Best Electrolyte Powder (2026): Sodium per Dollar, Ranked
Not medical advice. This summarizes sweat-loss data and hydration trials, the labels manufacturers file with the NIH, and current Amazon prices. Ask a clinician before adding sodium or potassium with high blood pressure, heart failure or kidney disease.
Quick answer
An electrolyte powder has one job, replacing the sodium you sweat, and most of the shelf is not built for it. Sweat carries about 825 mg of sodium per litre (range 418 to 1,628) and a hard hour produces 1.21 litres, so an hour of real exercise loses roughly 1,000 mg. The median electrolyte powder filed with the NIH delivers 180 mg a serving, and 75.8% deliver under 300.
Buy by sodium per dollar, and buy the dose you sweat. LMNT Recharge Electrolytes puts 1,000 mg in one stick at $1.50 per 1,000 mg; Transparent Labs Hydrate carries 500 mg a scoop at the same $1.50 with a third-party certificate. The cheapest powder per serving on the shelf costs 6.5× as much per milligram of sodium. See the census →
Tablets and chews too? See the ranked electrolyte drinks →
On this page
How much sodium a powder should carry: the sweat arithmetic
Sweat is mostly water and sodium chloride, and both the rate and the concentration vary widely between people. The largest normative dataset, 506 athletes across team and endurance sports in conditions from cool to hot, put predicted whole-body sweat sodium at a mean of 35.9 mmol per litre with a range of 18.2 to 70.8, and whole-body sweating rate at a mean of 1.21 litres an hour (Baker 2016, PMID 26070030). In milligrams that is 825 mg of sodium per litre, 418 for a light sweater and 1,628 for a salty one, and about 1,000 mg lost in an average hard hour. Sweat-testing methods vary enough that any individual figure carries error (Baker 2017, PMID 28332116), which is why the practical target is a range, 500 to 1,000 mg of sodium per hour of heavy sweating, rather than a number.
Potassium is the other electrolyte on every label and the one the body loses least: sweat potassium runs a small fraction of sodium, and the diet supplies grams of it a day. A powder that carries more potassium than sodium is formulated for taste and marketing, not for sweat. Magnesium losses in sweat are smaller still. The sports-medicine position statement of the Academy of Nutrition and Dietetics, Dietitians of Canada and the American College of Sports Medicine recommends carbohydrate-electrolyte drinks for prolonged or intense exercise, heavy sweating and heat, and plain water for everything shorter (Thomas 2016, PMID 26891166). For illness, the reference is the WHO reduced-osmolarity oral rehydration solution, sodium paired with glucose, which cut the need for intravenous fluids against the older formula (Hahn 2002, PMID 11869639); the glucose-paired powders on this page are built on that principle.
We read 184 electrolyte powder labels: the shelf is a pinch of salt
Original researchEvery electrolyte or hydration powder label we could enumerate in the NIH Dietary Supplement Label Database on 2026-09-18: 245 powder labels with a sodium or potassium row retrieved, of which 184 are sold as electrolyte or hydration products (61 protein, pre-workout, greens and amino powders that happen to list sodium are excluded), from 62 brands; 816 electrolyte labels of any form are on the market. Sodium is declared on 98.9% of them.
The median serving delivers 180 mg of sodium; a quarter of labels deliver 101 mg or less and three quarters 270 mg or less. 75.8% of labels sit under 300 mg, 6.6% reach 500 mg, and not one reaches the 1,000 mg an hour of hard sweat removes. The most sodium on any label we read was 939 mg. The two highest-sodium sticks in our catalog, LMNT Recharge Electrolytes and Redmond Re-Lyte Hydration, do not appear in the database at all: the brands built for sweat replacement have not filed a label with the NIH, and the shelf that has is the daily-wellness shelf.
| Item | Value ( mg) |
|---|---|
| Powder labels, lower quarter | 101 mg |
| Powder labels, median | 180 mg |
| Powder labels, upper quarter | 270 mg |
| One hour of hard sweat | ~1,000 mg |
| LMNT Recharge Electrolytes, one stick | 1,000 mg |
The shelf is inverted. Potassium is declared on 97.3% of labels at a median 250 mg, above the median sodium, and 55.4% of labels carry more potassium than sodium, the reverse of sweat. Magnesium is on 91.3% at a median 100 mg. Sugar-wise, 41.8% of labels claim sugar-free or declare zero; among the 55.4% that declare a sugars row the median serving carries 2 g, so the glucose-paired oral-rehydration style is a minority of the shelf.
How we read the labels, and what did not hold
Method: 245 labels retrieved from the NIH Dietary Supplement Label Database on 2026-09-18 by paging its ranked search for electrolyte and hydration powder terms and keeping only labels whose filed physical state is Powder, whose panel carries a sodium or potassium row, and whose product name says electrolyte or hydration; 184 were analysed. Sodium, potassium and magnesium are the Supplement Facts rows for the panel’s serving (one packet, scoop or stick), never a compound weight. Every figure was recomputed in two halves of the corpus split by label-id parity: 17 of 19 checks agreed within tolerance and only those are printed. Not printed (2): share at least 10 g sugars per serving; median calories per serving. The highest single serving is an observed extreme, not a validated statistic. The census and the cost table are published as open data at /electrolytes/powder.json (CC BY 4.0). What it cannot tell you: how many tubs each brand sells, whether the powder matches its label, or anything about brands that have not filed with the NIH, which includes the two highest-sodium sticks we track.
