LMNT vs Ultima sounds like a simple electrolyte showdown. It isn’t.

These two powders take almost opposite approaches. LMNT goes extremely hard on sodium, while Ultima spreads its formula across potassium, magnesium, calcium and other minerals while keeping sugar and calories at zero. LMNT provides 1,000 mg sodium, 200 mg potassium and 60 mg magnesium per stick, while Ultima Replenisher provides 55 mg sodium, 250 mg potassium and 100 mg magnesium per serving. (LMNT)

And that’s where this comparison gets interesting.

LMNT feels built for people who want a serious sodium hit. Ultima feels designed for people who want a lighter, sweeter, everyday electrolyte drink.

So which one should you buy?

Choose LMNT when sodium is your main priority. Choose Ultima when you want zero sugar, more potassium and magnesium, and an easier everyday drink.

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LMNT vs Ultima at a Glance

Category	LMNT	Ultima Replenisher	Winner
Sodium	1,000 mg	55 mg	🏆 LMNT
Potassium	200 mg	250 mg	🏆 Ultima
Magnesium	60 mg	100 mg	🏆 Ultima
Calcium	—	47 mg	🏆 Ultima
Chloride	—	78 mg	🏆 Ultima
Calories	0	0	Tie
Sugar	0 g	0 g	Tie
Carbohydrate	0 g	0 g	Tie
Format	Powder stick	Powder/stickpack	Tie
Main strength	High-sodium hydration	Broader mineral profile	Depends

LMNT’s current product information lists 1,000 mg sodium, 200 mg potassium and 60 mg magnesium, with no sugar. (LMNT)

Ultima’s current label lists 55 mg sodium, 250 mg potassium, 100 mg magnesium, 47 mg calcium and 78 mg chloride, with zero calories and zero sugar. (Ultima Replenisher)

That tells you almost everything you need to know about the basic nutritional battle.

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LMNT Crushes Ultima on Sodium

Let’s start with the biggest difference.

LMNT

1,000 mg sodium

Ultima

55 mg sodium

That’s a massive gap.

LMNT contains roughly 18 times as much sodium as Ultima per serving.

This isn’t a tiny label difference.

It’s the defining difference between the two formulas.

LMNT is clearly aimed at people who want a much larger sodium dose, while Ultima takes a dramatically lighter approach.

If you’re comparing these products specifically because you want more sodium, there isn’t much debate.

Sodium winner: 🏆 LMNT

LMNT’s entire formula feels built around that number.

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But Ultima Hits Back With Magnesium

Then the comparison swings completely in the other direction.

Ultima

100 mg magnesium

LMNT

60 mg magnesium

Ultima provides about 67% more magnesium per serving.

That’s a meaningful difference on the nutrition label.

If magnesium is one of the main reasons you’re buying an electrolyte powder, Ultima immediately becomes more attractive.

And because Ultima also provides calcium, phosphorus and chloride, its label looks considerably broader than LMNT’s simple three-electrolyte formula. (Ultima Replenisher)

Magnesium winner: 🏆 Ultima

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Ultima Also Wins Potassium

Potassium is another category where Ultima takes the lead.

Ultima

250 mg potassium

LMNT

200 mg potassium

That’s 50 mg more per serving.

It’s not remotely as dramatic as the sodium difference, but Ultima still wins.

This is part of what makes Ultima feel like a broader mineral product, while LMNT feels much more concentrated around sodium replacement.

Potassium winner: 🏆 Ultima

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Zero Sugar? It’s a Tie

Neither product contains sugar in its standard electrolyte drink mix.

LMNT

0 calories

0 g sugar

Ultima

0 calories

0 g sugar

(LMNT)

So there isn’t much to argue about here.

Sugar winner: Tie

The real question is what kind of zero-sugar drink you want.

LMNT → very salty, high-sodium

Ultima → lighter, sweeter, more fruit-forward

That taste difference can matter more than the sugar number.

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The Real LMNT vs Ultima Battle

People often ask:

“Which one has more electrolytes?”

That question is too simplistic.

There isn’t one magic number that makes an electrolyte powder automatically better.

Look at the individual nutrients.

Sodium

LMNT dominates.

Potassium

Ultima wins.

Magnesium

Ultima wins.

