Ultima Replenisher Daily Electrolyte — Original Variety Pack Review
#4 of 9 · Best magnesium-forward✓ Label verified · Supplement Facts read Sep 7, 2026Real retailer photo, cut out. Label unedited.
Consider it. The sugar-free, magnesium-forward pick — minerals without the salt load. Ultima delivers a full 6-electrolyte profile with a strong 100 mg magnesium, plus zinc and vitamin C, at zero sugar and zero calorie.
$20$1.00 / stick
Why It Scores 7.5 — And The Label Line Behind Each Number
Sodium & electrolyte dose
30% of scoreThe weak axis, by design. At ~55 mg, Ultima's sodium is the lowest in the lineup by a wide margin — a deliberate choice to provide minerals without a salt load, but a poor fit for the heavy-sweat and keto use-cases where sodium is the limiting electrolyte. On the decisive axis it scores low; the points come from elsewhere.
- Sodium
- ~55 mg per stick
Clean formula
25% of score0 g sugar and zero calorie, sweetened with organic stevia, vegan and non-GMO. As clean as the category gets on the sugar-and-additives metric, and fully compatible with fasting and calorie goals. Just shy of perfect only because stevia divides palates.
- Sweetener
- Organic stevia leaf — sugar-free, zero calorie
- Form
- Powder stick packs (1 stick in 16 oz water); variety pack
Full mineral spectrum
20% of scoreA real strength. A full 6-electrolyte profile (sodium, potassium, magnesium, calcium, chloride, phosphorus) with a standout 100 mg magnesium — one of the highest here — plus zinc and vitamin C. A genuinely complete mineral spread; only the sodium within it is deliberately minimal.
Value per serving
15% of scoreAbout $1.00 a stick ($20 for 20), with the variety pack letting you sample flavors before committing and cheaper bulk canisters available. Strong value for a sugar-free, full-spectrum, high-magnesium mix.
- Count
- 20 stick packs (variety)
- Price
- $20 ≈ $1.00 per stick
Taste & mixability
10% of scoreLight, pleasant flavors that dissolve cleanly, and the variety pack helps you find one you like. As with any stevia-sweetened mix the sweetness is divisive for some — but with low sodium there's no salty edge to overcome, so most find it easy to drink.
- More Specs
- Potassium
- ~250 mg per stick
- Magnesium
- 100 mg per stick
- Calcium
- ~65 mg per stick
- Other
- 6 electrolytes total + zinc & vitamin C
- Sugar
- 0 g sugar (zero calorie)
- Certification
- Vegan, non-GMO per listing; no NSF / Informed Sport claim recorded
Label verified. Every figure read from the Supplement Facts photo, Sep 7, 2026.
Marketing Claims Vs. Reality
A complete 6-electrolyte formula plus zinc and vitamin C.
The 6-electrolyte profile (sodium, potassium, magnesium, calcium, chloride, phosphorus) with added zinc and vitamin C is consistent with the label — a genuinely complete mineral spread, and one of the broadest in the lineup. Accurate as stated.
Sugar-free and zero calorie.
0 g sugar and zero calorie with organic stevia sweetening matches the label. This is a real strength for fasting and calorie-conscious use, and a clear point in the product's favor on the clean-formula axis.
Effective hydration / electrolyte replenishment.
It replenishes magnesium, potassium and calcium well, but 'hydration' in the heavy-sweat sense is limited by its ~55 mg sodium — and the rehydration evidence (Shirreffs 1996) shows sodium is the limiting electrolyte for fluid retention. Effective for everyday mineral top-up; under-dosed on the salt that drives true rehydration after heavy sweat.
What Our Test Actually Found
Built for minerals, not salt — and honest about it
Ultima's whole proposition is the inverse of LMNT's: provide a complete mineral spread, with magnesium front and center, while keeping sodium minimal. That's a legitimate need — plenty of people eat enough salt and want magnesium and potassium for everyday hydration or muscle comfort. The key is matching it to that use-case. As a daily mineral mix it's excellent; as a heavy-sweat or keto salt replacement it's the wrong tool, because ~55 mg of sodium barely registers against real sweat losses.