Every electrolyte powder we track, ranked by cost per 1,000 mg of sodium
Sodium, potassium, magnesium and sugar are each product’s own Supplement Facts figures; prices are the current Amazon price for the exact pack. Cost per 1,000 mg of sodium is price divided by total sodium in the pack, times 1,000: the price of replacing one hour of hard sweat. Cheapest first. Tablets and chewables are on the drinks ranking.
| Powder | Per 1,000 mg Na | Sodium / serving | Servings for one hour | Potassium | Magnesium | Sugar | Servings | Price | Certification | Buy |
|---|---|---|---|---|---|---|---|---|---|---|
| LMNT Recharge Electrolytes (stick pack) | $1.50 | 1,000 mg | 1.0 | 200 mg | 60 mg | 0 g | 30 | $44.97 | none | Check price |
| Transparent Labs Hydrate (tub + scoop) | $1.50 | 500 mg | 2.0 | 250 mg | 50 mg | 0 g | 40 | $29.99 | Informed Choice | Check price |
| Redmond Re-Lyte Hydration (stick pack) | $1.89 | 810 mg | 1.2 | 400 mg | 50 mg | 0 g | 30 | $45.94 | none | Check price |
| Liquid I.V. Sugar-Free Hydration Multiplier (stick pack) | $2.74 | 530 mg | 1.9 | not listed | 0 mg | 0 g | 14 | $20.36 | none | Check price |
| DripDrop ORS Hydration (stick pack) | $2.81 | 330 mg | 3.0 | 185 mg | 39 mg | 7 g | 32 | $29.69 | none | Check price |
| BUBS Naturals Hydrate or Die Electrolytes (stick pack) | $2.85 | 650 mg | 1.5 | 200 mg | 50 mg | 7 g | 20 | $37.00 | NSF Certified for Sport | Check price |
| Liquid I.V. Hydration Multiplier (stick pack) | $3.00 | 500 mg | 2.0 | 370 mg | 0 mg | 11 g | 16 | $24.00 | none | Check price |
| Ultima Replenisher Electrolyte Powder (tub + scoop) | $9.69 | 55 mg | 18.2 | 250 mg | 100 mg | 0 g | 90 | $47.99 | none | Check price |
Per 1,000 mg of sodium the spread is $1.50 to $9.69, 6.5× from best to worst. Ultima Replenisher Electrolyte Powder, the cheapest per serving, is the most expensive per milligram of sodium because a scoop carries 55 mg: it is the census median shelf in one tub. 7 of the 8 powders we track carry more sodium than the median NIH label; that is not because we chose well but because the sweat-replacement brands, the ones a buyer searching “electrolyte powder” usually means, live outside the database.
Which electrolyte powder to buy
Product links go to Amazon and we may earn a commission if you buy. It never changes which product we pick or what we say about it. How we choose.
Who needs an electrolyte powder, and who is buying salt water
Buy one if you sweat hard for an hour or more, train or work in heat, are on a ketogenic or fasting diet (lower insulin makes the kidneys shed sodium, as the dosage guide lays out), or are recovering from vomiting or diarrhoea, where the glucose-paired formula is the one to reach for. Dose it to the hour: 500 to 1,000 mg of sodium per hour of heavy sweating, and water to thirst.
Do not buy one to drink at a desk. The median powder on the NIH shelf delivers 180 mg of sodium, a pinch of salt at a premium price, and the high-sodium sticks add a real dose of sodium to a diet that public-health trials say is already high: a Cochrane meta-analysis found modest salt reduction lowers blood pressure (He 2013, PMID 23558162), while a large cohort found the lowest cardiovascular risk in the middle of the intake range rather than at the bottom (O’Donnell 2014, PMID 25119607). Either way, a sedentary day needs no stick. And do not buy a powder for its potassium: the diet supplies grams, sweat loses little, and a label with more potassium than sodium is telling you it was not formulated for sweat.
Safety, briefly
The acute danger in endurance sport is the opposite of what the shelf sells: exercise-associated hyponatraemia from overdrinking plain water. In a Boston Marathon study, 13% of finishers had low blood sodium and drinking more than three litres during the race was the strongest risk factor (Almond 2005, PMID 15829535); the consensus statement on the condition puts drinking to thirst first and sodium second (Hew-Butler 2015, PMID 26102445). The chronic risk runs the other way: a high-sodium stick every day on a normal diet is a blood-pressure decision, and people with hypertension, heart failure or kidney disease should ask before adding one. Potassium in the hundreds of milligrams is safe for healthy kidneys and not for anyone on potassium-sparing diuretics or ACE inhibitors without advice. Sugar-free sticks use stevia or allulose; the glucose-paired ones carry a real sugar dose, which is the point of them and a reason not to drink them daily.
