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LMNT and Liquid IV are two of the most popular electrolyte drinks on the market right now, and if you’ve been trying to figure out which one is actually worth buying, or whether you need either of them at all, you’re in the right place.
As a Registered Dietitian, my honest take is that both can have their place depending on who you are and how you’re using them. The differences between the two are more meaningful than most people realize, and one of them has some marketing claims worth addressing directly.
In this post I’ll break down what’s actually in each product, how they compare on sodium, sugar, and ingredients, who each one is actually right for, and whether you need an electrolyte drink at all.
What Are Electrolytes?
Electrolytes are essential minerals that your body needs to function properly. They support nerve and muscle function, help maintain your body’s acid-base balance, and play a key role in keeping you hydrated.
The main electrolytes in your body are sodium, potassium, chloride, calcium, magnesium, phosphate, and bicarbonate. When you sweat, you lose some of these minerals, which is where electrolyte drinks come in.
Do You Really Need An Electrolyte Drink?
Here is something worth knowing upfront: electrolytes do not directly hydrate you. They support your body’s ability to stay hydrated and rehydrate when needed, but plain water handles most everyday hydration just fine.
For most people eating a reasonably balanced diet, there are enough electrolytes in food and drinks to cover daily needs. You probably don’t need a supplement.
Where electrolyte drinks genuinely earn their place is when you are losing more electrolytes than usual, including:
- Intense or prolonged exercise, especially in heat or humidity
- Working or spending extended time outdoors in hot weather
- Being sick and losing fluids through vomiting or diarrhea
- People with specific medical conditions like POTS that require higher sodium intake
If you are a recreational exerciser who works out for 30 to 60 minutes a few times a week, water is almost certainly enough. The people who benefit most from products like LMNT and Liquid IV are endurance athletes, heavy sweaters, or anyone dealing with significant fluid loss.
What To Look For In An Electrolyte Drink
Before comparing specific products, here is what actually matters when choosing an electrolyte drink:
- Sodium and potassium content. These are the two most important electrolytes to replace when you are sweating. Sodium helps regulate fluid balance and is the primary electrolyte lost in sweat. Potassium works alongside sodium to maintain cellular hydration. Look for a product that includes meaningful amounts of both.
- Magnesium. Often overlooked but worth paying attention to. Magnesium supports muscle function and can help with cramping, which is a common complaint during intense exercise.
- Sugar content. Sugar is not automatically bad in an electrolyte drink. If you are doing intense exercise lasting more than an hour, a small amount of sugar can actually help your body absorb electrolytes and water more quickly. If you are using an electrolyte drink for everyday hydration or light activity, a sugar-free option is probably the better choice.
- Sodium amount relative to your needs This is the one most people overlook. A drink with 1,000mg of sodium per serving is very different from one with 500mg. For intense athletes losing significant sodium through sweat, the higher amount may be appropriate. For most people using an electrolyte drink casually, that much sodium is more than necessary and adds up quickly against your daily recommended limit of 2,300mg.
What is LMNT?
LMNT is a sugar-free electrolyte drink mix developed by Robb Wolf, a former research biochemist. It comes in individual stick packets designed to dissolve in water and was formulated with high sodium athletes and intense exercisers in mind, which explains its distinctive nutritional profile.
Each packet contains 1,000mg of sodium, 200mg of potassium, and 60mg of magnesium, with zero sugar. The sweetness comes from stevia and the ingredient list is short and clean. LMNT also now offers a sparkling ready-to-drink can version in addition to the original stick packets.
What is Liquid IV?
Liquid IV is an electrolyte drink mix based on the World Health Organization’s oral rehydration solution framework. It uses what the company calls “Cellular Transport Technology”, which combines sodium, glucose, and potassium to enhance water absorption in the body. The science behind this is legitimate, sodium and glucose together do help the intestines absorb water more efficiently.
The original Liquid IV Hydration Multiplier contains 500mg of sodium, 380mg of potassium, 11 grams of sugar, and 45 calories per serving. It also includes vitamins C, B3, B5, B6, and B12. The sugar is intentional, it works alongside the sodium to improve absorption, which makes it particularly useful during or after intense exercise.
