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Electrolytes (sodium & potassium) supplements, compared

9 products we’ve reviewed list electrolytes (sodium & potassium) as a key ingredient. Here’s what it does, what the research uses — and how much each product actually contains.

What it is

Sodium and potassium are the main electrolytes lost in sweat; they help the body hold on to fluid and keep muscles and nerves working.

What the research uses

The Daily Value for sodium is less than 2,300 mg a day. Endurance athletes and heavy sweaters lose more sodium in sweat and may need to replace some of it during long sessions in the heat.

People with high blood pressure, heart or kidney disease should check with a doctor before using high-sodium mixes.

Educational information, not medical advice. Talk to a healthcare professional before starting a supplement, especially if you are pregnant, nursing or take medication.

Every product, dose by dose

ProductElectrolytes (sodium & potassium) per servingFormScore
Sport Electrolyte Tablets
NuunSport Electrolyte Tablets
Informed ChoiceCertified Gluten-FreeKosherCertified VeganNon-GMO Project Verified
300 mgSodium150 mgPotassiumTablet7.9
Classic Electrolyte Powder Packets
PedialyteClassic Electrolyte Powder Packets
Kosher
260 mgSodium (salt, sodium citrate)180 mgPotassium (potassium citrate)Stick pack7.5
Hydrating Electrolyte Mix
CureHydrating Electrolyte Mix
Third-party testedKosher
240 mgSodium (pink Himalayan salt, sodium citrate)310 mgPotassium (from coconut water powder)Stick pack7.5
Original Electrolyte Powder (ORS)
DripDropOriginal Electrolyte Powder (ORS)
Kosher
330 mgSodium (sodium citrate, salt)180 mgPotassiumStick pack7.5
Pre-Workout
Alani NuPre-Workout		150 mgSodiumPowder7.5
Zero-Sugar Electrolyte Drink Mix
LMNTZero-Sugar Electrolyte Drink Mix
Third-party testedcGMP facility
1,000 mgSodium (salt)200 mgPotassium (potassium chloride)Stick pack7.3
Replenisher Daily Electrolyte Drink Mix
UltimaReplenisher Daily Electrolyte Drink Mix
Non-GMO Project Verified
55 mgSodium250 mgPotassiumPowder7.2
Hydration Multiplier
Liquid I.V.Hydration Multiplier		560 mgSodium370 mgPotassiumStick pack7.0
Original BCAA Powder
XtendOriginal BCAA Powder
NSF Contents Certified
220 mg / 170 mgSodium and potassiumPowder6.7

Amounts are per serving as printed on each label. “Not disclosed” usually means the ingredient sits inside a proprietary blend.

Questions people ask

How much electrolytes (sodium & potassium) do studies use?
The Daily Value for sodium is less than 2,300 mg a day. Endurance athletes and heavy sweaters lose more sodium in sweat and may need to replace some of it during long sessions in the heat.
Which electrolytes (sodium & potassium) supplement scores highest?
In our reviews, Nuun Sport Electrolyte Tablets scores highest at 7.9/10, followed by Pedialyte Classic Electrolyte Powder Packets (7.5) and Cure Hydrating Electrolyte Mix (7.5). Scores weigh efficacy, quality, value, experience and transparency — not just the dose.
How much electrolytes (sodium & potassium) is in these products?
It varies by product and serving size — for example Nuun Sport Electrolyte Tablets (300 mg), Pedialyte Classic Electrolyte Powder Packets (260 mg), Cure Hydrating Electrolyte Mix (240 mg). The table above lists the amount per serving for every product we've reviewed.

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