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Sports Performance
Fuel. Sweat. Train. Recover.
Built for athletes who put in the work.
— Formula Stats —
Choose Your Size
— Choose Your Size —
— The Formula —
Products coming soon.
— What's Inside —
Iodized Himalayan Salt
Replaces what you lose mile after mile. Sodium drives fluid absorption, powers nerve signals, and keeps muscles firing. Himalayan salt adds 84+ trace minerals standard table salt doesn't carry.
+ Trace Minerals Beyond Standard NaCl
Potassium Chloride
Works in tandem with sodium to keep fluids balanced across every cell. Critical for muscle contractions — low potassium leads to cramping, weakness, and a slower finish on the back half of any race.
+ Science-Backed Na:K Ratio For Athletes
Magnesium Glycinate
The most bioavailable form of magnesium. Supports muscle recovery, reduces post-workout soreness, aids sleep quality, and powers the ATP energy production that fuels every stride.
+ Highest Absorption Rate Of Any Magnesium Form
Citric Acid
A naturally occurring acid found in citrus fruits. It enhances mineral absorption — helping your body actually use the electrolytes in every scoop — while delivering a clean, crisp tartness that makes FSTR easy to drink during hard efforts. No artificial sour agents, ever.
+ Boosts Electrolyte Bioavailability
Real Fruit Powder
Every FSTR flavor is built with real fruit powders — not artificial flavoring agents or chemical extracts. Real fruit provides naturally occurring phytonutrients and antioxidants alongside the flavor, supporting recovery and reducing oxidative stress that builds up during intense training.
+ No Artificial Flavors Or Dyes
Stevia Leaf Extract
A plant-derived sweetener with zero sugar, zero calories, and zero glycemic impact. Stevia keeps FSTR tasting clean without spiking insulin or disrupting fat metabolism mid-workout — making it the right choice for athletes who train fasted or are managing body composition.
+ Zero Sugar · Zero Calories · Zero Glycemic Impact
— Race Results —
How we stack up against the major brands
| BRAND | 30 SERVINGS | PER SERVING | SODIUM | POTASSIUM | MAGNESIUM |
|---|---|---|---|---|---|
| FSTR | $15.00 | $0.50 | 1000mg ELITE | 200mg | 60mg GLYCINATE |
| LMNT | $45.00 | $1.50 | 1000mg | 200mg | 60mg MALATE |
| Liquid IV | ~$40.00 | ~$1.33 | 500mg | 370mg | None |
| Nuun Sport | ~$21.00 | ~$0.70 | 300mg | 150mg | 25mg OXIDE |
*Competitor prices based on standard retail/Amazon pricing as of 2025. Magnesium bioavailability ranking: Glycinate (highest) > Malate > Oxide (lowest).