Frequently asked questions
What is the best electrolyte powder?
For replacing what you sweat, LMNT Recharge Electrolytes: 1,000 mg of sodium per stick, about one hour of hard exercise, at $1.50 per 1,000 mg of sodium. For a tested product at the same price per milligram, Transparent Labs Hydrate carries 500 mg per scoop with an Informed Choice certificate. For a desk day, most people need no electrolyte powder at all; the median label on the shelf delivers 180 mg of sodium, which is a pinch of salt.
How much sodium should an electrolyte powder have?
Match it to sweat. In 506 athletes, whole-body sweat carried a mean 825 mg of sodium per litre (range 418 to 1,628) at a mean sweating rate of 1.21 litres an hour, so an hour of hard work loses roughly 1,000 mg. A powder meant to replace that needs 500 to 1,000 mg a serving. 6.6% of the 184 powder labels we read reach 500 mg; none reach 1,000.
Do I need electrolytes every day?
Not unless you are sweating hard, ill, or on a very low-carbohydrate diet. The sports-medicine position statement recommends carbohydrate-electrolyte drinks for prolonged or intense exercise, heavy sweating and heat, not for ordinary days, and public-health trials show modest salt reduction lowers blood pressure. A daily electrolyte habit on a normal diet adds sodium you do not need; the exception is a keto or fasting diet, where lower insulin makes the kidneys shed sodium.
Is Liquid I.V. or LMNT better?
They are built for different jobs. Liquid I.V. Hydration Multiplier is an oral-rehydration-style formula: 500 mg of sodium paired with glucose, which speeds water absorption and suits illness or a long hot day when you are also eating little. LMNT Recharge Electrolytes is a zero-sugar high-sodium stick, 1,000 mg, for sweat replacement and low-carbohydrate diets. Per 1,000 mg of sodium, LMNT Recharge Electrolytes costs $1.50 and Liquid I.V. Hydration Multiplier $3.00. The full head-to-head is in the LMNT vs Liquid I.V. guide.
Can you take too much electrolyte powder?
Yes, in two directions. Too much sodium on top of a normal diet pushes blood pressure up over time and matters most for people with hypertension or kidney disease; a high-sodium stick is a dose, not a flavouring. Too much plain water without sodium is the acute danger in endurance events: in one Boston Marathon study 13% of finishers had low blood sodium, and drinking more than three litres during the race was the top risk factor. Potassium is the other limit; a powder with several hundred milligrams is fine for healthy kidneys and not for someone on potassium-sparing drugs.
Why do most electrolyte powders have so little sodium?
Because sodium tastes salty and sells badly, and because many powders are formulated as a daily wellness drink rather than sweat replacement. On the labels we read, 55.4% carry more potassium than sodium, the inverse of sweat, and 75.8% deliver under 300 mg of sodium. Read the Sodium row on the Supplement Facts panel before the front of the tub.
Related guides
- Electrolytes: what to buy and when
- Best electrolyte drinks, ranked by sodium and testing
- Electrolyte dosage guide
- Electrolyte formulas compared
- LMNT vs Liquid I.V.
- Gatorade alternatives
Sources
- Baker LB, et al. “Normative data for regional sweat sodium concentration and whole-body sweating rate in athletes.” J Sports Sci. 2016. PMID: 26070030
- Baker LB. “Sweating Rate and Sweat Sodium Concentration in Athletes: A Review of Methodology and Intra/Interindividual Variability.” Sports Med. 2017. PMID: 28332116
- Thomas DT, Erdman KA, Burke LM. “Position of the Academy of Nutrition and Dietetics, Dietitians of Canada, and the American College of Sports Medicine: Nutrition and Athletic Performance.” J Acad Nutr Diet. 2016. PMID: 26891166
- Hahn S, et al. “Reduced osmolarity oral rehydration solution for treating dehydration caused by acute diarrhoea in children.” Cochrane Database Syst Rev. 2002. PMID: 11869639
- He FJ, Li J, Macgregor GA. “Effect of longer term modest salt reduction on blood pressure: Cochrane systematic review and meta-analysis of randomised trials.” BMJ. 2013. PMID: 23558162
- O’Donnell M, et al. “Urinary sodium and potassium excretion, mortality, and cardiovascular events.” N Engl J Med. 2014. PMID: 25119607
- Almond CS, et al. “Hyponatremia among runners in the Boston Marathon.” N Engl J Med. 2005. PMID: 15829535
- Hew-Butler T, et al. “Statement of the Third International Exercise-Associated Hyponatremia Consensus Development Conference.” Clin J Sport Med. 2015. PMID: 26102445
- NIH Office of Dietary Supplements. Dietary Supplement Label Database. dsld.od.nih.gov (labels retrieved 2026-09-18).