Best Electrolytes for Runners: 17 Brands Ranked by Sodium, Cost, and Portability

The best electrolyte for runners depends on your distance, sweat rate, and budget. A daily jogger doing 3-mile loops doesn't need the same sodium load as a marathoner grinding through 20-mile training runs. And a runner training 5-6 days per week needs to care about cost per serving in a way that casual runners don't.

We compared all 17 brands in our comparison table across sodium content, cost per serving, cost per gram of sodium, and form factor. The short version: Redmond Re-Lyte ($0.75/serving, 810mg sodium, tub format) is the best daily training option for most runners. For race day and long runs, LMNT ($1.50/serving, 1,000mg sodium) and SALTT ($1.17/serving, 969mg sodium) offer high sodium in portable stick packs. For budget runners, Key Nutrients costs just $0.33/serving but only delivers 110mg sodium.

How Much Sodium Do Runners Actually Lose?

The average runner loses about 1 gram of sodium per liter of sweat.^[1] But individual variation is massive. Sweat sodium concentration ranges from 7.0 to 95.5 mmol/L across individuals, with a coefficient of variance of 37-47%. Two runners doing the exact same workout can lose wildly different amounts of sodium.

The ACSM recommends 300-600mg of sodium per hour during exercise.^[2] That's a wide range for a reason. Here's roughly what different running scenarios look like for sodium loss.

Data verified against manufacturer websites. Prices as of March 2026. See the full 17-brand comparison →

One useful self-test: check your clothes after a run. If you see white salt residue on your shirt, hat, or skin, you're a salty sweater and should lean toward the high end of sodium intake. A 2016 randomized controlled trial found that oral salt supplementation produced significantly faster race times in half-ironman triathletes compared to placebo.^[3]

Best Electrolytes for Runners: All 17 Brands Compared

Here's every brand in our comparison, sorted by sodium content. For runners, sodium is the primary electrolyte lost in sweat and the most important one to replace.

Data verified against manufacturer websites. Prices as of March 2026. See the full 17-brand comparison →

A few standouts. Seven brands deliver 800mg+ sodium per serving (LMNT, Hydrate Pro, Zerolyte, SALTT, NormaLyte, Redmond Re-Lyte, and Santa Cruz Paleo). At the bottom, Ultima Replenisher has just 55mg sodium per serving. That's fine for general hydration but nearly irrelevant for replacing run-induced sweat losses.

Best Picks by Runner Type

The Daily Jogger (3-5 miles, 3-4x/week)

If you're running short distances at a moderate pace, you don't need massive sodium doses. You're losing maybe 200-500mg per run. A moderate-sodium option that's affordable for regular use makes the most sense.

Nuun Sport ($0.52/serving, 300mg sodium) is a solid everyday pick. The tablet format is convenient and the price is manageable for daily use. Redmond Re-Lyte ($0.75/serving, 810mg sodium) gives you more sodium headroom if you run in heat. And Key Nutrients ($0.33/serving) is the cheapest option if you just want something in your water, though 110mg sodium is on the low end.

The Half/Full Marathon Trainer (10+ miles, 5-6x/week)

Training at this level means long run days with high sodium loss and easy days where moderate sodium is fine. Most serious runners use two products: a tub at home for daily training and stick packs for long runs and race day.

Redmond Re-Lyte ($0.75/serving, 810mg sodium, tub format) handles daily training at a reasonable cost. Hydrate Pro ($0.78/serving, 1,000mg sodium, tub format) costs nearly the same but delivers more sodium per serving. For long runs, LMNT ($1.50/serving, 1,000mg sodium) or SALTT ($1.17/serving, 969mg sodium) deliver high sodium in portable stick packs. SALTT has the edge for runners who cramp, with 415mg potassium and 178mg magnesium per serving.

The Ultra Runner / Heavy Sweater

Ultra runners and heavy sweaters may need multiple servings per run. Cost per gram of sodium becomes the critical metric at this usage level because you're consuming large volumes.

Hydrate Pro leads at $0.78/g sodium with 1,000mg per serving. Redmond Re-Lyte follows at $0.93/g sodium. SALTT costs more at $1.21/g sodium but has the highest magnesium in the set at 178mg, which some ultra runners value for muscle function during multi-hour efforts.

The Budget Runner

Training 5-6 days per week at $1.50/serving adds up to $33/month. That's $396/year on electrolytes. If cost is a barrier, here's what the numbers look like at 22 servings per month (roughly 5x/week).

Data verified against manufacturer websites. Prices as of March 2026. See the full 17-brand comparison →

The best value with meaningful sodium is Redmond Re-Lyte at $16.50/month with 810mg per serving. Hydrate Pro is a close second at $17.16/month with 1,000mg sodium. Both are tub format, which is always cheaper than stick packs or tablets.

Sugar vs. No Sugar: When Carbs Help Runners

Most electrolyte brands are sugar-free, and for daily hydration that's the right call. But during runs longer than 60-90 minutes, a small amount of sugar can actually help. Glucose aids sodium absorption through the SGLT1 cotransporter in the small intestine, and it provides fuel when glycogen stores deplete.

