Your sweat is a data set. We turn it into fuel.
Solute measures how you actually sweat, then engineers a carbohydrate-and-electrolyte formula built for your physiology — not the average of everyone else’s.
Sweat sodium varies ~5–10x between athletes. Yours is measured, not guessed.
Generic hydration is a guess dressed up as a formula
Off-the-shelf sports drinks assume one sweat profile for every athlete. In reality, sweat sodium concentration ranges roughly from 200 to 2,000+ mg per liter between individuals, and sweat rates vary just as widely. A generic formula either under-doses your sodium and carbohydrate — or overdoes it. Neither gets you fueled correctly.
Population range
Illustrative distribution of sweat sodium concentration across athletes. TODO: replace with real aggregate data once available.
How it works
Test, analyze, fuel — three steps from unknown to engineered.
Sweatprint™ Test
We measure your sweat sodium concentration and sweat rate — in person or with an at-home kit.
Analyze
Our engine combines your test results with your intake profile: body weight, sport, session length, climate, and goals.
Fuel
You get a formula matched to your physiology — refined over time as your training and environment change.
What’s in your formula
Every formula starts from the same three-ingredient base, custom-ratioed to you. Optional additives layer on top, matched to your intake and Sweatprint™ results.
The base — every formula
Dialed to your measured sweat-sodium loss from the Sweatprint™ Test.
Primary carbohydrate — a glucose polymer absorbed as glucose via the SGLT1 gut transporter.
Second carbohydrate, absorbed via GLUT5 — raises total hourly carb uptake and eases GI load.
Optional additives — athlete-selected
Strategically timed, typically ~3–5 mg/kg. TODO: substantiation & dosing citations.
Commonly paired with caffeine for smoother, steadier focus. TODO: substantiation.
Potassium, magnesium, calcium, chloride for long or hot sessions and heavy sweaters.
BCAAs / EAAs for perceived fatigue and recovery support. TODO: substantiation.
Buffering for high-intensity efforts. GI tolerance varies — trial before race day.
Emerging endurance-fuel add-on. TODO: substantiation.
For endurance and efficiency support. TODO: substantiation.
Rhodiola, ashwagandha, tyrosine, citicoline for focus and stress resilience. TODO: substantiation.
Who it’s for
Endurance
Running, cycling, triathlon, ultra
Team sport
Long, high-output training blocks and matches
Tactical
Military and special ops, firefighting, law enforcement — heat, heavy kit, high stakes
Everyday
High-sweat exercisers who cramp or bonk on generic mixes
More than a drink brand
Your sweat test is the first data point, not the last
We’re building past the one-time test: multi-condition sampling that predicts your needs across heat and altitude, race-day scenario planning, and adaptive re-testing as you acclimatize — a living model of how you fuel.
Athletes who tested, not guessed
“I stopped cramping at mile 18 for the first time in four marathons. Turns out I was under-salting by a lot.”
TODO: Real Name — Marathoner, sweat sodium 1,450 mg/L
“My old drink mix was giving me GI distress every long ride. The maltodextrin:fructose split fixed it in one bottle.”
TODO: Real Name — Cat 2 cyclist
“As a two-a-day athlete in summer camp, generic electrolyte tabs weren't close to what I was actually losing.”
TODO: Real Name — Collegiate soccer player
Built by a scientist and a systems builder
Nate, an exercise physiologist, designs the science of the Sweatprint™ protocol. Scott built the engine that makes a bespoke formula for every athlete possible at scale.
Common questions
What is a sweat test?
The Sweatprint™ Test measures two things that vary enormously between athletes: your sweat sodium concentration and your sweat rate. We use that data, plus your intake profile, to engineer a drink-mix formula for your physiology instead of the average athlete's.
Does it hurt? How is sweat collected?
No — it's non-invasive. During a normal training effort, sweat is collected from patches on the skin, then analyzed for sodium concentration. Sweat rate is calculated from body-weight change and fluid intake over the session. TODO: confirm exact in-house methodology.
How is my formula different from a normal sports drink?
Off-the-shelf drinks assume one sweat profile for everyone. Sweat sodium ranges roughly 5–10x across the population. Solute engineers your sodium, maltodextrin, and fructose ratios to your measured losses, then layers on any optional additives your intake supports.
How much carbohydrate and sodium will I get?
It depends entirely on your Sweatprint™ results and session parameters (duration, intensity, climate). That's the point — there's no fixed number we can quote here. Your formula label shows the exact grams of carbohydrate and mg of sodium per serving.
Stop guessing. Start fueling.
Book your Sweatprint™ Test and get a formula engineered for your physiology — not the population average.
Book a Sweatprint™ Test