Best Electrolyte Supplements 2026: LMNT vs Liquid IV vs Nuun (Ranked by Science)
| Category | Product | Why We Picked It | Price |
|---|---|---|---|
| 🥇 Best for athletes | LMNT Electrolyte Drink Mix (variety pack) | 1,000mg sodium per packet, zero sugar, clinically meaningful | Check Price → |
| 🥈 Best everyday hydration | Liquid IV Hydration Multiplier (variety) | CTT delivery, 500mg sodium, 11g sugar, mainstream favourite | Check Price → |
| 🥉 Best for keto/low-carb | Ultima Replenisher Electrolyte Powder | Zero sugar, zero carb, all 6 electrolytes, vegan | Check Price → |
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Quick answer: The best electrolyte supplement is LMNT for athletes and low-carb dieters (1,000mg sodium per serving — the only clinically meaningful dose), Liquid IV for general hydration, and Nuun for casual exercisers who want low calories. Most electrolyte products are dramatically under-dosed on sodium because high sodium tastes salty and consumers associate it with being unhealthy. This is a marketing decision, not a nutritional one.
Why Sodium Is the Critical Electrolyte
Electrolytes — sodium, potassium, magnesium, and chloride — maintain fluid balance, nerve signalling, and muscle contraction. During exercise, sweating depletes all of them, but sodium is lost in the highest quantities: approximately 900mg per litre of sweat. Most commercial electrolyte products provide 100–200mg sodium per serving — a fraction of what’s actually lost during exercise.
LMNT vs Liquid IV vs Nuun — Comparison
| LMNT | Liquid IV | Nuun Sport | |
|---|---|---|---|
| Sodium | 1,000mg ✅ | 500mg | 300mg |
| Potassium | 200mg | 380mg | 150mg |
| Sugar | 0g ✅ | 11g | 1g |
| Price/serving | ~$1.50 | ~$1.60 | ~$0.80 |
| Best for | Athletes, keto, heavy sweaters | General hydration, travel | Casual exercise |
When You Need Electrolytes
- You need electrolytes: Exercise lasting 60+ minutes, especially in heat; low-carb or keto diet; regular sauna use; heavy sweating at work
- You probably don’t need them: Light exercise under an hour; sedentary days; normal mixed diet with adequate sodium
- Plain water is fine for: Most hydration needs in non-athletes eating a normal diet
A 2019 study in Nutrients found sodium supplementation at 1,000mg/hour during prolonged exercise significantly improved performance and reduced muscle cramping vs placebo. The 1,000mg per serving in LMNT aligns directly with this evidence base.
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- 1Shirreffs SM & Sawka MN. (2011). Fluid and electrolyte needs for training, competition, and recovery. JISSN, 8(Suppl 1), S23. View source →PubMed
- 2Convertino VA, et al. (1996). American College of Sports Medicine position stand: exercise and fluid replacement. Med Sci Sports Exerc, 28(1), i–vii. View source →PubMed
- 3Baker LB. (2017). Sweating rate and sweat sodium concentration in athletes. Annals of Nutrition and Metabolism, 71(Suppl 2), 12–20. View source →PubMed