Standout magnesium for an electrolyte mix
At 100 mg, Ultima's magnesium is among the highest in the lineup and well above the salt-forward picks (LMNT and Redmond both sit at 60 mg). For a buyer whose real interest is magnesium — and there are many — Ultima delivers it inside a complete, sugar-free electrolyte formula rather than as a standalone pill. That's the single best reason to choose it.
Clean, light, and easy to drink daily
Zero sugar, zero calorie, organic stevia, vegan and non-GMO, with light flavors that mix cleanly — Ultima is built for daily compliance. And because the sodium is low, there's no salty edge to push past, so most people find it more immediately pleasant than the high-salt mixes. The variety pack lowers the risk of disliking a flavor before you commit.
The sodium gap defines who it's for
Everything good about Ultima sits next to one limitation: it can't do the heavy-sweat salt-replacement job the top of this list is built for. The rehydration literature is clear that sodium is what makes ingested fluid stay in the body (Shirreffs 1996), and ~55 mg doesn't meet that need. So the buyer math is simple — if you want minerals and magnesium for everyday hydration, Ultima is a strong, clean choice; if you sweat hard or eat low-carb and need sodium, buy LMNT (#1) or Redmond Re-Lyte (#2).
Full analysis: all pros & cons (7), buy if / skip if
- Sugar-free and zero-calorie with a notably high 100 mg magnesium per serving
- Full 6-electrolyte profile plus zinc and vitamin C; vegan, keto-friendly (on sugar), non-GMO
- Light, pleasant flavors that mix cleanly; variety pack to sample before committing
- Strong value at about $1.00 a serving, with cheaper bulk canisters available
- Very low sodium (~55 mg) — not suited to heavy-sweat or keto salt needs
- The headline electrolyte (sodium) is the one it deliberately under-doses
- Stevia sweetness is divisive for some palates
- You want magnesium, potassium and minerals for everyday hydration rather than a salt dose
- You want zero sugar and zero calorie — it won't break a fast or add calories
- You specifically want a high magnesium dose (100 mg) in an electrolyte mix
- You want to sample flavors at a low cost per serving via the variety pack
- You're a heavy sweater or on keto and need real sodium — ~55 mg is far too low
- You want the headline electrolyte (sodium) dosed properly — LMNT (#1) gives 1000 mg
- You dislike stevia sweetness
Ultima delivers a full 6-electrolyte profile with a strong 100 mg magnesium, plus zinc and vitamin C, at zero sugar and zero calorie. It's an excellent everyday-hydration and mineral mix, especially if magnesium is what you care about. The deliberate trade-off is very low sodium (~55 mg) — far too little for heavy sweat or keto salt replacement. Consider it if you eat enough salt and want minerals and magnesium for daily use; skip it if you sweat heavily or need real sodium, where LMNT (#1) or Redmond Re-Lyte (#2) belong.
Ultima Replenisher is the sugar-free, mineral-rich choice for people who specifically don't want a salt load. It runs a full 6-electrolyte profile — sodium, potassium, magnesium, calcium, chloride and phosphorus — with a notably strong 100 mg of magnesium, plus zinc and vitamin C, all at zero sugar and zero calorie and sweetened with organic stevia. If your interest in electrolytes is really about magnesium, potassium and everyday hydration rather than replacing heavy sweat losses, this is one of the best fits in the lineup. The honest catch is the headline electrolyte. At ~55 mg, Ultima's sodium is by far the lowest here — a fraction of LMNT's 1000 mg — which makes it the wrong tool for heavy sweat, hot-weather training, or keto salt replacement. It lands at #4 because it nails a different job from the salt-forward leaders: a complete, sugar-free mineral spread with standout magnesium. Consider it if you want minerals without salt; look higher up the list if sodium is what you're actually short on.
The everyday mineral mix — buy it for magnesium, not for salt.