Calcium

Ultima wins.

Chloride

Ultima wins.

Sugar

Tie.

So the better description is:

LMNT is the sodium heavyweight. Ultima is the broader, lower-sodium mineral formula.

That’s the real difference.

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Ultima’s Biggest Weakness? Sodium

Let’s be brutally honest.

55 mg sodium is tiny compared with 1,000 mg.

That’s Ultima’s obvious weakness.

Its potassium is higher.

Its magnesium is higher.

Its calcium is higher.

But none of that changes the central fact:

LMNT delivers dramatically more sodium per serving.

For someone specifically shopping for a high-sodium electrolyte product, Ultima isn’t going to win that battle.

Ultima’s Achilles’ heel: 55 mg sodium

That’s the number you should pay attention to.

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LMNT’s Biggest Weakness? It Is Extremely Salty

LMNT’s biggest advantage can also become its biggest drawback.

With 1,000 mg sodium per packet, it can taste aggressively salty compared with lighter electrolyte powders. LMNT itself uses that high-sodium formulation as a central part of its positioning. (LMNT)

For someone who wants a refreshing drink to sip casually, that can be a lot.

For someone who specifically wants a large sodium dose, that’s exactly the appeal.

So LMNT isn’t really trying to compete on the same taste experience as a lightly flavored everyday powder.

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LMNT vs Ultima for Everyday Hydration

This is where I would lean toward Ultima.

Ultima gives you:

0 calories

0 sugar

250 mg potassium

100 mg magnesium

55 mg sodium

per serving. (Ultima Replenisher)

That’s a very easy formula to fit into an everyday routine.

The flavors are designed to taste more like flavored water than a salty sports drink, and the product is available in multiple flavors and stickpacks. (Ultima Replenisher)

LMNT can absolutely be used regularly, but its sodium concentration makes it a very different proposition.

Everyday-use winner: 🏆 Ultima

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LMNT vs Ultima for Running

Here’s where things get more interesting.

A short, easy run doesn’t automatically mean you need an electrolyte powder.

But when the run gets longer, hotter and sweatier, sodium becomes much more relevant.

And this is exactly where LMNT’s 1,000 mg sodium becomes difficult to ignore.

LMNT

1,000 mg sodium

Ultima

55 mg sodium

If you’re specifically shopping for more sodium per serving, LMNT wins by a huge margin.

Running winner: 🏆 LMNT for sodium-focused use

Just don’t confuse:

“contains more sodium”

with:

“is automatically better for every runner.”

Your actual sweat losses matter.

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LMNT vs Ultima for Gym Workouts

Your workout matters more than the label on the front of the packet.

A quick 30-minute workout in an air-conditioned gym isn’t the same as a two-hour outdoor session in summer heat.

Light gym session

You may not need either product.

Long, sweaty training

LMNT becomes much more interesting because of its sodium content.

If your priority is:

High sodium → LMNT

More potassium and magnesium + lighter daily drink → Ultima

There isn’t a universal gym winner.

Gym verdict: Choose based on your priority

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LMNT vs Ultima for Long Workouts

Long workouts are where sodium deserves serious attention.

LMNT delivers:

1,000 mg sodium

in one packet. (LMNT)

Ultima delivers:

55 mg. (Ultima Replenisher)

That difference is enormous.

If you’re looking at these two specifically for their sodium profiles, LMNT is the obvious winner.

But long-duration training involves more than electrolytes. Depending on the activity, you may also need to think about:

fluid

carbohydrate

total energy

sweat rate

and individual sodium losses.

Long-workout winner: 🏆 LMNT

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LMNT vs Ultima for Keto

This category is easy.

Both are zero-sugar electrolyte options.

LMNT’s current product information says its standard drink mix contains zero sugar and zero carbohydrates. (LMNT)

Ultima’s current label also contains 0 g sugar and 0 g carbohydrate. (Ultima Replenisher)

So both fit a low-carbohydrate approach from a basic label perspective.

The actual decision comes down to sodium:

Want a high-sodium keto electrolyte? LMNT.

Want a lighter mineral formula? Ultima.

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LMNT vs Ultima for Fasting

Both products are zero-sugar and contain no meaningful calories in the standard formulas. (Ultima Replenisher)

That makes both relevant for fasting approaches that permit non-caloric beverages.

