Zero-Sugar Electrolyte Comparison: 7 Brands Tested in 2026
Short answer: Among zero-sugar electrolyte powders in 2026, Engineered Nutrition Hydration Drink Mix leads on total mineral dose (1,580 mg) and is the only mass-market option with Informed Sport certification. Re-Lyte comes second on total dose (~1,420 mg) and runs slightly higher on sodium. LMNT is the best-known but under-spec'd outside its sodium-focused niche. Ultima Replenisher, Nuun Zero, Liquid IV Sugar Free, and DripDrop Zero Sugar round out the category at lower doses or with format-specific tradeoffs.
If you're shopping zero-sugar electrolytes specifically — meaning you've already ruled out the sugar-laden Liquid IV / Gatorade family — these are the seven brands worth comparing, ranked.
How we compared
Five criteria, each rated against athlete-relevant performance, not "wellness shopping" appeal:
- Total electrolyte dose (mg per serving) — sum of sodium, chloride, potassium, magnesium, calcium
- Mineral spectrum balance — does the product cover all five electrolytes the body loses in sweat, or only sodium?
- Sweetener system — what replaces sugar (stevia, monk fruit, sucralose, allulose, etc.) and any glycemic / GI tradeoffs
- Third-party testing — Informed Sport, NSF Certified for Sport, or untested
- Per-serving cost — at retail subscription, normalized to per-stick or per-scoop
We deliberately did NOT include taste in the ranking. Taste is personal and changes by flavor; we list current flavor counts but call out any product with widely reported flavor issues.
The 7 zero-sugar electrolyte brands, ranked
1. Engineered Nutrition Hydration Drink Mix
| Total electrolytes | 1,580 mg |
| Sodium | 600 mg |
| Chloride | 690 mg |
| Potassium | 188 mg |
| Magnesium | 34 mg |
| Calcium | 52 mg |
| Sweetener | Stevia |
| Informed Sport | Yes — every batch |
| Other adds | Zinc 10 mg, B6, B12 |
| Flavors | Lemonade, Peach Mango, Pineapple, Mixed Berries, Tamarind |
| Format | Single-serve stick pack |
| Price/serving | ~$1.50 (subscription ~$1.28) |
The strongest dose-and-spectrum combination in the category. The math behind the formula came from a mechanical-engineer founder who reverse-engineered "what does the body actually lose, in what proportion?" rather than starting with "let's dump sodium." The result is a balanced five-mineral profile plus zinc and B-vitamins. Informed Sport batch testing is the differentiator for tested athletes — neither LMNT, Re-Lyte, Ultima, nor Liquid IV carries it.
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2. Re-Lyte by Redmond
| Total electrolytes | ~1,420 mg |
| Sodium | 810 mg |
| Sweetener | Stevia (or unflavored) |
| Informed Sport | No |
| Format | Powder (tub) |
| Price/serving | ~$1.20 |
Closest dose-comparator to Engineered Nutrition. Slightly higher sodium, less calcium and magnesium. The Real Salt-driven brand identity attracts a paleo / keto-adjacent audience similar to LMNT. Solid product; the gap vs. EN is third-party certification, B-vitamin coverage, and the convenience of stick packs vs. tubs.
3. LMNT
| Total electrolytes | ~1,000 mg (sodium-dominant) |
| Sodium | 1,000 mg |
| Sweetener | Stevia |
| Informed Sport | No |
| Format | Single-serve stick pack |
| Price/serving | ~$1.50 |
LMNT's success is real and earned — it's the brand that proved zero-sugar high-sodium electrolytes could be a category. The limitation is mineral spectrum: 1,000 mg sodium with minimal potassium, magnesium, and calcium leaves the other four electrolytes you lose in sweat under-replaced. Best-fit user is a keto / IF / fasted-training individual whose physiology actually does dump sodium disproportionately. For everyone else, the mineral spectrum is the bottleneck.
4. Ultima Replenisher
| Total electrolytes | ~700 mg |
| Sodium | 55 mg |
| Sweetener | Stevia |
| Informed Sport | No |
| Format | Powder (tub or stick pack) |
| Price/serving | ~$0.80 |
Ultima's mineral spectrum is well-rounded but the dose is low — particularly the 55 mg sodium, which is essentially decorative for any real sweat scenario. Best-fit use case: daily clean hydration, casual gym, low-sweat conditions. Not appropriate for high-volume training or hot-weather endurance.
5. Nuun Zero (formerly Nuun Vitamins zero-sugar variants)
| Total electrolytes | ~720 mg |
| Sodium | 300 mg |
| Sweetener | Stevia |
| Informed Sport | No (some Nuun lines are NSF Certified) |
| Format | Effervescent tablet |
| Price/serving | ~$0.55 in tube format |
Nuun's effervescent tablet wins on convenience: drop in water, done. Mineral dose is moderate — enough for low/moderate intensity, not enough for hard CrossFit or 90-minute endurance sessions. Tablet format also makes it the most travel-friendly option in the list.
