LMNT and Nuun are both popular electrolyte brands, but comparing them head-to-head is a bit like comparing a firehose to a garden sprinkler. LMNT is a high-sodium powder (1,000mg per stick pack, $1.50/serving) designed for heavy sweaters, keto dieters, and endurance athletes. Nuun Sport is a low-sodium effervescent tablet (300mg per tablet, $0.52/serving) designed for everyday hydration and moderate exercise.
The quick answer: if you sweat heavily, eat low-carb, or exercise intensely for 60+ minutes, LMNT gives you 3.3x more sodium per serving. If you want a light daily electrolyte boost at a fraction of the cost, Nuun does the job for about a third of the price. Neither product is objectively "better." They serve different needs, and the right choice depends entirely on your sodium requirements and budget.
LMNT vs Nuun: The Numbers Side by Side
The data tells the story faster than any paragraph can. LMNT is a stick pack powder; Nuun Sport is an effervescent tablet. The sodium gap is the headline: 1,000mg vs. 300mg.
| Metric | LMNT | Nuun Sport | Difference |
|---|---|---|---|
| Sodium | 1,000mg | 300mg | LMNT has 3.3x more |
| Potassium | 200mg | 150mg | LMNT has 1.3x more |
| Magnesium | 60mg | 25mg | LMNT has 2.4x more |
| Sugar | 0g | 1g | LMNT is zero sugar |
| Sweetener | Stevia | Stevia | Same |
| Form | Stick Pack (powder) | Tablet (effervescent) | Different formats |
| Price/serving | $1.50 | $0.52 | Nuun is 65% cheaper |
| $/g sodium | $1.50 | $1.73 | LMNT is 13% cheaper per g |
| Servings/box | 30 | 40 | Nuun has more servings |
| Box price | $45.00 | $20.98 | Nuun is less than half |
Data verified against manufacturer websites. Prices as of March 2026. See the full 17-brand comparison →
One number worth highlighting: the cost per gram of sodium. LMNT costs $1.50/g and Nuun costs $1.73/g. Despite LMNT's higher sticker price, you actually get more sodium per dollar. That math matters if high sodium intake is your goal.
Where LMNT Wins
Sodium content (1,000mg vs. 300mg). This is the most significant difference between the two products. LMNT delivers more than three times the sodium per serving. Research on endurance athletes supports sodium intake of 500-1,150mg per liter during intense exercise to maintain performance and prevent hyponatremia.[1] One LMNT packet in 16-32 oz of water hits this range. With Nuun, you'd need 2-3 tablets to approach similar sodium levels.
Cost per gram of sodium ($1.50 vs. $1.73). LMNT's per-serving price is nearly triple Nuun's. But if you're buying electrolytes specifically for sodium, LMNT delivers more sodium per dollar. An athlete using three Nuun tablets to match LMNT's sodium would spend $1.56 and still only reach 900mg.
Magnesium (60mg vs. 25mg). LMNT provides 2.4x more magnesium per serving. The form matters too. Nuun uses magnesium oxide, which has only about 4% bioavailability according to research comparing commercial magnesium preparations.[2] That means the body may absorb roughly 1mg of Nuun's 25mg magnesium oxide. LMNT's 60mg of magnesium (as magnesium malate) is both a larger dose and a more bioavailable form.
Instant mixing. LMNT's powder dissolves in seconds when stirred or shaken. Nuun's effervescent tablet takes 2-4 minutes to fully dissolve and leaves a fizzy, sometimes chalky residue. At a trailhead or mid-workout, that wait adds up.
Zero sugar. LMNT contains 0g sugar. Nuun Sport has 1g. The difference is minimal, but for strict keto or fasting protocols, zero is zero.
Where Nuun Wins
Price per serving ($0.52 vs. $1.50). Nuun costs roughly a third of what LMNT costs per serving. Over a month of daily use, that's $15.60 for Nuun vs. $45.00 for LMNT. For people who want a daily electrolyte habit without spending $540/year, Nuun's pricing is hard to beat.
Appropriate sodium for daily use. Not everyone needs 1,000mg of sodium in a single drink. For moderate activity, desk work, or people eating a standard diet, 300mg is a reasonable daily supplement. Using LMNT on rest days can lead to excessive sodium intake, and some users report constant thirst and water retention.
Portability. Nuun tablets come in a compact tube that fits in a jersey pocket, gym bag, or carry-on without any spill risk. LMNT stick packs are light, but the powder can spill if a packet tears. For travel and on-the-go use, tablets win.
Product line variety. Nuun offers Sport, Vitamins, Immunity, and Rest product lines, each formulated for different purposes. LMNT sells one core electrolyte formula across its flavor range. If you want a before-bed magnesium blend and a daytime electrolyte from the same brand, Nuun covers both.
Total box cost ($20.98 vs. $45.00). Nuun's lower upfront price makes it an easier first purchase. Spending $21 to try a product is a different commitment than $45, especially when you're not sure which flavors you'll like.
Powder vs. Tablet: Does Format Matter?
More than most people realize, yes. The format difference between LMNT and Nuun affects how and when you can use each product.