Four brands in our comparison contain sugar or carbs: NormaLyte (6.75g dextrose), DripDrop (7g sugar), Hydrant (4g sugar), and Nuun Sport (1g sugar). NormaLyte uses dextrose specifically, which is the fastest-absorbing form and what oral rehydration solutions are built on.

The practical split for runners: use a sugar-containing electrolyte during long runs (90+ minutes) when you want both absorption and fuel benefits. Use zero-sugar options for daily hydration, pre-run, and post-run. Most runners don't need sugar in their electrolytes for easy training days.

Form Factor: What Works on Race Day vs. Daily Training

The form factor question is surprisingly practical for runners. You need different things at your kitchen counter versus mile 18 of a marathon.

Tubs (Re-Lyte, Hydrate Pro, Santa Cruz Paleo, Key Nutrients, Ultima): Cheapest per serving. Mix a scoop into your water bottle before heading out. Best for daily training use at home. Not portable for race day or long runs without pre-mixing.

Stick packs (LMNT, SALTT, Zerolyte, NormaLyte, Liquid IV, Thorne Daily, DripDrop, Hydrant, Nectar, Instant Hydration): Pre-measured and portable. Fit in a running belt or vest pocket. Tear, pour into water at an aid station, and go. The preferred format for race day and travel.

Tablets (Nuun Sport): The most portable option. Drop one in any water bottle or cup. Fit in the smallest shorts pocket. Popular at races because they require zero measuring. The trade-off is lower sodium (300mg) compared to stick pack brands.

Capsules (Vitassium): Zero taste, maximum portability. Pop two capsules with water and you're done. Good for runners who hate flavored drinks. But no flavor benefit means you still need to convince yourself to drink enough water alongside them.

Why Plain Water Can Be Dangerous on Long Runs

Exercise-associated hyponatremia (EAH) is a real risk for distance runners. It happens when you drink too much plain water and your blood sodium concentration drops to dangerous levels. A 2022 review found that roughly 8% of marathon runners develop EAH,^[4] and at least 12 deaths have been attributed to hyponatremic encephalopathy in endurance events.

The symptoms (nausea, headache, confusion, muscle weakness) look almost identical to dehydration. That's the danger: many runners experiencing hyponatremia think they need more water, so they drink even more, making the problem worse. Risk factors include slower finishing times, female sex, NSAID use before a race, and drinking "as much as possible" rather than to thirst.

The fix is straightforward. Replace sodium alongside water during any run lasting more than 60 minutes. Research consistently shows that sodium supplementation during endurance activity improves performance and prevents serum sodium decline.^[5] This isn't meant to scare anyone away from running. Most runners will never experience EAH. But awareness and simple prevention (adding electrolytes to your water) makes it a non-issue.

The Bottom Line

Best overall for marathon training: Redmond Re-Lyte for daily training ($0.75/serving, 810mg sodium, 400mg potassium, tub format) plus LMNT or SALTT stick packs for long runs and race day.

Best budget pick: Key Nutrients at $0.33/serving ($7.26/month) for daily hydration. The 110mg sodium is low, so pair it with salt in food or use a higher-sodium brand on long run days.

Best for heavy sweaters: SALTT (969mg sodium, 415mg potassium, 178mg magnesium at $1.17/serving) or Hydrate Pro (1,000mg sodium at $0.78/serving, best $/g sodium value).

Best for race day portability: Nuun Sport tablets ($0.52, fit anywhere) for moderate sodium needs. LMNT stick packs ($1.50, 1,000mg sodium) for high-sodium needs.

The universal rule from the running community applies here too: test during training, never on race day. Try a new electrolyte on an easy run first. GI tolerance varies by person, and finding out a product upsets your stomach at mile 20 is not a mistake you want to make.

See our full 17-brand comparison table to sort by the metric that matters most to you.

References

1. Baker LB. "Sweating Rate and Sweat Sodium Concentration in Athletes: A Review of Methodology and Intra/Interindividual Variability." Sports Medicine, 2017; 47(Suppl 1):111-128. pubmed.ncbi.nlm.nih.gov
2. Sawka MN, Burke LM, Eichner ER, Maughan RJ, Montain SJ, Stachenfeld NS. "American College of Sports Medicine position stand. Exercise and fluid replacement." Medicine & Science in Sports & Exercise, 2007; 39(2):377-390. pubmed.ncbi.nlm.nih.gov
3. Del Coso J, Gonzalez-Millan C, Salinero JJ, Abian-Vicen J, Areces F, Lledo M, Lara B, Gallo-Salazar C, Ruiz-Vicente D. "Effects of oral salt supplementation on physical performance during a half-ironman." Scandinavian Journal of Medicine & Science in Sports, 2016; 26(2):156-164. pubmed.ncbi.nlm.nih.gov
4. Krabak BJ, Parker KM, DiGirolamo A. "Exercise-Associated Hyponatremia in Marathon Runners." International Journal of Environmental Research and Public Health, 2022; 19(22):15371. pmc.ncbi.nlm.nih.gov
5. Vitale K, Getzin A. "Effects of Sodium Intake on Health and Performance in Endurance and Ultra-Endurance Sports." International Journal of Environmental Research and Public Health, 2022; 19(6):3651. pmc.ncbi.nlm.nih.gov