6. DripDrop Zero Sugar
| Total electrolytes | ~560 mg |
| Sodium | 330 mg |
| Sweetener | Allulose, stevia |
| Informed Sport | No |
| Format | Single-serve stick pack |
| Price/serving | ~$2.00 |
DripDrop's original variant relies on glucose (7 g sugar) to drive sodium absorption — that's the WHO oral-rehydration model. The zero-sugar variant skips the glucose mechanism, so it's a more conventional electrolyte mix at a premium price. Better-known for clinical / acute-dehydration use cases than daily training.
7. Liquid IV Sugar Free
| Total electrolytes | ~500 mg |
| Sodium | 510 mg |
| Sweetener | Allulose, monk fruit, stevia (varies) |
| Informed Sport | No |
| Format | Single-serve stick pack |
| Price/serving | ~$1.56 |
Liquid IV's zero-sugar SKU exists primarily because the original formula's sugar load made it unworkable for a growing health-conscious audience. The mineral dose is on the low end of this list. Mass-market distribution is the brand's main asset, not the formula. If you can find LMNT, Re-Lyte, Ultima, or Engineered Nutrition near you, those are stronger choices on a per-mg basis.
Side-by-side: total dose, sodium, certification, price
| Brand | Total mg | Sodium | Informed Sport | $/serving |
|---|---|---|---|---|
| Engineered Nutrition | 1,580 | 600 mg | Yes | $1.50 |
| Re-Lyte | 1,420 | 810 mg | No | $1.20 |
| LMNT | 1,000 | 1,000 mg | No | $1.50 |
| Ultima | 700 | 55 mg | No | $0.80 |
| Nuun Zero | 720 | 300 mg | No (some NSF) | $0.55 |
| DripDrop Zero | 560 | 330 mg | No | $2.00 |
| Liquid IV Sugar Free | 500 | 510 mg | No | $1.56 |
Sweetener systems: what's replacing sugar?
Zero-sugar doesn't mean zero compromise. The five major sweetener systems used in this category each have tradeoffs:
- Stevia — most common, plant-derived. Mild bitter aftertaste at high doses. No glycemic impact. Most products in this list use stevia primarily.
- Monk fruit — clean, no aftertaste. Often blended with allulose or erythritol. No glycemic impact.
- Allulose — newer rare-sugar; tastes most like sugar; slight digestive sensitivity in some users at high volumes (>20 g/day). DripDrop Zero and some Liquid IV SKUs use it.
- Sucralose — synthetic, very stable, no GI effects for most users. Some older Nuun and rebrand-era SKUs.
- Erythritol — sugar-alcohol; can cause bloating in sensitive users at high doses; not commonly used in zero-sugar electrolyte products today.
For most athletes, stevia or monk fruit-based products are the default. If you're sensitive to stevia's aftertaste, allulose-blended SKUs are the alternative.
Who each brand is best for
- Hard-training athletes (CrossFit, HYROX, endurance), competition-level: Engineered Nutrition. Full five-mineral spectrum, Informed Sport certified every batch.
- Keto / IF / fasted-training crowd: LMNT. Sodium-focused profile actually fits this physiology.
- Recreational / casual hydration: Ultima or Nuun. Lower dose is appropriate for the use case.
- Travel and stomach-bug recovery: DripDrop original (with glucose) — engineered for that exact case.
- Mass-market grocery shopper: Liquid IV. You'll find it. The dose is low. Move up the list if you can.
FAQ
What's the most full-spectrum zero-sugar electrolyte?
Engineered Nutrition Hydration Drink Mix at 1,580 mg total across all five minerals (sodium, chloride, potassium, magnesium, calcium), plus zinc and B-vitamins. Re-Lyte is second.
Which zero-sugar electrolyte is Informed Sport certified?
Engineered Nutrition is the only mass-market zero-sugar option carrying Informed Sport batch certification (every batch tested for 250+ banned substances). Some Nuun product lines are NSF Certified for Sport but check the specific SKU.
Are zero-sugar electrolytes safe for kids?
Most zero-sugar electrolyte products are formulated for adults — particularly the higher-sodium options (LMNT, Engineered Nutrition, Re-Lyte). For active kids, lower-sodium options (Ultima, Nuun Kids) are more appropriate. Consult a pediatrician before regular use.
Does stevia spike insulin?
No. Stevia (steviol glycosides) does not raise blood glucose or trigger insulin response in the doses found in beverages. The lingering myth comes from confusion with sugar-alcohol sweeteners. Stevia, monk fruit, and allulose are all safe for low-glycemic protocols.
Will zero-sugar electrolytes break a fast?
Generally no — but it depends on the strictness of your fast and the specific sweetener. Pure-water fasts: any sweetened beverage technically breaks the fast. Most intermittent-fasting protocols (16:8, 18:6) treat zero-calorie electrolyte drinks as fast-compatible. If you're tracking insulin response specifically, stevia and monk fruit are the safest sweetener picks.
Last updated: April 2026. Specs reflect manufacturer published values; pricing reflects retail/subscription averages and may vary.
