Ultima Replenisher
Daily hydration seekers who want zero-sugar, zero-calorie electrolytes with clean ingredients
Nuun Sport Hydration
Active people who want ultra-portable, low-calorie electrolytes for everyday hydration
Score Comparison
Pricing & Features
Making Your Decision
When to Choose Ultima Replenisher
Daily hydration seekers who want zero-sugar, zero-calorie electrolytes with clean ingredients
Ultima Replenisher is one of the cleanest zero-calorie electrolyte options with no sugar, artificial sweeteners, or fillers. The very low sodium makes it better for daily hydration than athletic performance. The wide flavor variety and affordable bulk pricing add practical appeal.
Strengths
- Zero sugar, zero calories, zero artificial ingredients — one of the cleanest formulas available
- Contains 6 electrolytes plus trace minerals and support vitamins
- Available in stick packs and bulk canisters with 10+ flavor options
Limitations
- Uses stevia and citric acid which some find creates a slightly tart aftertaste
- Sodium content (55mg) is very low — insufficient for heavy sweating or athletic use
- Plant-based colors may cause slight staining of water bottles over time
When to Choose Nuun Sport Hydration
Active people who want ultra-portable, low-calorie electrolytes for everyday hydration
Nuun's effervescent tablet format is unmatched for convenience — drop one in your water bottle and go. The low sugar and calorie count make it ideal for daily use. The trade-off is lower electrolyte content per serving, making it better for light activity than extreme exertion.
Strengths
- Unique effervescent tablet format — just drop in water, no scooping or stirring
- Only 1g sugar and 15 calories per tablet — among the lightest options
- Compact tube is ultra-portable for hiking, travel, and gym bags
Limitations
- Lower electrolyte content per tablet (300mg sodium) than powder competitors
- Contains stevia leaf extract which some find has a lingering aftertaste
- Tablets can be slow to fully dissolve in cold water
