our label, with a faint second panel behind it labeled what isn't listed.
Fig. 5 — The panel, and the part of the story a panel never prints. Illustration, not our label.
Key figures
47%of protein powders over a contaminant threshold (2024 study)
0US federal caps specific to supplement heavy metals
4metals the standard test screens: As, Cd, Pb, Hg

In this thread

Heavy metals in supplementsA documented problem, fairly stated.How testing actually worksICP-MS and the Certificate of Analysis.Our testing standardThe full standard is coming.soon

The whole map

Every article, by topic or depth

The threads above are the front doors. Behind them is a growing library — foundations, mechanism and formula, the case for subtraction, purity and safety, and the practical use cases. Start with one of these, or browse the whole thing filtered by what you came for or how deep you want to go.

If you read oneWhat “just” meansFor every dayElectrolytes & daily hydrationFor athletesThe salty sweater

Read the label, then decide

The Everyday Tub’s doses per serving are on its page, with the label.

$22.951.59¢ per finished fl oz · 120 servings

Tastes Like Water™