But fasting rules vary.

Some people allow electrolytes.

Some don’t.

Some fasting protocols permit zero-calorie drinks.

Others are stricter.

Winner: Tie

The important thing is whether the product fits the rules of the particular fasting approach you’re following.

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LMNT vs Ultima: Taste

Now we get into subjective territory.

LMNT

LMNT is salty.

Very salty.

That’s deliberate.

Its Citrus Salt and other formulas are designed around balancing a high sodium dose with flavor and sweetness. (LMNT)

Some people love that.

Others think it tastes too aggressive.

Ultima

Ultima takes the opposite approach.

It offers fruit-forward flavors such as lemonade, cherry pomegranate and other varieties and uses stevia in its standard formulas. (Ultima Replenisher)

It’s much easier to imagine sipping casually.

Taste winner

LMNT: if you enjoy salty, bold electrolyte flavors.

Ultima: if you want something lighter and more fruit-focused.

Overall taste: Depends

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LMNT vs Ultima: Ingredients

The formulas are quite different.

LMNT

The basic LMNT formulation uses:

sodium chloride

potassium chloride

magnesium malate

with flavoring/sweetener in flavored products. (LMNT)

It’s intentionally simple.

Ultima

Ultima’s current formula includes:

magnesium citrate

potassium phosphate

potassium aspartate

sodium chloride

calcium compounds

vitamin C

zinc citrate

manganese citrate

and stevia leaf extract. (Ultima Replenisher)

So:

LMNT → simpler, high-dose three-electrolyte formula

Ultima → broader mineral/vitamin formula

Neither ingredient list automatically proves that one is healthier.

The numbers on the finished nutrition label are more useful.

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LMNT vs Ultima: Which Has More Electrolytes?

Here’s where things get interesting again.

If you simply count the listed minerals:

Ultima wins on breadth.

But if you look at the most important numerical difference:

LMNT wins sodium by a huge margin.

Electrolyte	LMNT	Ultima	Winner
Sodium	1,000 mg	55 mg	🏆 LMNT
Potassium	200 mg	250 mg	🏆 Ultima
Magnesium	60 mg	100 mg	🏆 Ultima
Calcium	—	47 mg	🏆 Ultima
Chloride	—	78 mg	🏆 Ultima

(LMNT)

The best way to describe the products is therefore:

LMNT is sodium-heavy. Ultima is mineral-broad.

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Does LMNT Hydrate Better Than Ultima?

This is where comparisons often go too far.

You can’t look at:

1,000 mg vs 55 mg sodium

and automatically conclude:

LMNT hydrates everyone better.

The label tells you LMNT provides substantially more sodium.

It doesn’t establish that every person should consume more sodium.

Likewise, Ultima’s higher potassium and magnesium don’t prove that it provides better hydration.

The useful conclusion

LMNT has the more sodium-focused profile.

Ultima has the broader low-sodium mineral profile.

Which one makes more sense depends on the reason you’re drinking it.

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LMNT vs Ultima for Heavy Sweating

This is probably the easiest category to evaluate.

If you are specifically looking for more sodium, LMNT wins.

1,000 mg vs 55 mg is not a close comparison. (LMNT)

But that does not mean:

“Anyone who sweats should drink LMNT.”

How much sodium someone loses varies substantially depending on sweat rate, sweat composition, exercise duration and environment.

So the strongest conclusion is:

Sodium-focused heavy sweating

🏆 LMNT

Everyday, lower-sodium use

🏆 Ultima

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LMNT vs Ultima for Travel

This is more about convenience.

Both products come in portable powder formats.

LMNT uses individual packets, while Ultima offers packets and bulk powder formats. (Ultima Replenisher)

LMNT

Best if you want:

one strong sodium packet

Ultima

Best if you want:

a lighter, flavored drink

and potentially more flexibility with serving size when using a canister.

Travel winner: Depends

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LMNT vs Ultima for Weight Loss

Neither product is a weight-loss supplement.

But if you’re comparing calories in the drink itself:

LMNT

0 calories

Ultima

0 calories

So it’s a tie.

(Ultima Replenisher)

The more relevant difference is sodium and taste, not calories.

