Sodium chlorideSodium salt
Provides sodium for extracellular fluid balance. Works with potassium to help nerves signal and muscles contract.
Take back what you lose in the heat.
Electrolytes for training, recovery, and everything that comes after. Dosed to the milligram. Made in Indonesia. Built for the heat.
Waitlist · 10% off at launch
Three minerals. Nothing beyond what's useful.
NaSodium
0mg
The primary electrolyte lost in sweat. Helps maintain fluid balance.
KPotassium
0mg
Works alongside sodium to maintain fluid balance.
MgMagnesium
0mg
Plays an important role in energy metabolism. Supports neuromuscular function.
[Without]
0g added sugar
No artificial colors, flavors, or sweeteners.
Humid heat changes the equation.
Sun's up. Shirt stuck to your back. Motorbikes passing by. Wet asphalt under your feet. No crowd. No cheering. Just the heat.
The pace settles. The sweat doesn't. It builds up. Every drop takes something with it. The longer you stay out there, the more there is to replace.
Measured loss per hour
Sodium0to0mg
04008001,2001,600 mg
Potassium0to0mg
0100200300400 mg
Measured in runners at approx. 30°C and 70% relative humidity. Surapongchai et al., Nutrients (2021).
Hydration doesn't need a longer list of ingredients. It needs the right ones, in the right amounts, made into something you'll actually want to drink. Nothing unnecessary.
The heat takes. WITHIN replenishes. You carry on.
Compare what's WITHIN.
Formulated with precision, for those who train in the humid heat. Every ingredient earns its place.
Isotonic drinks
Fluid for rehydration
Prepared serving500 mlSodium
1000 mg110–245 mg
Potassium
250 mg70–100 mg
Magnesium
50 mg0–3 mg
Added sugar
None
22–32 g
Artificial colors
None
None
Artificial flavors
None
Synthetic
Artificial sweeteners
None
Some brands
* All values normalized to a 500 ml serving.
Less than 8 ingredients. Each with a purpose.
Nothing added without reason. Nothing hidden in fine print.
Potassium chloridePotassium salt
Provides potassium for intracellular fluid balance. Works with sodium to help nerves signal and muscles contract.
Magnesium carbonateMagnesium salt
Provides magnesium for a range of biochemical reactions. Plays an important role in energy production and neuromuscular function.
Natural flavoringNatural flavors
Flavor from natural sources. No artificial flavors or colors.
Natural sweetenerStevia
Provides sweetness without added sugar.
Questions,
answered plainly.
Three minerals: sodium, potassium and magnesium. Stevia for sweetness. Natural flavoring to help the whole thing go down. Under 8 ingredients in total, each there for a reason. No added sugar. No unnecessary extras.
Meet us at the starting line.
Get on the list. A single email when we're ready. That's it.
Once we're set to go, 10% off at launch.