Liquid IV also now offers a sugar-free version sweetened with allulose, which has similar electrolyte levels but zero grams of added sugar. Their product line has also expanded to include versions with immune support, energy, sleep support, and a kids formulation.
How Do The Ingredients Compare?
| Nutrients | Liquid IV | Liquid IV Sugar-Free | LMNT |
|---|---|---|---|
| Sodium | 500mg | 530mg | 1,000mg |
| Potassium | 380mg | 380mg | 200mg |
| Magnesium | 0mg | 0mg | 60mg |
| Sugar | 11g | 0g | 0g |
| Calories | 45 | 10 | 5 |
| Sweetener | Cane sugar, stevia | Allulose | Stevia |
| Vitamins | C, B3, B5, B6, B12 | C, B3, B5, B6, B12 | None |
| Cost per serving | ~$1.50 | ~$1.86 | ~$1.50 |
The most striking difference is sodium. LMNT has 1,000mg per serving, which is double the sodium of either Liquid IV option. For context, that’s 43% of the FDA’s recommended daily limit of 2,300mg in a single packet. For most people who are not endurance athletes or heavy sweaters, that’s more sodium than they need from a single drink.
Liquid IV’s sodium to potassium ratio is more balanced, with roughly equal amounts of each, which better reflects everyday hydration needs for the average person.
The other key difference is sugar. Original Liquid IV has 11 grams of added sugar per serving. As mentioned this is intentional since sugar helps the body absorb sodium and water more efficiently, but it is worth knowing if you are watching your sugar intake. The sugar free version eliminates this concern.
LMNT’s advantage is its clean ingredient list, zero sugar, zero artificial ingredients, and the addition of magnesium which neither Liquid IV version includes.
What About Taste?
Both LMNT and Liquid IV come in a variety of flavors and both have a slightly salty taste due to their sodium content. LMNT’s saltiness is more noticeable given its 1,000mg of sodium per serving, which some people love and others find too intense.
Personally I prefer the Liquid IV flavors overall, but taste is genuinely subjective here and both have plenty of fans. LMNT also offers a raw unflavored option if you want something basic that you can add to any drink.
LMNT currently offers around 14 flavors including a sparkling can version. Liquid IV has around 19 flavors across their product lines, giving you more variety to choose from.
Let’s Talk About Sodium
The recommendation for adults in the US is less than 2,300mg of sodium per day, and most of us are already well over that from food alone. Both LMNT and Liquid IV contain meaningful amounts of sodium, but the difference between them is significant and worth understanding.
How the sodium compares:
- LMNT: 1,000mg per serving, which is 43% of the daily recommended limit before you have eaten anything
- Liquid IV original: 500mg per serving, a more moderate amount
- Liquid IV sugar-free: 530mg per serving, similar to the original
Who should be cautious with high sodium electrolyte drinks:
- Anyone already eating a higher sodium diet
- People with high blood pressure or a family history of heart disease
- Anyone using it casually for everyday hydration rather than intense exercise
Who benefits most from higher sodium electrolytes:
- Endurance athletes losing significant sodium through sweat
- People with specific medical conditions like POTS that require higher sodium intake
- Anyone doing prolonged intense exercise in heat or humidity
LMNT’s sodium marketing is worth addressing directly. Right on their homepage they promote a “more salt, not less” philosophy and claim the science-backed recommendation is 4,000 to 6,000mg of sodium daily. Their primary source for this is a single study from 2011. There is a much larger body of more recent research that supports the current 2,300mg recommendation, particularly for people with or at risk for high blood pressure.
There is also a 2025 lawsuit worth knowing about. LMNT faced a proposed class action lawsuit alleging they falsely advertise their products as keto and paleo friendly, despite containing maltodextrin in their natural flavors. LMNT maintains that the maltodextrin is present only in trace amounts within the natural flavoring. The lawsuit is ongoing.
Cost Comparison
All three options are similarly priced per serving, though the sugar-free Liquid IV runs slightly higher.
- LMNT: $45 for 30 packets, about $1.50 per serving
- Liquid IV original: $24.99 for 16 packets, about $1.56 per serving
- Liquid IV sugar-free: approximately $1.86 per serving
All three are available on Amazon and at most major retailers. Subscribing for regular deliveries brings the cost down on both LMNT and Liquid IV, so if you find one you like it is worth looking into the subscription option.
