During-effort fuel · electrolyte · reviewed 3 Sep 2026
Tailwind Rapid Hydration 25
Tailwind's light-hydration line, priced at $3.75 per 1000mg of sodium -- pricier than GU Hydration Tabs' $2.09 or LMNT's $1.50, but the only electrolyte product in this catalog sweetened with real cane sugar and carrying 12mg of vitamin C.
Score breakdown
Each dimension below is scored 0 to 100 against a fixed scale, not against the rest of the catalog, so adding a product never moves this number. The overall score is the average of the dimensions this product declares data for. How the scales are set →
Comparison
6 of 14 electrolytes heldPrices per single sachet at the cheapest box size we track. Best in green, worst in red, across the gels shown.
| Measure | Tailwind Nutrition Tailwind Rapid Hydration | LMNT LMNT Citrus Salt | Nuun Nuun Sport | Precision Fuel & Hydration Precision Fuel & Hydration PH 1000 | Science in Sport SiS GO Hydro | 4Endurance 4Endurance Electrolytes |
|---|---|---|---|---|---|---|
| Overall scoreAn average of the various variables measured. | 25 | 75 | 37 | 36 | 44 | 50 |
| SodiumThe main electrolyte lost in sweat, and the biggest single driver of cramping and hyponatremia risk. | 320 mg | 1000 mg | 300 mg | 500 mg | 345 mg | 250 mg |
| PotassiumWorks alongside sodium in muscle and nerve function. | 90 mg | 200 mg | 150 mg | 130 mg | 65 mg | 70 mg |
| CalciumInvolved in muscle contraction; lost in far smaller amounts than sodium. | 30 mg | 0 mg | 13 mg | 20 mg | 102 mg | 10 mg |
| MagnesiumSupports muscle and nerve function; some evidence it blunts cramping. | 10 mg | 60 mg | 25 mg | 10 mg | 8.1 mg | 50 mg |
| CarbohydrateMinimal by design. This is a hydration product, not a fuel source. | 12 g | 0 g | 4 g | 3 g | 0.9 g | 0 g |
| Price per sachetWhat one sachet costs. | $1.20 | $1.50 | $0.75 | $1.20 | $0.75 | $0.27 |
| Cost per 1000mg sodiumThe only price that compares across different sodium concentrations. | $3.75 | $1.50 | $2.50 | $2.40 | $2.17 | $1.08 |
Verdict
what it does · what it costsWhat it does well
- 320mg sodium and 90mg potassium a sachet, dosed for shorter or lighter sessions rather than Endurance Fuel's longer-effort 310mg-per-serving target.
- 12mg of vitamin C -- not found in any other electrolyte product in this catalog.
- Sweetened with cane sugar rather than a non-nutritive sweetener: 10g of its 12g carbohydrate is sugars, a genuinely different formulation than the zero-carb LMNT or High5 Zero tablets.
- 45 kcal a sachet, enough to matter for short recovery use without approaching drink-mix calorie territory.
What it costs you
- $3.75 per 1000mg of sodium is pricier than GU Hydration Tabs, Nuun Sport, Precision Fuel & Hydration PH 500, and LMNT.
- 12g of carbohydrate a sachet (10g sugars) means this isn't a zero-calorie option the way LMNT or High5 Zero are.
- 320mg of sodium a sachet is low for hot-weather, long-session use -- three sachets are needed to approach LMNT's single-stick 1000mg dose.
- Calcium and magnesium are present (30mg/10mg) but secondary to the sodium/potassium/vitamin-C positioning.
Where to buy
Prices and links as last checked. The price next to the name above is per unit at the cheapest box size we track -- a single-unit price below may run higher.
Who this is for
the numbers, appliedThe field tells you what it is. This is who should act on it.
Worth the money if
- You want light hydration for short or easy sessions and don't mind some sugar and calories.
- You're already on Tailwind Endurance Fuel or High Carb Fuel and want a matching lower-dose option for easy days.
Look elsewhere if
- You want the lowest cost per 1000mg of sodium -- GU Hydration Tabs, Nuun Sport, and LMNT all beat it on price.
- You want a zero-carb, zero-calorie electrolyte tablet.