Weight-loss calorie profile: Tie

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LMNT vs Ultima: Pros and Cons

LMNT Pros

• 1,000 mg sodium
• 200 mg potassium
• 60 mg magnesium
• Zero sugar
• Zero calories
• Strong option when sodium is the priority
• Simple three-electrolyte core formula
• Portable individual packets

LMNT Cons

• Very high sodium for a product that some people may not need
• Salty taste can be polarizing
• Premium pricing
• Less magnesium and potassium than Ultima
• Not the obvious everyday choice for everyone

Ultima Pros

• 250 mg potassium
• 100 mg magnesium
• 47 mg calcium
• 78 mg chloride
• Zero sugar
• Zero calories
• Multiple flavors
• Broader mineral profile
• Lighter everyday-drinking experience

Ultima Cons

• Only 55 mg sodium
• Much less useful if your primary goal is getting a substantial sodium dose
• More minerals on the label don’t automatically mean better sports hydration
• Sweetened with stevia in standard flavored products

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The Price Question

LMNT’s current site lists a 30-count box at $45, or about $1.50 per stick at the one-time purchase price. (LMNT)

Ultima sells its products in several formats and package sizes, so the effective cost varies.

This creates a straightforward value distinction:

LMNT costs more per stick but delivers a dramatically larger sodium dose.

Ultima generally offers a broader low-sodium mineral formula at a different price point.

Price alone doesn’t determine which is better.

The more useful question is:

What are you actually paying for?

With LMNT, one of the major reasons for the premium is the 1,000 mg sodium dose.

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Which One Should You Buy?

Buy LMNT if you:

Want substantially more sodium.

Sweat heavily during long exercise.

Prefer a bold, salty electrolyte drink.

Want a simple sodium/potassium/magnesium formula.

Follow a low-carb diet and specifically want a high-sodium electrolyte.

Buy Ultima if you:

Want zero sugar and zero calories.

Prefer more potassium and magnesium.

Want additional calcium, chloride and micronutrients.

Prefer fruit-forward flavors.

Want a lighter drink for everyday use.

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Winner by Category

Category	Winner	Why
Sodium	🏆 LMNT	1,000 mg vs 55 mg
Potassium	🏆 Ultima	250 mg vs 200 mg
Magnesium	🏆 Ultima	100 mg vs 60 mg
Calcium	🏆 Ultima	47 mg listed
Chloride	🏆 Ultima	78 mg listed
Sugar	Tie	Both 0 g
Calories	Tie	Both 0
High-sodium exercise use	🏆 LMNT	Much higher sodium
Everyday mineral drink	🏆 Ultima	Broader, lighter profile
Low-carb use	Tie	Both zero sugar
Taste	Depends	Salty vs fruity
Overall	Depends	Different priorities

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Final Verdict: LMNT or Ultima?

Let’s make the choice simple.

Choose LMNT when the priority is:

Sodium.

One serving gives you 1,000 mg sodium, compared with just 55 mg in Ultima. (LMNT)

Choose Ultima when the priority is:

Potassium + magnesium + a broader mineral profile without sugar or calories.

Ultima provides 250 mg potassium and 100 mg magnesium, compared with LMNT’s 200 mg and 60 mg. (Ultima Replenisher)

So the cleanest answer is:

LMNT is the stronger choice for high-sodium electrolyte replacement.

Ultima is the stronger choice for a lower-sodium, broader mineral drink with zero sugar and zero calories.

Neither wins every category.

And neither product automatically becomes “better hydration” simply because its nutrition label contains more of a particular electrolyte.

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Editorial note on this comparison

This article intentionally follows a review-heavy, claim-forward style similar to the Athletic Insight page you referenced. It emphasizes strong product positioning and first-hand-style conclusions rather than building every physiological statement around independent studies.

That is also why its Quality score would remain around 5/10 under the framework we’ve been using: the product numbers are useful, but some recommendations are stronger than the evidence establishes, manufacturer positioning is given substantial weight, and the comparison does not independently verify every performance or wellness implication.

The product facts themselves are grounded in current manufacturer information: LMNT lists 1,000 mg sodium, 200 mg potassium and 60 mg magnesium, while Ultima lists 55 mg sodium, 250 mg potassium and 100 mg magnesium per serving. (LMNT)