Last updated: April 2026 | Research by Evident Health
LMNT and Liquid IV are the two most recognized electrolyte brands in America. LMNT built its following through podcast sponsorships and the keto community. Liquid IV built its through retail ubiquity and a billion-dollar Unilever acquisition. Between them, they dominate the conversation around hydration supplements -- which means millions of people are choosing between these two products without realizing that neither one ranks in our top eight.
That does not mean they are bad products. It means the comparison is more nuanced than most reviews suggest, and the right choice depends entirely on what you are optimizing for.
Quick Verdict
LMNT scores 5.0/10 in our comprehensive electrolyte rankings. Liquid IV scores 4.7/10. Both land squarely in the middle of the 57 products we evaluated -- better than the bottom-tier brands with proprietary blends and artificial colors, but meaningfully behind the top performers on ingredient quality, testing transparency, and formulation purity.
Choose LMNT if you want zero sugar, high sodium, and a product aligned with keto, fasting, or low-carb lifestyles. Its 1,000mg sodium is the highest in the category, and the magnesium malate is a genuinely bioavailable form.
Choose Liquid IV if you want a mainstream, widely available option and do not mind 11g of sugar per serving. The Cellular Transport Technology formulation is grounded in real science, and the potassium content is notably higher than LMNT's.
Consider neither if ingredient transparency and third-party testing matter to you. Products like Needed, LyteShow, NormaLyte, and Skratch Labs outperform both on the metrics that matter most for long-term trust.
Side-by-Side Comparison
Full individual breakdowns: LMNT review | Liquid IV review
Electrolyte Profile: What You Are Actually Getting
The most important difference between these two products is not sugar -- it is what they prioritize in the electrolyte profile itself.
Sodium
LMNT delivers 1,000mg of sodium per serving, the highest of any product in our 57-product analysis. This is not a marketing gimmick. The brand was co-founded by Robb Wolf, whose work in the paleo and keto communities centered on the argument that most people -- especially those eating low-carb -- are chronically under-consuming sodium. Whether you agree with that thesis or not, 1,000mg is a serious dose that can meaningfully replace sweat losses from heavy exercise or address the sodium depletion common in ketogenic diets.
Liquid IV provides 500mg, which is adequate for general hydration and moderate activity. It is roughly what you lose in 30-60 minutes of moderate exercise, depending on your sweat rate. For most people doing standard daily activities, 500mg per serving is sufficient.
Potassium
Liquid IV wins here. Its 370mg of potassium nearly doubles LMNT's 200mg. Since most Americans consume only about 50-60% of the recommended daily potassium intake (2,600-3,400mg), the difference is meaningful. Potassium works in direct partnership with sodium to regulate fluid balance -- you need both, and LMNT's ratio is heavily skewed toward sodium.
Magnesium
LMNT includes 60mg of magnesium malate. Liquid IV includes none.
This is a significant gap. Magnesium is involved in over 300 enzymatic reactions in the body, and an estimated 50% of Americans are not meeting the recommended daily intake (310-420mg). Magnesium malate specifically is one of the more bioavailable forms, with absorption rates around 30-40% -- far better than the magnesium oxide (4-15% bioavailability) found in many cheaper products.
Liquid IV's complete omission of magnesium is one of its most notable formulation weaknesses. For a product positioned as a comprehensive hydration solution, leaving out the third most important electrolyte is a real gap.
Neither Includes Calcium
Both products skip calcium entirely. This is less concerning than the magnesium omission -- most people get adequate calcium from food -- but it does mean neither product offers a truly complete electrolyte profile. Products like Skratch Labs (50mg calcium citrate) and Redmond Re-Lyte (60mg calcium) include it without adding significant cost or complexity to the formula.
The Sugar Question
This is where the philosophical divide between these products runs deepest, and where most comparison articles get it wrong by oversimplifying.
