Ultima Replenisher is a solid electrolyte powder for everyday hydration. It contains zero calories, zero sugar, and delivers six electrolytes in forms your body absorbs easily. For most people, it’s a healthier option than sugar-laden sports drinks, though it’s designed more for daily maintenance than for replacing heavy sweat losses during intense exercise.
What’s Actually in It
Each serving of Ultima Replenisher (the orange flavor, as a representative example) contains citric acid, magnesium citrate, potassium phosphate, potassium aspartate, calcium citrate, natural flavors, calcium ascorbate (a form of vitamin C), salt, stevia leaf extract, beet juice concentrate for color, zinc citrate, and manganese citrate. There are zero calories and zero grams of carbohydrate per serving.
The electrolyte breakdown per serving looks like this:
- Sodium: 55 mg
- Potassium: 250 mg
- Magnesium: 100 mg
- Chloride: 78 mg
- Phosphorus: 70 mg
- Calcium: 47 mg
The mineral forms used here (citrate, aspartate, phosphate) are generally well absorbed. The product is certified non-GMO through IGEN, and it’s labeled soy-free and gluten-free. It’s also vegan and keto-compatible since there are no animal ingredients and no carbohydrates.
How It Compares to Sports Drinks
The biggest difference between Ultima and mainstream hydration products is sugar. A serving of Liquid IV Hydration Multiplier, for instance, has 50 calories and 11 grams of sugar. Gatorade has a similar sugar load. Ultima has none. For people watching their sugar intake, managing blood sugar, or following a low-carb diet, that’s a meaningful advantage.
The tradeoff is sodium. Ultima provides just 55 mg of sodium per serving, while Liquid IV packs in 490 mg. Sodium is the primary electrolyte you lose in sweat, and it drives fluid absorption in the gut. If you’re using an electrolyte drink to recover from a long run, a hot outdoor workout, or a stomach bug, Ultima’s low sodium content may not replace what you’ve lost. For those situations, a higher-sodium product is more appropriate.
Where Ultima stands out is magnesium. At 100 mg per serving, it delivers roughly four times what Liquid IV offers. Many people fall short on daily magnesium, and it plays a role in muscle function, sleep quality, and nerve signaling. For general daily use rather than post-workout recovery, that’s a useful addition.
The Stevia Question
Ultima gets its sweetness from Rebaudioside A, a purified compound from stevia leaf. This is the same high-purity stevia extract approved by food safety agencies worldwide. Research in animal models has found that chronic Reb A consumption did not affect glucose tolerance or insulin sensitivity, and it actually lowered fasting blood sugar slightly compared to controls. There’s some early evidence that stevia compounds may influence gut bacteria composition, though the significance of that for humans isn’t well established yet.
For practical purposes, stevia in this form does not spike blood sugar or insulin. If you’re choosing between stevia-sweetened and sugar-sweetened electrolyte drinks, the stevia version is the better pick for metabolic health.
Does It Hydrate Without Sugar?
Traditional oral rehydration solutions use glucose deliberately. There’s a specific transporter in your small intestine that pulls sodium and water into your bloodstream alongside glucose. Without glucose, that particular pathway doesn’t activate. This is why sugar-based formulas like Liquid IV and Pedialyte emphasize their glucose content.
That said, your gut has other ways to absorb sodium and water. Amino acids, particularly negatively charged ones, can co-transport sodium at a ratio of three sodium molecules per one amino acid molecule. And plain electrolyte solutions still hydrate you, just without the extra boost from that glucose-sodium pump. For everyday hydration, sitting at a desk, light exercise, or just not drinking enough water, Ultima works fine. You don’t need the glucose mechanism unless you’re dealing with significant dehydration.
Citric Acid and Your Teeth
Citric acid is the first ingredient on the label, which means it’s present in the highest proportion by weight. Lab studies show that citric acid erodes dental enamel in a dose-dependent way: lower pH and higher acid concentration both increase erosion. The presence of calcium in the solution can partially offset this effect, and Ultima does contain calcium citrate, which helps somewhat.
This doesn’t mean Ultima is bad for your teeth, but it’s worth being aware of. Sipping any acidic drink slowly throughout the day gives acid more contact time with your enamel. If you drink Ultima regularly, finishing it in a reasonable window rather than nursing it for hours is a simple way to minimize any effect. Using a straw also reduces direct contact with teeth.
Who Should Be Cautious
Ultima delivers 250 mg of potassium per serving. For healthy people with normal kidney function, this poses no risk. The body efficiently eliminates excess potassium through urine, and the National Institutes of Health has not set an upper intake limit for potassium in healthy adults because high intakes simply don’t cause problems when kidneys work properly.
The situation changes if you have chronic kidney disease or take medications that reduce potassium excretion, such as ACE inhibitors or potassium-sparing diuretics. In those cases, even moderate potassium from supplements and fortified drinks can push blood levels too high, a condition called hyperkalemia that affects heart rhythm. If that applies to you, check with your doctor before adding any electrolyte supplement to your routine.
The Bottom Line on Daily Use
Ultima Replenisher is a well-formulated option for people who want electrolytes without sugar, calories, or artificial additives. Its strength is as a daily hydration support: the broad mineral profile, generous magnesium, and clean ingredient list make it a smart choice for routine use. Its weakness is that the low sodium content limits its usefulness for serious rehydration after heavy sweating or illness. If your goal is everyday mineral intake and flavor to help you drink more water, Ultima is a genuinely healthy pick.