How Much Sodium Do You Actually Need?
Sweat rates vary enormously: 0.5L/hour in cool conditions to 2.5L/hour in extreme heat. Sweat sodium concentration ranges from 200mg/L (light sweater) to 1,800mg/L (salty sweater). The math: a moderate sweater losing 1L/hour at 900mg/L sodium concentration loses 900mg of sodium per hour.
Signs you are a salty sweater: white residue on dark clothing, stinging eyes, salt crystals on your face after a ride, or muscle cramps despite hydration. If this sounds familiar, you likely need the high-sodium products in this guide.
Quick Comparison
| Product | Sodium | Form | Calories | Price/serve |
|---|---|---|---|---|
| Precision PH 1500 | 1,500mg | Tablet/powder | 6 kcal | $2.50 / €2.30 |
| LMNT | 1,000mg | Powder stick | 0 kcal | $1.75 / €1.60 |
| SaltStick Caps | 215mg/cap | Capsule | 0 kcal | $0.35 / €0.32/cap |
| Nuun Sport | 300mg | Effervescent tab | 15 kcal | $0.70 / €0.65 |
| SiS GO Hydro | 345mg | Effervescent tab | 3 kcal | $0.85 / €0.78 |
| Liquid IV | 500mg | Powder stick | 45 kcal | $1.50 / €1.38 |
Editor's Picks
Best for Heavy Sweaters
Precision PH 1500
1,500mg sodium · Science-backed
Best Value
SaltStick Caps
$0.35 / €0.32/cap · Precise dosing
Best Convenience
Nuun Sport
$0.70 / €0.65/tab · Available everywhere
Individual Reviews
Precision Hydration PH 1500 — Editor's Pick
Precision Hydration is the product of genuine sport science. Their sweat testing protocol (available online or at partner labs) determines your individual sweat sodium concentration and recommends PH 500, PH 1000, or PH 1500 accordingly.
The PH 1500 delivers 1,500mg of sodium per liter with virtually zero calories. Available as effervescent tablets or powder sachets. Used by professional triathletes and increasingly by WorldTour cycling teams.
- Pros: Highest sodium per serve, science-backed personalization via sweat test, zero calories, available in multiple strengths
- Cons: $2.50 / €2.30/serve is premium, salty taste at 1500 strength, no carbs (need separate fuel)
Verdict
The gold standard for sodium replacement. If you cramp despite hydration, or leave white salt marks on your kit, start here. The sweat test adds precision that no other brand offers.
LMNT
1,000mg sodium, 200mg potassium, 60mg magnesium per stick pack. Zero sugar, zero calories. The taste is good (Citrus Salt and Watermelon Salt are community favorites), and the single-serve packets are convenient for jersey pockets.
LMNT is popular through podcast sponsorships and the keto community, which creates some skepticism in endurance circles. But the electrolyte profile is solid for cycling use, especially as a pre-ride or recovery drink.
- Pros: 1,000mg sodium, zero calories, good taste, convenient packets, balanced electrolyte profile
- Cons: $1.75 / €1.60/serve, no carbs, aggressive marketing, not specifically designed for endurance sport
SaltStick Caps
The simplest approach: capsules containing 215mg sodium, 63mg potassium, 22mg calcium, and 11mg magnesium each. Take 1–3 caps per hour based on sweat rate. At $0.35 / €0.32 per capsule, it is the most affordable way to customize your sodium intake precisely.
The capsule format means you can dial in exactly the sodium you need without changing your drink mix. Many ultra-endurance athletes use SaltStick alongside whatever drink they prefer.
- Pros: Cheapest per mg of sodium, precise dosing, no effect on drink taste, widely available, includes potassium/calcium/magnesium
- Cons: Capsules can be hard to swallow mid-ride, some GI sensitivity to capsule casing, easy to forget to take them
Nuun Sport
Drop a tablet in water, wait 2 minutes, drink. 300mg sodium, 150mg potassium, 25mg magnesium, and only 15 calories per tablet at $0.70 / €0.65. The convenience factor is unmatched — tubes fit in a jersey pocket, and they are sold in every bike shop and running store.
For moderate conditions and average sweaters, one Nuun tablet per bottle is sufficient. In heat or for heavy sweaters, use two tablets per bottle or upgrade to a higher-sodium product.
- Pros: $0.70 / €0.65/tab cheapest convenient option, available everywhere, light refreshing taste, clean ingredient list
- Cons: 300mg sodium may be insufficient for heavy sweaters, contains stevia (some dislike the taste), effervescence fades quickly
Liquid IV
500mg sodium with 11g of sugar per packet using Cellular Transport Technology (a marketing term for glucose-facilitated sodium absorption). At $1.50 / €1.38 per packet and 45 calories, it sits between hydration and fuel products.
Popular for general wellness hydration but not widely used in competitive cycling. The sugar content is too low for meaningful fueling and too high for a zero-calorie electrolyte. Most cyclists are better served by a dedicated hydration product plus separate fuel.
- Pros: 500mg sodium, tastes good, widely available in retail stores
- Cons: $1.50 / €1.38/serve, awkward middle ground between hydration and fuel, 11g sugar per serve, not sport-specific
Track how hydration affects your performance
Paincave tracks your training load and provides daily nutrition targets including hydration guidelines based on your actual training data.
Get Started FreeThe Bottom Line
Sodium is the most important electrolyte for cycling performance. Most drink mixes under-deliver. If you sweat heavily, cramp despite hydration, or ride in heat, upgrade to a high-sodium product like Precision PH 1500 or add SaltStick caps to your existing drink.
For moderate conditions and average sweat rates, Nuun Sport is cheap and convenient. The rest of the electrolyte market is largely overpriced salt water with good branding.
Sources
Data from manufacturer specifications, Precision Hydration sport science publications, Baker LB (2017) sweating rate and sweat sodium concentration in athletes, and community reviews from Reddit r/cycling and r/triathlon as of March 2026.