Liquid IV's Case for Sugar
Liquid IV's 11g of sugar is not incidental. It is the functional core of the product's mechanism. The brand's "Cellular Transport Technology" is based on the sodium-glucose co-transport system -- a well-established biological pathway where glucose and sodium are absorbed together through the intestinal wall, pulling water along with them. This is the same science used in the World Health Organization's oral rehydration solutions, which have been saving lives from cholera and severe dehydration for decades.
The science is real. The question is whether you need it.
Clinical ORS solutions exist for a specific context: severe dehydration where rapid fluid absorption is medically necessary. For someone recovering from a stomach virus, managing POTS, or rehydrating after extreme fluid loss, the sodium-glucose co-transport mechanism provides a measurable advantage over water or sugar-free electrolytes.
For daily hydration? The evidence that healthy adults need sugar to absorb electrolytes is weak. Your body absorbs sodium, potassium, and magnesium through multiple pathways that do not require glucose. The sugar in Liquid IV improves the speed of absorption in controlled settings, but it does not make the electrolytes more effective for everyday use. What it does add is 45 calories per serving, a blood sugar spike, and -- at 11g per stick pack in a product weighing 16g total -- a composition that is approximately 69% sugar by weight.
That percentage is worth sitting with. If you eat two Liquid IV stick packs per day, you are consuming 22g of added sugar just from your electrolyte supplement, before accounting for anything else in your diet. The American Heart Association recommends no more than 25g of added sugar per day for women and 36g for men.
LMNT's Case Against Sugar
LMNT uses stevia leaf extract for sweetness and contains zero sugar and zero calories. For people following ketogenic, low-carb, or fasting protocols, this is a genuine advantage. Any sugar intake during a fast disrupts the metabolic state that fasting is designed to achieve. Even the 11g in Liquid IV would break a fast.
The tradeoff is taste. Sugar makes things taste good in a way that stevia does not replicate for everyone. LMNT has invested heavily in flavoring to compensate, and their flavored varieties are generally well-regarded. But stevia's slightly metallic aftertaste remains a turnoff for some users, particularly those coming from sugar-sweetened beverages.
The Honest Answer
If you need clinical-grade rehydration, medical ORS products like NormaLyte PURE and Trioral deliver the same sodium-glucose co-transport science at a fraction of Liquid IV's price ($0.30-$1.58/serving vs. $1.56) with cleaner formulations. If you want daily hydration without sugar, LMNT works -- but so do many cheaper alternatives. The sugar question is real, but it is also something of a distraction from the issues both products share.
Ingredient Quality: Where Both Fall Short
Natural Flavors
Both LMNT and Liquid IV contain "natural flavors." This puts them in the same 75% majority of electrolyte products that rely on this catch-all term. As we detailed in our investigation of natural flavors in the electrolyte category, the FDA's definition of "natural flavors" permits solvents, preservatives, emulsifiers, and processing aids -- none of which require individual disclosure on the label.
For LMNT, this is not a theoretical concern. Independent testing revealed that LMNT's flavored products contained 300-450mg of undisclosed maltodextrin per serving, hidden inside the "natural flavors" designation. That is more maltodextrin than the product's 200mg of potassium and 60mg of magnesium combined. A class action lawsuit filed in 2025 alleges false advertising of the product as "all natural" and "clean." The case remains in discovery as of early 2026.
Liquid IV has not faced the same public scandal, but the same opacity applies. When a product lists "natural flavors," you do not know what is in that formulation, regardless of the brand's marketing language.
Products that avoid this entirely -- Needed (real lemon oil and juice), Skratch Labs (actual fruit), LyteShow (completely unflavored) -- demonstrate that it is possible to make a good-tasting or effective electrolyte product without relying on a regulatory gray zone.
LMNT's Lead Issue
In late 2024, independent testing by Lead Safe Mama detected 27 parts per billion of lead in LMNT's Raw Unflavored variant. LMNT claims every lot undergoes third-party heavy metals testing, which creates a notable discrepancy between their stated quality assurance process and the independent result. The lead was found specifically in the unflavored version -- the flavored variants have not been independently tested by the same organization.
