CROSS YOUR THRESHOLD
The only endurance fuel system that adapts to every workout. Not a formula. A system.
CARBS. ELECTROLYTES. CAFFEINE. — Built for Ironman. Dialed for every mile before it.
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One System. Infinite Fueling Strategies.
CARBS
High-carb endurance fuel using a science-backed 1:0.8 maltodextrin to fructose ratio — the same ratio validated for peak carbohydrate oxidation above 90g per hour. No GI lock-in. No bottle size restrictions. 30g to 120g per bottle, you decide.
Up to 120g carbs per bottle
ELECTROLYTES
A complete mineral matrix dosed for long-course racing — not a gym session. 800mg sodium citrate, 200mg potassium citrate, 100mg magnesium glycinate, 30mg calcium citrate. Every mineral. Every form chosen for absorption, not cost.
800mg sodium per serving — Ironman grade
CAFFEINE + FOCUS
Precision caffeine at 30mg per scoop — dose exactly what you need, bottle by bottle. Paired with L-Theanine at a 2:1 ratio for smooth, sustained focus with zero jitters. No spike. No crash. No surprise at mile 18.
30mg caffeine + 60mg L-Theanine per scoop
Build Your Bottle. Every Workout Is Different.
Stop forcing a fixed formula onto a variable effort.
Long Endurance Ride
Carbs + Electrolytes — 90g carbs, 1 electrolyte stick. 4-6 hour fuel.
Race Day (Ironman/70.3)
Carbs + Electrolytes + Caffeine — 120g carbs, full electrolyte dose, caffeine loaded for last 2 hours.
Morning Run (under 90 min)
Electrolytes + Caffeine — no carbs needed. Sodium, magnesium, and a clean 30mg caffeine hit.
Why Every Ingredient Was Chosen
We didn't just create another sports drink. We rebuilt the system from scratch.
THRESH
No bottle size restriction. Dose 30g to 120g in any size bottle. 1:0.8 maltodextrin:fructose ratio — same science, zero restrictions.
Maurten
Requires exactly 500ml. Hydrogel tech that independent research shows no clear GI benefit over standard carb blends.
THRESH
Complete matrix. Sodium citrate + potassium + magnesium glycinate + calcium. High-dose Ironman-grade sodium. Superior mineral forms for real absorption.
LMNT
Sodium-heavy. No calcium. Low magnesium. Good for gym sessions — under-dosed for 6-hour efforts.
THRESH
30mg precision scoops. Paired with L-Theanine 2:1 for smooth focus. No jitters. Completely separate from carbs so you control both independently.
everything else
Caffeine bundled with carbs. You can't adjust one without adjusting the other.
Every ingredient. Every dose. Every decision backed by research.
JOIN THE LISTYour Fuel Should Adapt To Your Training
Maurten locks you into 500ml. Gatorade under-doses electrolytes for serious efforts. Most caffeine products bundle it with carbs so you can't control either. Every product forces a formula built for the average athlete — not for your distance, your sweat rate, or your race.
A 3-hour training ride needs different fuel than a 10-hour Ironman. A hot race needs more sodium than a cool morning run. Your carb tolerance on week 12 of training is not the same as week 1. Your fuel should be as dialed as your training plan.
The THRESH Way
Built For Endurance Athletes
THRESH was built by a triathlete training for Ironman who couldn't find a fueling system that actually worked at volume. Too many gels. Too much foam. Too many restrictions on how much you could carry or mix.
So we built the system we wanted. Unflavored carbs you can dose from 30g to 120g in any bottle. A complete electrolyte matrix with the forms that actually absorb — not the cheap versions. And precision caffeine you can time exactly, without it being bundled into your carbs.
Every formula choice has a peer-reviewed study behind it. Every dose is matched to what endurance athletes actually lose and need at race pace. This is not a supplement company's idea of what an athlete needs. This is an athlete's solution.
Early Access
Be First. Founding Member Pricing.
THRESH is in development. Early access members get founding pricing, first access to product samples, and direct input into what gets built. Drop your email.
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