Pedialyte vs Ultima Replenisher: Clinical Sodium Meets Keto Balance

Pedialyte and Ultima Replenisher are both hydration powders, but they were built for different fights. Pedialyte leans into its hospital-grade reputation with megadoses of sodium and potassium paired with glucose, while Ultima doubles down on keto-friendly balance, zero sugar, and an almost $0.30 cheaper serving. The right choice depends on whether you need aggressive recovery or sustainable daily hydration.

Head-to-Head Comparison

Electrolyte Arsenal

Pedialyte is unmatched on sodium and potassium. The 1,080 mg of sodium and 780 mg of potassium per serving are the highest numbers we track, and the brand's medical positioning is no accident—the balances mirror pediatric oral rehydration formulas used in clinics. Ultima Replenisher keeps sodium modest at 270 mg but still delivers a potassium-heavy 325 mg and 60 mg of magnesium, which is rare outside of higher-price keto powders.

Pedialyte is the fatigue buster when your body has dumped liters of fluid. Ultima is the quiet assistant you sip between meetings to keep your electrolytes from dipping without tipping your sugar meter. Neither product pretends to do the other's job.

Sugar, Magnesium, and Perks

Thirteen grams of sugar in Pedialyte are intentional: glucose speeds sodium uptake through intestinal co-transport, which is why hospitals rely on it during vomiting or fever. Ultima skips sugar entirely, letting stevia-based flavoring highlight the mineral profile instead. Magnesium is not disclosed on Pedialyte's current label—treat it as a blank until the brand updates the nutrition facts—while Ultima provides a meaningful 60 mg that helps with cramp-prone athletes and keto adherents.

Price, Format, and Use Case

Ultima costs $0.53 per serving, undercutting Pedialyte by 33%. Pedialyte makes money on convenience with pre-mixed liter bottles, powder packets, and zero sugar stick packs. Ultima only ships powder sachets, which means you always mix on the fly, but the sachets are feather-light and mix cleanly in any water bottle.

If you are stocking a family pantry or packing a recovery fridge, keep Pedialyte liter bottles and freeze the rest for illness or hangovers. If you want to sip something every day without spiking insulin, slip Ultima sachets into your work bag.

Verdict

Pedialyte is the emergency room substitute for your home—use it when your body is in crisis, when you're vomiting, hungover, or battling a fever. Ultima Replenisher is what stays on your desk for the non-crisis days: zero sugar, balanced potassium, and the cheapest price per serving of any brand we track. Buy Pedialyte for acute recovery and Ultima for daily maintenance; both belong in your hydration rotation, but they are not interchangeable.