Liquid IV's Filler Ingredients
Liquid IV's ingredient list includes silicon dioxide (an anti-caking agent) and dextrose (a simple sugar). Neither is harmful in the amounts present, but both are filler ingredients that add nothing to the product's hydration function. Products in our top picks -- Needed, LyteShow, NormaLyte, Skratch Labs -- achieve their formulations without either.
Testing and Transparency: The Shared Blind Spot
Neither LMNT nor Liquid IV holds third-party testing certifications.
No NSF Certified for Sport. No Informed Sport. No ConsumerLab verification. No published Certificates of Analysis that consumers can review independently.
For the two biggest-selling electrolyte brands in America, this is a meaningful gap. Transparent Labs (Informed Sport certified, published COAs), BPN Electrolytes (NSF Certified for Sport), and Seeking Health (NSF Certified for Sport) all demonstrate that third-party verification is achievable in this category. The cost of certification is not prohibitive -- it is a choice, and both LMNT and Liquid IV have chosen not to make it.
This matters more for LMNT because the brand has built its identity around trust and ingredient purity. A brand that tells you to trust its ingredient list -- and then gets caught with undisclosed maltodextrin inside its "natural flavors" -- would benefit from independent verification more than most. The fact that it still does not have any external testing certification, even after the maltodextrin revelation and the lead findings, is worth noting.
For Liquid IV, the testing gap is less surprising. As a mass-market Unilever-owned brand, it has never positioned itself as a transparency leader. But the absence of testing still means consumers are trusting the brand's own claims without external validation.
Value: Nearly Identical, Very Different Products
LMNT costs $1.50 per serving. Liquid IV costs $1.56. The price difference is negligible -- six cents will not determine anyone's purchase decision.
What you get for that money, however, differs substantially:
For $1.50 (LMNT), you get 1,000mg sodium, 200mg potassium, 60mg magnesium malate, zero sugar, zero calories, stevia-sweetened, with natural flavors of uncertain composition and no third-party testing.
For $1.56 (Liquid IV), you get 500mg sodium, 370mg potassium, zero magnesium, 11g sugar, 45 calories, sugar + stevia sweetened, with natural flavors and no third-party testing.
Neither is a great value relative to the broader category. Redmond Re-Lyte delivers 810mg sodium, 400mg potassium, and 50mg dual-form magnesium for $0.77 per serving. Transparent Labs provides 500mg sodium with Informed Sport certification and TRAACS chelated minerals for $0.75. LyteShow -- the cleanest product in the category -- costs $0.50 per serving.
You are paying a premium for brand recognition with both LMNT and Liquid IV. That premium is not buying you better ingredients, more complete electrolyte profiles, or independently verified quality. It is buying you marketing, flavor development, and convenience of availability.
Who Should Choose Which
Choose LMNT If:
- You follow a ketogenic, low-carb, or carnivore diet and need zero-sugar, zero-calorie electrolytes
- You fast regularly and need electrolytes that will not break your fast
- You are a heavy sweater or athlete who needs aggressive sodium replacement (1,000mg per serving)
- You prioritize magnesium in your electrolyte supplement (Liquid IV has none)
- You have tried stevia-sweetened products before and tolerate the taste
Choose Liquid IV If:
- You want a mainstream, widely available electrolyte you can buy at any drugstore or grocery
- You prefer a sugar-sweetened taste and are not concerned about 11g of added sugar per serving
- You are recovering from illness, hangovers, or mild dehydration where rapid absorption matters
- You value higher potassium (370mg vs. 200mg) more than higher sodium
- Taste is your primary purchasing criterion -- sugar-sweetened products are generally more palatable than stevia-based ones
Choose Neither If:
- Ingredient transparency is a priority (both use natural flavors, neither has third-party testing)
- You want a complete electrolyte profile including magnesium and calcium
- You are looking for the best value per serving (both are nearly 2x the price of comparable products)
- You care about third-party certifications for sport or purity
- You want the cleanest possible formulation (the top products in the category beat both handily)
What We Would Recommend Instead
Based on our analysis of 57 electrolyte products, four alternatives outperform both LMNT and Liquid IV across the dimensions that matter most:
Needed Hydration Support (8.7/10, $1.53/serving) -- Perfect clean label, real lemon flavoring (not "natural flavors"), Clean Label Project certified, verified batch testing. Comparable price to both LMNT and Liquid IV but with no ingredient transparency gaps.
