Best Electrolyte Drinks in the UK (2026): Ranked by Sodium & Testing
Informational summary — not medical advice. If you have high blood pressure, kidney disease, or heart failure, or take diuretics or BP medication, talk to your doctor before adding a high-sodium product.
Prices and cost per day here are from our US catalogue in USD. UK prices differ, use them to compare products with each other, not to budget in pounds. Buy buttons open the product on Amazon.co.uk; where a brand is not sold in the UK, the button opens an Amazon.co.uk search instead of a dead page.
The best electrolyte drink depends on the job — because sodium ranges 18x across these products (55 to 1,000 mg) and they all look identical on the shelf. We rank by verified sodium per serving, cost per serving (price when checked), and certifications — where the finding is stark: of 12 products, only 5 state a product-level certification, and only one of those matched a registry. Not sure you even need one? Start with how much you actually need.
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| Item | Value (mg) |
|---|---|
| LMNT | 1000 mg |
| Redmond | 810 mg |
| BUBS Naturals | 650 mg |
| Liquid I.V. | 530 mg |
| Liquid I.V. | 500 mg |
| Transparent Labs | 500 mg |
| Gatorade | 490 mg |
| DripDrop | 330 mg |
| Nuun | 300 mg |
| Pedialyte | 260 mg |
| SaltStick | 100 mg |
| Ultima | 55 mg |
The awards
500 mg sodium, 0 g sugar, and listed in NSF Certified for Sport (US product) — at the cheapest per serving of the high-sodium formulas. The balanced default.
The most sodium per stick (1,000 mg) with zero sugar and 60 mg magnesium. Premium-priced, no certification stated, but nothing mainstream delivers more sodium without carbs.
Listed in NSF Certified for Sport as Mixed Berry sticks (US product). 650 mg sodium; it also costs the most per serving.
Low cost per serving, zero sugar, and mineral-forward (250 mg potassium, 100 mg magnesium) — though low sodium (55 mg), so it is a daily top-up, not a heavy-sweat drink.
A glucose-paired ORS-style formula. The sugar is there on purpose, because glucose helps sodium and water absorption.
Comparing the two big names? See LMNT vs Liquid I.V. Want the cheapest option? A DIY mix runs ~$0.05/serving.
The certification story (the thing nobody shows you)
Walk the electrolyte aisle and every product promises "clean" hydration. 5 of the 12 electrolyte drinks we compare are listed in a lab-testing registry for the product we price: BUBS Naturals Hydrate or Die and Transparent Labs Hydrate in NSF Certified for Sport, and Redmond Re-Lyte, Nuun Sport and SaltStick FastChews in Informed Choice (product lines). NSF lists other flavors or stick sizes of Liquid I.V. Sugar-Free Hydration Multiplier and DripDrop ORS, not the ones we price. We found no listing for LMNT Recharge, Liquid I.V. Hydration Multiplier, Gatorade Gatorlyte, Pedialyte Powder Packs and Ultima Replenisher. Registries read Aug 25 to Oct 1, 2026. The registry checks are for the US products. If banned-substance testing matters to you (competitive athletes, anyone drug-tested), check the registry yourself before you buy.
Want the full data table?
This page is the curated buying guide — the picks worth your money. If you want every product's exact sodium, potassium, magnesium, sugar, and cost side by side (plus the WHO ORS reference and a DIY recipe), that lives on Electrolyte Formulas Compared, along with a use-case picker. The complete dataset is also a public CC BY JSON file.
What most people get wrong
"Electrolytes" doesn't mean "enough sodium"
Sodium is the electrolyte you lose most in sweat and the one that drives fluid absorption. A product featuring "electrolytes" on the front but listing under ~100 mg sodium is closer to flavoured water. Check the actual milligrams, not the marketing.
You probably don't need one every day
If you eat a normal diet and exercise under an hour, food and water usually cover it — the usual cases for supplementing are heavy sweating and keto or fasting. We break these down in the dosage guide.
Coconut water is the wrong shape
Coconut water is high in potassium but low in sodium — roughly the opposite of what you lose in sweat — so it's a weak rehydration choice unless it's sodium-fortified.
Price check · Electrolytes
What Electrolytes actually costs across the brands we track
What you pay. The 11 Electrolytes products here run $0.52 to $1.85 a day across 10 brands, a 3.6× gap. Some of these state a certification on the listing itself. That is a weaker claim than a certifier confirming it: a listing repeats what the brand says, and a registry entry shows what a certifier has checked.
Method: the 11 Electrolytes products in our catalogue, each priced at its own labelled serving rather than by pack size, across 10 brands. How we price.
Frequently asked questions
What is the best electrolyte drink?
It depends on use case. Balanced, and listed in NSF Certified for Sport → Transparent Labs Hydrate. Keto/heavy sweat → LMNT (1,000 mg sodium). ORS-style → DripDrop. Also listed in NSF Certified for Sport → BUBS. Cheapest → Ultima, or DIY at ~$0.05/serving.
Are electrolyte drinks third-party tested?
5 of the 12 electrolyte drinks we compare are listed in a lab-testing registry for the product we price: BUBS Naturals Hydrate or Die and Transparent Labs Hydrate in NSF Certified for Sport, and Redmond Re-Lyte, Nuun Sport and SaltStick FastChews in Informed Choice (product lines). NSF lists other flavors or stick sizes of Liquid I.V. Sugar-Free Hydration Multiplier and DripDrop ORS, not the ones we price. We found no listing for LMNT Recharge, Liquid I.V. Hydration Multiplier, Gatorade Gatorlyte, Pedialyte Powder Packs and Ultima Replenisher. Registries read Aug 25 to Oct 1, 2026. The registry checks are for the US products.
Is LMNT worth the price?
Its label lists 1,000 mg sodium and zero sugar. It costs about $1.50 per serving, it states no certification, and a homemade mix costs about $0.05 per serving.
How much sodium should an electrolyte drink have?
Depends on the job: 500–1,000 mg for heavy sweat or keto; 200–300 mg for everyday use; under ~100 mg is basically flavoured water. See the dosage guide for your situation.
Related
- Electrolyte dosage guide — how much sodium you actually need, by situation
- Formulas compared + DIY — pick by use case, or make your own
- LMNT vs Liquid I.V. — the two big brands, head to head
- Best magnesium supplements — most electrolyte drinks are low in magnesium
Sources
- World Health Organization. "Oral Rehydration Salts: Production of the new ORS." WHO, 2006. (245 mOsm/L reduced-osmolarity formula.)
- Baker LB. "Sweating Rate and Sweat Sodium Concentration in Athletes." Sports Med. 2017. PMID: 28332116
- Wright EM, Loo DDF, Hirayama BA. "Biology of human sodium glucose transporters." Physiol Rev. 2011. PMID: 21527736
- Manufacturer Nutrition/Supplement Facts panels for all listed products (cross-checked across two independent label passes) + Amazon pricing from our last price check. Full dataset: /electrolytes/formulas-compared.json (CC BY 4.0).