Ultima Replenisher Review: Sodium, Ingredients and Price vs 4 Alternatives

Reviewed by Sarah Law, Dip CNM, Naturopathic Nutritionist

Published 10 November 2026. Every Ultima Replenisher, LMNT, Liquid I.V. and Nuun figure on this page comes from the brand's own website, nutrition panel or ingredient list, read on 10 November 2026. Our own figures come from our printed labels, and our prices were read live from our UK and US stores the same day.

Ultimate Electrolytes: 500 mg sodium, 500 mg potassium and 150 mg magnesium per 500 ml serving, no sugar, sweetened with stevia, six flavours including Unflavoured.

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What is in Ultima Replenisher? The label, serving by serving

Ultima Replenisher Daily Electrolyte Drink Mix is a powder sold in single stickpacks (6, 20 or 36 to a box) and in 30-serving and 90-serving canisters. Ultima's own nutrition panel, the same on the Lemonade and Raspberry flavours we read, lists six electrolytes plus vitamin C, zinc and manganese per stickpack or scoop, with 0 calories, 0 g of carbohydrate and 0 g of sugars. Ultima's directions are one stickpack or one scoop in 16 oz (about 473 ml) of water.^17,18

Source: ultimareplenisher.com Lemonade and Raspberry product pages, nutrition facts as published, read 10 November 2026. Ultima does not state a stickpack or scoop weight on these pages.

The Lemonade ingredient list reads: citric acid, magnesium citrate, potassium phosphate, natural lemon flavour (with other natural flavours), potassium aspartate, salt (sodium chloride), calcium ascorbate, calcium citrate, Rebaudioside A (organic stevia leaf extract), calcium lactate, zinc citrate and manganese citrate. Raspberry adds malic acid and a colour blend of beet juice and annatto. Salt sits sixth on the list, which is why the sodium figure is so low; the magnesium comes from magnesium citrate and the potassium from potassium phosphate and potassium aspartate.¹⁷

Ultima describes the core flavours as caffeine-free, vegan, gluten-free and keto-friendly, and its FAQ says its mixes are Non-GMO Project Verified. Two products in the wider range differ: Daily Focus contains 60 mg of caffeine from green tea extract per serving, and the TeaFresher flavours contain a trace. Ultima's FAQ also notes that its facilities process materials that may contain peanuts and tree nuts.¹⁸

Who Ultima Replenisher suits, and who needs more sodium

Ultima suits people who want a flavoured, zero-sugar drink to make plain water easier to get down on an ordinary day, and who like the idea of some extra magnesium and potassium without much salt. Ultima's own FAQ is clear about the design choice: most Americans already get enough salt, so it limited the sodium to make the drink suit daily use, and it pushed magnesium higher because many people fall short of it.¹⁸ For a desk day, a commute or a long flight, that is a reasonable brief.

It suits heavy sweaters less well. If you have just run for an hour in the heat, played a long match or finished a hot class, the sodium you lost in sweat is likely to be measured in hundreds or thousands of milligrams, and 55 mg replaces very little of it. In that situation a higher-sodium drink, or water with a salty meal, does the job Ultima was not designed to do. Low-carb eaters who are watching their sodium intake from food fall in between: Ultima's carbohydrate-free panel fits keto, but if you are cutting salt-rich processed food at the same time you may want more sodium than Ultima gives. Our guide to electrolytes on keto and fasting covers that case, and our article on whether you can drink electrolytes every day covers daily use of any mix.

"For a lot of my clients the most useful electrolyte drink is the one they will actually reach for, and a light, low-sodium mix can help someone who finds plain water a chore drink more across the day. After a long, sweaty session, though, I look for a drink with real sodium in it, or a salty meal alongside the water."

Sarah Law, Naturopathic Nutritionist | Optimised Female

Does 55 mg of sodium hydrate you? What the research says

For everyday drinking, a low-sodium mix hydrates you about as well as the water it is mixed into; after sweating, more sodium helps you keep more of what you drink. Ultima's product page says it helps your body absorb and retain water more effectively than plain water alone.¹⁷ The published research suggests the amount of sodium in the drink is a large part of that story.