Ultima Replenisher is the sugar-free, mineral-rich pick for people who specifically don't want a salt load. A strong 100 mg magnesium, ~250 mg potassium and calcium across a full 6-electrolyte profile, plus zinc and vitamin C — all zero sugar and zero calorie — make it an excellent everyday-hydration choice, and the best in this lineup if magnesium is what you actually care about. The catch is the headline electrolyte. At ~55 mg, its sodium is far too low for heavy sweat, hot-weather training, or keto salt replacement — and that's the job the rehydration evidence and the top of this list are built around. So the call is genuinely use-case dependent: consider Ultima if you eat enough salt already and want minerals and magnesium for daily hydration; if you're sweating buckets or low-carb, look to LMNT (#1) or Redmond Re-Lyte (#2) for the sodium Ultima deliberately leaves out.
If This Doesn’t Fit — Try These
01LMNT Zero Sugar
LMNT is the category benchmark because it solves the problem most mixes ignore: it actually delivers sodium, 1000 mg per stick, several times what mainstream hydration powders give you.
03Key Nutrients Electrolyte Recovery
Key Nutrients is the value play: a zero-sugar, zero-calorie 6-electrolyte mix bundled with vitamins at roughly $0.85 a packet, made in the USA, with even cheaper bulk canisters available.
09Liquid I.V. Hydration Multiplier
Liquid I.V. is the brand most people already know, and its glucose-paired formula genuinely drives fast fluid uptake — useful for everyday dehydration, travel, or a rough morning after.
Quick Answers
Why is Ultima's sodium so low?
It's a deliberate design choice, not an oversight. Ultima is built for people who want the other electrolytes — especially magnesium — without a salt load. At ~55 mg, its sodium is the lowest in this lineup by a wide margin (LMNT has 1000 mg). That makes it a poor fit for heavy sweat or keto salt replacement, but a good one if you eat enough salt already and just want magnesium, potassium and calcium for everyday hydration. Match it to your actual need: minerals, not salt.
Is Ultima good for keto?
Partly. It's zero sugar and zero calorie, so it won't break a fast or knock you out of ketosis — that part is keto-compatible. But the main reason keto dieters use electrolytes is to replace the sodium their diet flushes out, and Ultima's ~55 mg barely touches that. So for the magnesium and potassium side of keto it's fine; for the sodium side it's far too light, and you'd want LMNT (#1) or Redmond Re-Lyte (#2) instead.
How much magnesium does Ultima have, and is that a lot?
100 mg of magnesium per stick — one of the highest in this lineup, alongside Trace Minerals Power Pak (200 mg). For an electrolyte mix that's a genuinely strong magnesium dose, which is why we tag it the magnesium-forward pick. If your interest in electrolytes is really about magnesium for everyday hydration or muscle comfort rather than salt, Ultima delivers that better than the salt-forward picks.
What's in Ultima besides the main electrolytes?
It's a full 6-electrolyte formula — sodium, potassium, magnesium, calcium, chloride and phosphorus — plus zinc and vitamin C, all at zero sugar and zero calorie, sweetened with organic stevia. It's vegan, keto-friendly (on sugar) and non-GMO. So you get a complete mineral spread and a couple of useful extras; the one thing it deliberately keeps low is sodium.
Is the variety pack worth it?
It's a low-risk way to find a flavor you like before committing to a single-flavor box, at about $1.00 a serving. Ultima's flavors are light and generally well-liked, though as with any stevia-sweetened mix the sweetness divides some palates. If you already know your flavor, single-flavor canisters can lower the per-serving cost further.
Sources & Further Reading
3 peer-reviewed sources, each linked to PubMed
- [1] Shirreffs 1996 PMID 8897383 — Post-exercise rehydration in man: effects of volume consumed and drink sodium content. Sodium content determines how much ingested fluid is retained rather than urinated away — the evidence that explains why Ultima's very low sodium limits it for true heavy-sweat rehydration, even as its other minerals are well dosed.
- [2] Sawka 2007 PMID 17277604 — American College of Sports Medicine position stand. Exercise and fluid replacement. The ACSM position stand emphasizing sodium replacement when sweat losses are large — context for why a low-sodium mix like Ultima suits everyday mineral top-up more than hard-sweat hydration.
- [3] Hew-Butler 2015 PMID 26227507 — Statement of the 3rd International Exercise-Associated Hyponatremia Consensus Development Conference, Carlsbad, California, 2015. The consensus that most casual exercisers don't need aggressive electrolyte supplementation — supportive of Ultima's modest, everyday-hydration positioning for people who already eat enough salt.
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