What makes us different
Five things a research-backed, mail-in sweat analysis does that an at-rest stimulation, a single static number, or a mix company’s funnel can’t. The data does the bragging.
The common in-person test stimulates sweat from a resting forearm with a small electrical current. The chemistry correlateswith exercise — but it isn’t the fluid you actually lose.
SweatScans reads an absorbent patch worn through a real workout, under your real effort and conditions. We measure what came out of you, not what a 9-volt current pulled from a resting arm.
Sweat induced at rest in a clinic. One sodium number, no activity behind it.
The real fluid you lose during a long, hot training effort — your conditions, your chemistry.
A concentration alone — milligrams per litre — can’t tell you what to replace. You need volume too. So the kit builds in the published gold-standard mass-balance protocol: weigh in dry, log what you drink, weigh out.
Concentration, volume and duration together give the one number that drives every fueling decision — your sodium-loss rate.
A patch reads concentration at one spot on the skin, and a regional reading systematically runs higher than your whole body. The fix is a published correction — and most testers just apply it quietly behind a single number.
We show both values and the equation we used. No black box. Serious athletes and coaches respect transparency; you can check our math.
Whole-body [Na⁺] from your forearm reading via the Baker 2016 regressionBaker et al., 2016 — forearm-to-whole-body sweat sodium regression (slope 0.57, intercept 11.05, applied in mmol/L).
Your profile is only useful if it tells you what to do on the day. We turn your loss rate into an hour-by-hour fluid and sodium plan, scaled to the effort and conditions you’re racing into.
As the forecast moves in race week, the plan moves with it — so you start with a number for every hour, not a hunch.
| Hour | Fluid | Sodium |
|---|---|---|
| Hour 1 | 750ml | 1,100mg |
| Hour 2 | 850ml | 1,250mg |
| Hour 3 | 950ml | 1,400mg |
| Hour 4 | 1,050ml | 1,500mg |
The other testers are electrolyte-mix companies — testing is how they sell you their product. Every result points one direction: theirs.
We don’t make a mix, so we have nothing to funnel you toward. Your plan recommends across every major brand, chosen to match your number — not ours.
Names are picked to fit your measured loss rate. We earn on the test, not on what you buy to fix it.
Get your number
Mail-in. Measured. The sodium number you fuel against, and a race-day plan that moves with the forecast.
All product names, logos, and brands are property of their respective owners. SweatScans is independent and is not affiliated with, endorsed by, or sponsored by any electrolyte brand. Product references are for informational purposes only. Example figures shown are illustrative; your results depend on your own measured sweat profile and conditions.