In a rehydration study from Aberdeen, six men were dehydrated by about 1.9% of body mass with exercise in the heat, then drank one and a half times the fluid they had lost. The drinks were identical except for sodium: 2, 26, 52 or 100 mmol/L. Urine output fell as sodium rose. Five and a half hours later the men were about 689 ml short on the 2 mmol/L drink and 359 ml short on 26 mmol/L, while on 52 and 100 mmol/L they were roughly back to balance.¹ A follow-up study from the same group found that drinking more than you lost only helped when the drink also carried enough sodium.²

Here is how the products on this page compare on that scale, mixed as each brand directs:

Our arithmetic: sodium in mg divided by 23 gives mmol, divided by the litres of water each brand directs. Volumes from each brand's own directions, read 10 November 2026; ours from our printed label.

Two caveats keep this fair. First, the Aberdeen trials were about rehydrating after real fluid loss, not about a normal day. When 72 men who were already well hydrated drank a litre of 13 different drinks, a sports drink produced the same urine output as still water over four hours; only an oral rehydration solution and milk were retained better.⁶ So on a quiet day, any drink you enjoy that gets you drinking does the main job. Second, sweat losses vary enormously. Across 1,303 athletes tested by the Gatorade Sports Science Institute, endurance athletes lost an average of 51.7 mmol of sodium an hour, about 1,190 mg, and American football players 55.9 mmol, about 1,290 mg, with wide spread around those averages.^3,4 One Ultima serving covers about 5% of a typical endurance athlete's hourly sodium loss. The American College of Sports Medicine's position stand recommends that people who sweat heavily replace sodium as well as water.⁵

Ultima vs LMNT vs Liquid I.V.: label comparison

Ultima has the least sodium and the most vitamin C of the five products here, and the second-highest magnesium after ours. LMNT sits at the opposite end with 1,000 mg of sodium. Liquid I.V. Sugar-Free is in the middle on sodium with added B vitamins, Nuun Sport is a light tablet with 1 g of sugar, and Ultimate Electrolytes gives the most potassium and magnesium per serving with nine times Ultima's sodium.

Sources: ultimareplenisher.com nutrition facts and ingredients; drinklmnt.com product and ingredients pages; liquid-iv.com Sugar-Free Lemon Lime nutrition panel; nuunlife.com nutrition information; our printed labels (Raspberry v5, 5 g; Unflavoured v7, 3.2 g; same minerals). All read 10 November 2026. Liquid I.V.'s own FAQ text gives 510 mg sodium and 380 mg potassium; we used the printed panel.^17,20,21,22

Ultima vs LMNT is really a question of what kind of day you are having. LMNT is built for heavy, salty sweaters and gives 18 times Ultima's sodium in one stick; Ultima is built for light, all-day sipping and gives more magnesium (100 mg against 60 mg) and a little more potassium. Ultima vs Liquid I.V. Sugar-Free is closer on potassium, but Liquid I.V. carries about nine times the sodium plus a set of B vitamins, while Ultima carries more magnesium and more vitamin C. For the full head-to-head between the two higher-sodium sticks, see our LMNT vs Liquid I.V. comparison and our Liquid I.V. review.

Is Ultima Replenisher worth the price? Cost per serving and per 1,000 mg of sodium

Ultima is good value per serving if you buy the big canister and poor value per milligram of sodium in any pack. At $0.53 a scoop in the 90-serving canister it is the cheapest serving on this page, but because each serving holds only 55 mg of sodium, a gram of sodium from Ultima costs several times what it costs from any of the alternatives.

List prices on each brand's own store on 10 November 2026; Ultima's Amazon UK price is the lowest new offer on listing B091FYB6ZS that day (Amazon itself was not selling it). Ultima's Subscribe & Save takes 10% off with free shipping. Per-serving and per-1,000 mg figures are our simple division. We have not converted between pounds and dollars.