Prices vary by retailer and are subject to change so always check the current price before purchasing.
Do You Actually Need One?
For most people who aren’t exercising regularly or are only doing light exercise, the honest answer is no. Water and a balanced diet cover your hydration needs just fine and you don’t need to spend money on an electrolyte supplement to stay hydrated.
Where electrolyte drinks genuinely earn their place is if you are:
- Working out vigorously or for longer than an hour
- Sweating heavily from exercise or heat exposure
- Sick and losing fluids through vomiting or diarrhea
- Dealing with a condition that requires higher sodium intake like POTS
If any of those apply to you, both LMNT and Liquid IV are solid options. They aren’t miracle drinks but they’re a helpful tool when used in the right context.
And if you just enjoy them and find they help you drink more water overall, that is a perfectly reasonable reason to use them too. Just be mindful of the sodium and factor it into your daily intake, especially with LMNT. If you’re using it casually, I’d recommend sticking to Liquid IV’s lower sodium formulation.
Frequently Asked Questions
It depends on who you are and how you’re using it. For most people, Liquid IV is the more practical everyday choice because of its lower sodium content and added vitamins. LMNT makes more sense if you have very high sodium needs or you’re an athlete losing exceptional amounts of sodium through sweat. If you want zero sugar, both have sugar-free options worth considering.
For most people who aren’t endurance athletes or heavy sweaters, yes. At 1,000mg of sodium per serving, one packet accounts for 43% of the FDA’s recommended daily limit before you’ve eaten anything. If you’re already getting plenty of sodium from food, which most Americans are, LMNT adds significantly to that total. It can be a good product for the right person but it isn’t designed for casual everyday hydration.
Liquid IV can be a helpful hydration tool in the right context, particularly after intense exercise or when you’re sick and losing fluids. The original version contains 11 grams of added sugar which is worth knowing if you’re watching your intake. The sugar-free version is a solid alternative. For everyday hydration when you’re not exercising intensely, plain water is still your best bet.
Most people don’t. If you’re eating a balanced diet and doing light to moderate exercise, your food and regular drinks probably provide enough electrolytes for daily needs. Where daily electrolyte supplementation makes sense is for people doing intense exercise, working in hot conditions, or managing a medical condition that affects electrolyte balance.
Both contain meaningful amounts of sodium, so if you have high blood pressure or have been told to limit sodium, check with your doctor before using either. LMNT’s 1,000mg per serving is particularly high and is not recommended for people managing blood pressure concerns without medical guidance.
Thats A Wrap
Both LMNT and Liquid IV are solid electrolyte options and neither is universally better than the other. The right choice really does come down to your specific needs.
For most people, Liquid IV is the more practical everyday choice, with a more moderate sodium level, added vitamins, and a sugar-free option that works well for casual use. LMNT is worth considering if you have exceptionally high sodium needs or simply prefer a cleaner, shorter ingredient list with zero sugar.
And if you’re just looking to stay hydrated on a normal day? Water is still your best bet.
If you’re looking for more of my honest takes on popular health products and topics, here are a few you might like:
I appreciate the in-depth breakdown of the two products. I am taking cycling a little more seriously in mid-stage in life, therefore warning signs of health issues pops up here and there including family history of hypertension and diabetes. Staying hydrated beside water has been tricky and your assessment helps me in choosing which. Thank you!
Really helpful! Thank you!
In your comparison between these two products, I do not see any reference to an extremely important aspect of electrolytes: BIOAVAILABILITY. Salt may be adequate for cardio people, but I medically need the actual electrolytes.
As I understand, the salts like sodium and potassium chlorides tend to not break down very easily, ergo, they aren’t very bioavailable. The chelates and citrates (and possibly other varieties) are more easily accessed and used by the body, hence you get more for your money. The last time I looked, LMNT uses ONLY salts, and is the inferior product from my perspective. Liquid IV uses a combination of chlorides and citrates. Better, but not best. So far, I like Primal Hydration combined with Lyte Pow! drops.