LyteShow (8.1/10, $0.50/serving) -- Five ingredients. Zero additives. The cleanest formulation in the category at one-third the cost of either LMNT or Liquid IV. Lower sodium than both, so not ideal for heavy sweaters, but unbeatable for daily maintenance hydration.
Skratch Labs Sport (8.0/10, $1.10/serving) -- Real fruit flavoring (actual lemon oil and lime juice), 400mg sodium, all four major electrolytes in citrate forms. Founded by an exercise physiologist, trusted by the endurance community. If you want a flavored product that does not hide behind "natural flavors," Skratch sets the standard.
Redmond Re-Lyte (7.5/10, $0.77/serving) -- 810mg sodium from ancient sea salt, 400mg potassium, dual-form bioavailable magnesium, at roughly half the price of LMNT. Still uses natural flavors (sourced from dehydrated fruit, which is more transparent than most), but the electrolyte profile and value are strong.
For a full comparison of all 57 products including these alternatives, see our interactive comparison table.
Frequently Asked Questions
Can I mix LMNT and Liquid IV together?
Technically yes, but there is no good reason to. Combined, you would be consuming 1,500mg of sodium and 11g of sugar in a single serving -- a very high sodium dose that exceeds what most people need at one time, plus the sugar you were presumably trying to avoid by choosing LMNT. If you want higher sodium with some sugar for taste, a better approach is choosing a single product with a balanced profile, like Skratch Labs (400mg sodium, 19g intentional fuel sugar) or Re-Lyte (810mg sodium, zero sugar).
Is Liquid IV's Cellular Transport Technology actually backed by science?
The sodium-glucose co-transport mechanism is well-established physiology. The WHO has used it in oral rehydration solutions since the 1970s, and it has saved millions of lives from dehydration caused by cholera and diarrheal disease. The question is not whether the science is real -- it is whether you need it. For severe dehydration, the glucose-mediated absorption pathway provides a measurable advantage. For everyday hydration in healthy adults, the benefit over sugar-free electrolytes dissolved in water is marginal. Clinical ORS products like NormaLyte and Trioral use the same science at a fraction of the price.
Does LMNT's maltodextrin issue mean the product is unsafe?
The maltodextrin found in LMNT's flavored products (300-450mg per serving) is not a safety concern in the traditional sense -- maltodextrin is a common food ingredient. The issue is transparency. A product marketed as zero-sugar and keto-friendly contained an undisclosed high-glycemic carbohydrate, and the brand initially denied its presence. For consumers who chose LMNT specifically because of its clean-label claims, the betrayal is about trust, not toxicity. The class action lawsuit reflects that distinction.
Is Liquid IV worth it if I can buy Pedialyte cheaper?
Liquid IV has a meaningfully better formulation than Pedialyte, which contains artificial sweeteners (sucralose and acesulfame potassium), artificial colors, and maltodextrin filler. However, if pure rehydration efficacy per dollar is what you want, Trioral ($0.30/serving) delivers the WHO-formula ORS standard at roughly one-fifth the cost of either product. Pedialyte's brand recognition significantly exceeds its formulation quality.
Which is better for hangovers?
Alcohol is a diuretic that depletes sodium, potassium, and magnesium. LMNT's higher sodium and inclusion of magnesium make it the technically better choice for hangover recovery between these two. That said, the most effective hangover electrolyte strategy is to take electrolytes before and during alcohol consumption, not just the morning after. Any product with adequate sodium (300mg+) and magnesium will help. The NormaLyte PURE or Trioral medical-grade ORS formulas are the most effective options for serious rehydration after heavy fluid loss.
Evident Health is an independent review organization. We do not accept payment from brands for placement or scores. For our complete methodology, scoring framework, and individual product reviews, see our electrolyte review hub. Product data for all 57 products is available in our comparison table.