Which number matters depends on why you are buying. If you want a flavoured, zero-calorie drink and see the electrolytes as a bonus, Ultima's canisters are cheap per glass. If you are buying an electrolyte drink to replace what you sweat out, the per-1,000 mg column is the fairer test, and there even Ultima's 90-serving canister costs about four to six and a half times as much per gram of sodium as Nuun, ours or LMNT, and the stickpacks cost more again. On magnesium alone the gap narrows: Ultima's 100 mg costs $0.53 to $1.05, while our 150 mg comes with the 500 mg of sodium and potassium for £0.84 to £0.93 or $0.96 to $1.06.

Ultima Replenisher alternatives: which one fits you?

The right alternative depends on how much you sweat and what else you want in the glass. All four below are sugar-free or close to it; they differ mainly in sodium.

Pick by what you need

• You sweat heavily, train long or work in the heat: LMNT (1,000 mg sodium) is the high end. Our Ultimate Electrolytes (500 mg sodium, 500 mg potassium, 150 mg magnesium) is the middle ground; two scoops across a long session give 1,000 mg of sodium.
• You want the shortest ingredient list: our Unflavoured tub is three mineral salts and nothing else; LMNT Raw Unflavored is the same three salts in a different ratio.
• You want B vitamins in your drink: Liquid I.V. Sugar-Free adds niacin, B6, B12 and pantothenic acid to 500 mg of sodium.
• You want a cheap tablet for the gym bag: Nuun Sport at $0.75 with 300 mg of sodium and 1 g of sugar.
• You just want help drinking more water on a normal day: Ultima does that well, with the most vitamin C and the lowest salt of the group.

If you would rather not add powder to a bottle at all, our Electrolyte Balance capsules give 500 mg of sodium, 210 mg of potassium and 60 mg of magnesium in two capsules, taken with water. For a wider look at the category, our sugar-free electrolyte powder comparison and our electrolyte buyer's guide cover more brands.

Can you buy Ultima Replenisher in the UK?

Not from Ultima directly. Ultima's own site prices everything in US dollars, and its shipping policy offers free standard shipping on Subscribe & Save orders and on orders of $30 or more within the continental US.¹⁹ In the UK, Ultima appears on Amazon through third-party sellers rather than Amazon itself: on 10 November 2026 the lowest new offer for a 20-stickpack box of Lemonade was £21.58, about £1.08 a serving.²³ US shoppers can also find it at Target and Walmart, according to Ultima's store finder. If you want a sugar-free electrolyte sold in pounds, our Ultimate Electrolytes is on our UK store, and the same tubs are sold in dollars on our US store.

How much sodium, potassium, magnesium and vitamin C a day? UK and US guidance

UK and US guidance use different reference values, so here they are side by side with what one serving of Ultima and one serving of ours provides. Sodium has no UK NRV; the NHS gives a maximum for salt instead.

Sources: NHS salt, vitamin C and vitamins and minerals guidance; FDA sodium and Daily Value guidance; NIH Office of Dietary Supplements potassium, magnesium and vitamin C fact sheets; UK NRVs from Regulation (EU) No 1169/2011 Annex XIII as retained in GB law.^{8,9,10,11,12,13,14,15,16}

Two points follow from the table. The NIH upper limit for magnesium from supplements is 350 mg a day for adults, so several servings of a magnesium-rich drink plus a separate magnesium supplement can add up; three Ultima servings give 300 mg. And the NHS notes that taking more than 1,000 mg of vitamin C a day can cause stomach pain, diarrhoea and flatulence; one Ultima serving is 100 mg, well inside that, but it is worth counting if you also take a vitamin C or multivitamin tablet.^13,15 Magnesium contributes to electrolyte balance and to the reduction of tiredness and fatigue, and potassium contributes to normal muscle function.

Who should check before using Ultima or any electrolyte drink?

