Lab-grade sweat analysis

Your sweat, in context.

A lab-grade, mail-in sweat test that turns real exercise sweat into the sodium number you fuel against — and a race-day fueling plan you can actually follow.

Order your first kit See how it works

Lab-grade analysis

Brand-neutral

Science shown, not hidden

Athlete photo

Your resultLab-grade

Sodium loss rate

1,320mg Na/hr

measured during a long, hot training effort

Regional

1,860

→

×0.59

Whole-body

1,100mg/L

Baker et al.
2018

The stakes

The last hour is where the gap shows up — cramps, a heavy fade, a pace you can't hold.

Cramp-prone athletes lose more salt — a risk factor you can measure.

Stofan 2005 · Horswill 2009

Race-day fueling

Your number becomes an hour-by-hour plan.

Your sodium-loss rate scales into a fluid-and-sodium target for every hour of your race — and it stays honest about conditions, because the algorithm weighs the effort you collected the sample during. An easy hour and a hot, hard one don’t read the same.

Works with your training data

Syncs your workoutReads effort & durationAdjusts for heat

Hour-by-hour fueling targetscales to race-day conditions

Hr 1

1,300mg750 mL

Hr 2

1,300mg750 mL

Hr 3

1,350mg800 mL

Hr 4

1,350mg800 mL

5.3g Na total

3.1L fluid total

for a 4:00 effort

Why it’s different

A sweat test that shows its work.

Most tests hand you one at-rest number and a product to buy. SweatScans measures the sweat you actually lose — and shows every step.

Real exercise sweat

Measured during a real effort, not stimulated at rest.

Lab-grade total loss

Patch concentration × measured volume — the mg/hr you actually fuel against.

Whole-body corrected

Raw regional and corrected values both shown, equation cited.

Built for race day

Each number becomes an hour-by-hour fluid and sodium plan.

Brand-neutral by design

Spans every major electrolyte brand — never just ours.

For coaches & clubs

Coaching a team? Every athlete’s profile in one dashboard.

Per-athlete sodium curves, retest alerts as the season heats up, and squad pricing that scales with your group.