LMNT's powder dissolves immediately in water. Tear the packet, dump it in, shake or stir, and drink. No waiting. Nuun's effervescent tablet needs 2-4 minutes to dissolve and produces carbonation as it breaks down. That carbonation is fine for sipping at a desk, but some athletes report mild bloating from the fizz during exercise.
Research on effervescent delivery suggests that Nuun tablets do effectively improve fluid balance compared to plain water.[3] The tablet format doesn't reduce the electrolyte absorption itself. The concern is the carbonation's effect on comfort during physical activity.
There's also the "doubling up" problem. Athletes who find Nuun's 300mg sodium insufficient often drop two tablets in one bottle. This doubles the cost to $1.04/serving, doubles the carbonation, and still only delivers 600mg sodium. At that point, a single LMNT packet ($1.50) provides 1,000mg sodium with no fizz. The math favors LMNT once you need more than one Nuun tablet per bottle.
Who Should Choose LMNT
LMNT makes sense if you fall into one of these categories:
- Heavy sweaters and endurance athletes. Running, cycling, or training for 60+ minutes in heat. Research shows salt supplementation during endurance events can improve performance and reduce body mass loss.[4]
- Keto, carnivore, and low-carb dieters. Carbohydrate restriction increases renal sodium excretion. Most low-carb protocols recommend supplementing additional sodium to compensate.[1]
- People doing intermittent fasting. Fasting accelerates sodium loss through urine. LMNT's zero-calorie, zero-sugar formula won't break a fast.
- Anyone who has experienced exercise-related cramping. While cramping has multiple causes, inadequate sodium is one of the most common and correctable.
If the saltiness is too intense, start with half a packet in 32 oz of water and increase from there. Many users report adjusting to the flavor within a week.
Who Should Choose Nuun
Nuun makes sense for a different set of needs:
- Moderate exercisers. Gym sessions, yoga, walks, and runs under 60 minutes. At these intensities, 300mg sodium per serving is appropriate for most people.
- Daily hydration. Desk workers and anyone wanting a light electrolyte boost throughout the day without loading up on sodium.
- Budget-conscious users. At $0.52/serving, Nuun is one of the most affordable electrolyte products on the market. Over a year of daily use, you'd spend $190 on Nuun vs. $548 on LMNT.
- Travelers. Tablet tubes are compact, lightweight, and spill-proof. TSA-friendly without any powder-related concerns.
- People sensitive to salty flavors. Nuun's 300mg sodium creates a much lighter-tasting drink than LMNT's 1,000mg. For people who find salty drinks unpleasant, this matters.
For intense or prolonged exercise, consider using two tablets per bottle. Just be aware that doubling up brings the cost to $1.04/serving with 600mg sodium and more carbonation.
What About Brand Ownership and Recent News?
Two things worth knowing about these brands. Nuun is now owned by Nestle S.A. If supporting independent brands matters to you, Nuun no longer qualifies. LMNT remains independently owned.
On the LMNT side, a 2025 class action lawsuit alleged that LMNT packets contain up to 550mg of maltodextrin, roughly 100x what was initially disclosed. The lawsuit claimed the products were falsely advertised as "All Natural" and "Paleo-Keto Friendly." Co-founder Robb Wolf acknowledged the discrepancy. For strict keto followers, this may affect trust in the brand's labeling accuracy.
Neither issue changes the core electrolyte data. LMNT still delivers 1,000mg sodium per packet, and Nuun still delivers 300mg per tablet. But brand transparency matters to many consumers, and both companies have baggage worth knowing about.
The Bottom Line
LMNT and Nuun are not competitors in any meaningful sense. They're different products for different situations. LMNT is a high-dose sodium supplement at $1.50/serving for people who need serious electrolyte replenishment. Nuun is a light, affordable electrolyte tablet at $0.52/serving for everyday hydration and moderate activity.
The smartest approach might be owning both. Use Nuun on easy days and at your desk ($0.52). Use LMNT before and during intense workouts or in the heat ($1.50). Your monthly cost stays lower than using LMNT daily, and you're matching your sodium intake to your actual needs.
For a full breakdown of how LMNT and Nuun compare against 15 other electrolyte brands, see our complete 17-brand comparison table.
References
- Vitale K, Getzin A. "Nutrition and Supplement Update for the Endurance Athlete: Review and Recommendations." Nutrients, 2022; 14(7):1318. pmc.ncbi.nlm.nih.gov
- Firoz M, Graber M. "Bioavailability of US commercial magnesium preparations." Magnesium Research, 2001; 14(4):257-62. pubmed.ncbi.nlm.nih.gov
- Pence J, Bloomer RJ. "Impact of Nuun Electrolyte Tablets on Fluid Balance in Active Men and Women." Nutrients, 2020; 12(10):3030. pmc.ncbi.nlm.nih.gov
- Del Coso J, et al. "Effects of oral salt supplementation on physical performance during a half-ironman: A randomized controlled trial." Scandinavian Journal of Medicine & Science in Sports, 2016; 26(2):156-64. pubmed.ncbi.nlm.nih.gov