Speak to your doctor or pharmacist first if you have been told to limit salt or potassium, have kidney disease, heart failure or high blood pressure, or take medicines that affect sodium, potassium or fluid balance, such as some blood pressure tablets and diuretics. Ultima's low sodium does not remove the potassium question: one serving gives 250 mg of potassium and 100 mg of magnesium. The same advice applies in pregnancy and breastfeeding, and before giving any electrolyte product to a child; Ultima itself says its products are formulated for adults and suggests talking to a paediatrician first.¹⁸ If you are losing fluid through illness, follow your doctor's or pharmacist's advice on an oral rehydration product: a sugar-free electrolyte drink is not the same as a medical oral rehydration solution, which uses glucose to help the gut absorb sodium and water.⁷

"Read the whole panel, not just the headline electrolytes. Some everyday mixes add vitamin C, zinc or caffeine, so if you already take a multivitamin or drink a few coffees, add those up across the day. And if you take medicines that affect potassium, or you have been told to watch your salt, check with your GP or pharmacist before making any electrolyte drink a daily habit."

Sarah Law, Naturopathic Nutritionist | Optimised Female

How Ultima and Ultimate Electrolytes are tested

Asked whether its products are third-party tested, Ultima's product-page FAQ answers that its hydration products are Non-GMO Project Verified, a verification of non-GMO ingredients and facilities, and its main FAQ says it tests regularly to the FDA's 20 ppm gluten-free standard.^17,18 We did not find a sport-specific certification, such as NSF Certified for Sport or Informed Sport, on the Ultima pages we read. That matters mainly to drug-tested athletes, who should look for a certified product whatever they buy.

For Ultimate Electrolytes, we publish the lab results behind our label claims. Lot 33447931 measured 610 mg sodium, 564 mg potassium and 165 mg magnesium per 5 g serving at Certified Group, an ISO/IEC 17025 accredited laboratory (report 25-660895), against label figures of 500, 500 and 150 mg. Our testing procedures page explains how batches are checked, and our Ultimate Electrolytes formula breakdown explains each ingredient.

How we compared these products

We read every competitor figure from the brand's own website on 10 November 2026: Ultima's Lemonade and Raspberry product pages, nutrition facts, ingredients, FAQ and shipping policy; LMNT's product page; the Liquid I.V. Sugar-Free Lemon Lime nutrition panel; and Nuun's nutrition information. Ultima's UK price is the lowest new offer on its Amazon UK listing that day. Prices are list prices from each brand's own store, and per-serving costs and sodium concentrations are simple arithmetic. We did not convert any currency. Our own figures come from our printed labels (Ultimate Electrolytes Raspberry v5 and Unflavoured v7) and the Certified Group lab report for lot 33447931. Where a brand does not publish a figure, the table says so rather than estimating it. Formulas and prices change, so check the pack you buy.

Frequently asked questions

About the Reviewer: Sarah Law, Dip CNM

Sarah Law is a Certified Naturopathic Nutritionist and Functional Practitioner specialising in hormonal health, gut health, and evidence-based nutrition. She holds a Diploma in Naturopathic Nutrition from the College of Naturopathic Medicine (CNM, London) and is a Certified Functional Health Coach. Sarah combines naturopathic principles with modern functional nutrition science to help her clients make informed health decisions.

Learn more about Sarah.

About the Author: Ben Law

Ben Law is the founder of Love Life Supplements and host of the Optimised Health Show. He is a qualified Advanced Dietary Supplement Advisor and Primal Blueprint Certified Expert, and has spent 14 years building transparent, research-led formulations manufactured to GMP and BRC standards. He wrote this review from each brand's own product pages, nutrition panels and ingredient lists, the published rehydration and sweat research, NHS, FDA and NIH guidance, and our own label and lab data.

Ultima Replenisher, LMNT, Liquid I.V., Hydration Multiplier and Nuun are trademarks of their respective owners and are not affiliated with Love Life Supplements. Learn more about Ben.