Prime vs LMNT: What You’re Actually Drinking (And Paying For)
Electrolyte drinks are everywhere right now. Two of the most talked-about names are Prime and LMNT — but they’re built for completely different jobs.
If you’ve ever grabbed one because it looked good, tasted sweet, or was trending online… this breakdown will save you money, sweeteners, and false expectations.
Let’s cut through the noise.
The One-Line Difference
Prime is flavoured water with minerals.
LMNT is a functional electrolyte formula.
That single difference explains everything that follows.
Prime is designed for mass appeal — easy taste, bright branding, casual sipping.
LMNT is designed to replace the electrolytes you actually lose through sweat, heat, training, fasting, or low-carb living.
Both say “hydration”. Only one is built for it.
Quick Answer: Is Prime or LMNT Better for Hydration?
LMNT is better for real hydration. It contains around 1,000 mg of sodium per serve, which helps your body hold onto water. Prime contains about 10 mg of sodium, making it closer to flavoured water than an electrolyte replacement.
Prime vs LMNT: Electrolyte Comparison
| Feature | Prime Hydration | LMNT Electrolytes |
|---|---|---|
| Format | Ready-to-drink bottle (500 mL) | Powder stick (mix with water) |
| Sodium per serve | ~10 mg | ~1,000 mg |
| Potassium per serve | ~700 mg | ~200 mg |
| Magnesium per serve | 0 mg | ~60 mg |
| Sugar | 0 g (sweetened) | 0 g |
| Taste profile | Sweet, soft-drink-like | Salty (can dilute to taste) |
| Hydration purpose | Casual hydration | Electrolyte replacement |
| Cost per serve (AUD) | ~$4.50–$5.50 | ~$2.10–$2.30 (30-pack) |
| Best for | Flavoured water fans | Sweat, heat, training, low-carb |
Note: Prices vary by retailer and promotions. Electrolyte amounts shown are typical per serve.
Final Thought
Hydration isn’t about what tastes nicest.
It’s about what your body actually needs.
Once you understand that, the Prime vs LMNT debate becomes very simple.