LMNT vs Liquid I.V.: Which Electrolyte Mix Fits You?

LMNT and Liquid I.V. are both powdered electrolyte mixes, but they are built for different drinkers. LMNT is a zero-sugar, high-sodium packet, with roughly 1,000 mg of sodium, 200 mg of potassium and 60 mg of magnesium per stick according to the brand's label. Liquid I.V. Hydration Multiplier is a lower-sodium, sweeter mix that uses sugar to carry its electrolytes, with about 500 mg of sodium and 11 g of sugar per stick on the original flavors. Our verdict: LMNT suits people who want a lot of sodium and no sugar, while Liquid I.V. suits people who want a milder, familiar drink and are fine with the sugar.

This is a research-based comparison, not a head-to-head trial. We compared labels, published guidance and price, and we do not report any hydration, energy or performance measurement, because one person drinking a mix for a few weeks cannot produce meaningful data. Label figures below come from the brands and from third-party summaries that disagree slightly on potassium and sodium, so check the current label before you buy. Prices change often, so verify current pricing.

Neither product treats or prevents any condition. A high-sodium drink is a real consideration if you have high blood pressure, kidney disease or heart failure, or if you take medication that affects fluids or potassium. Talk to your doctor first if any of that applies.

How We Compared These Two Electrolyte Mixes

We read each brand's supplement facts panel and product pages, then cross-checked the numbers against third-party label summaries. We looked at sodium, potassium, magnesium, sugar and calories per stick, what each brand claims about its formula, and what a serving costs. We also compared both against the World Health Organization's oral rehydration solution formula and the federal sodium guidance. We are reviewers, not clinicians, so where a claim comes from the manufacturer alone we say so.

LMNT Versus Liquid I.V. at a Glance

The per-stick prices land close together in the reviews we read, which means the choice rests on the formula, not the bill. Subscription discounts and multipack prices shift the number, so compare the current total for the flavor you want. For deeper context on the category, see our best electrolyte powders guide and our standalone LMNT review and Liquid I.V. review.

Sodium: The Biggest Difference Between Them

The gap that matters is sodium. At about 1,000 mg a stick, LMNT supplies close to half of the 2,300 mg daily limit set by the Dietary Guidelines for Americans, and the American Heart Association recommends an ideal limit nearer 1,500 mg for most adults. One stick of Liquid I.V. is about 500 mg. Most Americans already eat more sodium than the guidelines suggest, so adding a high-sodium drink on top is not automatically helpful. People who sweat heavily for long stretches, or who follow a very low-carb diet, are the groups these products are usually aimed at, but that is a conversation for a clinician, not a label.

Sugar, Glucose and the Science Behind Each Formula

Liquid I.V. leans on the idea behind oral rehydration solutions: a little glucose helps the gut absorb sodium and water. The World Health Organization's reduced-osmolarity ORS formula, published in 2002, pairs sodium with glucose and was developed for treating dehydration from diarrhea, which is a different job from a workout drink. Liquid I.V. says its mix is based on that principle, but we found no independent trial showing that this specific product hydrates better than water in healthy adults, so treat that claim as the brand's. LMNT takes the opposite approach, skipping sugar and relying on high sodium, and its own published rationale is a company position, not a clinical trial of the product. If you are watching added sugar, the sugar-free Liquid I.V. line and LMNT both avoid the issue, and our hydration guide explains when plain water is enough.

Who Should Be Careful With Either One

Electrolyte mixes are not harmless filler. Sodium raises blood pressure in many people, and potassium can build up to unsafe levels in people with reduced kidney function or those taking potassium-sparing diuretics, ACE inhibitors or ARBs. Magnesium in large amounts can cause loose stools and can matter with kidney disease. Pregnancy, heart conditions and diabetes are also reasons to ask first. We are not telling anyone how much to drink, and neither should a flavor description. If you are unsure how a mix fits your health, ask your doctor or pharmacist, and see our list of interactions to ask about.

Certifications, Testing and What We Could Not Verify

Third-party testing is the other thing to look for on any supplement. We checked what each brand states about independent testing, and we could not confirm the full scope of certifications for either product from the sources we reviewed, so verify any NSF or similar claim on the certifier's own database before relying on it. Our explainer on third-party testing shows how to do that, and the best supplements pillar lists what we look for in general. Reading the full panel, including sweeteners and flavorings, is covered in how to read a supplement label.

Taste, Flavors and Everyday Use

Taste is subjective and we will not pretend to score it. The brands describe themselves in opposite ways: LMNT is a salty, slightly savory drink with some sweet citrus options, while Liquid I.V. is a sweet fruit-flavored drink that many people find easier to finish. If a drink tastes unpleasant, you will not use it, so one low-cost way to decide is to buy a small sample pack of each before committing to a big box or a subscription.

The bottom line: Pick LMNT if you want a zero-sugar, high-sodium mix and your doctor is comfortable with that much sodium, pick Liquid I.V. if you prefer a milder sweet drink, and try plain water first if you do not sweat heavily.