The Short Version
Electrolyte powders are having a moment. The category has grown roughly 2,000% over the past three years, and the shelves at every grocery and convenience store are now stacked with packets from half a dozen well-funded brands. The reason one product is twice the price of the next is almost never what the marketing suggests. It is almost always the sodium.
Across the nine most common brands, sodium per serving ranges from around 230 mg (Nuun) to 1,000 mg (LMNT). That is a 4x range in the single electrolyte most people care about, and it matters enormously depending on what you are actually using the powder for. Casual hydration does not need 1,000 mg of sodium. Endurance work in heat probably does.
Below is the head-to-head comparison and a framework for picking the right product for your use case.
Why Sodium Is the Variable That Matters
Most electrolyte powders include four minerals: sodium, potassium, magnesium, and sometimes chloride. Of these, sodium is the one that drives hydration, performance, and the "did this actually do anything" feeling. Here is the short version of the physiology:
Sodium is the primary electrolyte lost in sweat. Sweat sodium concentration varies by person, but the average is roughly 950-1,150 mg per liter, with heavy sweaters losing more. An hour of hard exercise in moderate heat can produce 1-1.5 liters of sweat, which means 1,000+ mg of sodium loss per hour. If you replace water without replacing sodium, blood sodium drops and thirst dulls before you are actually hydrated. This is why straight water after heavy sweating can leave you feeling worse, not better.
On the other side: if you are sitting at your desk, you do not need 1,000 mg of supplemental sodium. The average American diet already provides 3,400 mg per day, well above the 1,500 mg adequate intake level. Low-activity buyers using LMNT daily are probably getting more sodium than they need.
This is why the use case drives the product. Low sodium is fine for casual hydration. High sodium is specifically valuable for endurance, heat stress, keto/low-carb adaptation, and people who sweat heavily.
The Full Comparison
Below are the nine most commonly bought electrolyte products, compared on the variables that actually vary. All values are per stick or single serving as labeled on the current 2026 packaging. Prices reflect typical retail; bulk packs lower the per-serving cost modestly.
Head-to-head table
| Product | Sodium | Potassium | Magnesium | Sugar / Carbs | Price per serving |
|---|---|---|---|---|---|
| LMNT | 1,000 mg | 200 mg | 60 mg | 0 g / 0 g | $1.50 |
| Liquid IV Hydration Multiplier | 500 mg | 370 mg | trace | 11 g / 12 g | $1.25 |
| Nuun Sport | 300 mg | 150 mg | 25 mg | 1 g / 4 g | $0.50 |
| Pedialyte Sport | 490 mg | 370 mg | trace | 6 g / 14 g | $0.90 |
| Ultima Replenisher | 55 mg | 250 mg | 100 mg | 0 g / 1 g | $0.80 |
| Nectar | 230 mg | 200 mg | 20 mg | 1 g / 2 g | $1.15 |
| Body Armor LYTE | 40 mg | 700 mg | trace | 3 g / 6 g | $1.50 |
| Gatorade Powder | 270 mg | 75 mg | 0 mg | 34 g / 36 g | $0.35 |
| Costco Kirkland Hydration (store brand) | 520 mg | 380 mg | trace | 11 g / 11 g | $0.45 |
A few notes on the table. Ultima is the outlier on sodium - it is essentially a potassium-magnesium product with token sodium, which makes it a poor choice for sweat replacement. Body Armor LYTE is in the same boat. Gatorade Powder is primarily a carbohydrate drink with modest electrolytes; the sugar content is the point, not a flaw, if you are doing endurance work that needs carbs.
The Category, Broken Down
High-sodium performance products (LMNT)
LMNT is the category leader for a reason. At 1,000 mg of sodium per stick, it sits at roughly the amount you lose in an hour of moderate-intensity sweat, which means one stick roughly replaces what you lose in an hour of hard training. The no-sugar formula matches what most of its customer base wants: endurance athletes, keto dieters, fasters, and people who drink sparkling water with a dash of salt anyway.
The complaint is price. At $1.50 per stick, a daily habit runs $45 a month. That is steep for casual hydration but reasonable for someone training five days a week in heat or following a low-carb diet where electrolyte replacement matters more than usual.
The other complaint is flavor profile. LMNT tastes aggressively salty, because it is aggressively salty. New users are sometimes put off; regular users generally adapt. Try citrus flavors first.
Moderate-sodium mainstream (Liquid IV, Pedialyte Sport, Kirkland Hydration)
Liquid IV dominates this tier commercially, though its nutritional profile is not dramatically differentiated. It uses an "osmolarity transport" claim based on sugar-sodium glucose cotransport, which is real physiology but not unique to Liquid IV. Every sports drink with sugar and sodium does the same thing. The product delivers 500 mg sodium and 370 mg potassium along with 11 g of sugar per stick, roughly equivalent to Pedialyte Sport with slightly different proportions.
Kirkland Hydration is Costco's store-brand version of essentially the same formula. It is slightly under half the price of Liquid IV and delivers similar nutrition. If you like the Liquid IV category but balk at the price, Kirkland is the obvious swap.
Pedialyte Sport is the same category product targeted at pediatric and post-illness hydration markets. The formula is balanced for rehydration rather than performance; potassium is notably higher than most competitors.
Low-sodium casual hydration (Nuun, Nectar)
Nuun and Nectar sit in the 200-300 mg sodium range, which is enough to move hydration without saturating you. These are the right fit for the person who drinks an electrolyte mix most days as an upgrade over plain water, not for athletic performance.
Nuun Sport sells as tablets that dissolve in water, which is convenient and avoids single-use packet waste. At $0.50 a serving, it is a solid value. The sugar content is minimal (1 g), which is appropriate for its casual-use positioning.
Nectar is the newer premium entrant in the low-sodium category, positioned around flavor quality and cleaner ingredients. It costs more than Nuun and delivers comparable nutrition; the value proposition is experiential rather than physiological.
Potassium-forward products (Ultima, Body Armor LYTE)
Ultima and Body Armor LYTE both run high on potassium and low on sodium. In practice this is a poor fit for endurance or sweat replacement, where sodium is what you actually lose. They work fine as general mineral supplements and are popular with people who dislike the salty taste of higher-sodium products. If your reason for using a powder is "I want a hydration-flavored drink without sugar," these work. If you are chasing performance, pass.
High-sugar classic sports drinks (Gatorade Powder)
Old school and still useful for specific cases. Gatorade delivers substantial carbohydrate (34 g per serving) alongside modest electrolytes, which is exactly what you want for endurance events over 60-90 minutes where carbohydrate is a limiting factor. For casual hydration it is overkill in sugar and undersized in sodium. For a century bike ride or a marathon, Gatorade and its commodity equivalents are still defensible.
Picking by Use Case
Casual daily hydration
Most buyers are in this bucket: they want something more interesting than water and a modest electrolyte boost. 200-500 mg of sodium per day from a powder is plenty if your diet is not extremely low-sodium. Best fits: Nuun Sport ($0.50/serving), Kirkland Hydration ($0.45/serving), or Nectar ($1.15/serving) if you want the premium flavor experience. Do not spend LMNT money for this use case.
Endurance training in heat, serious athletes
This is where sodium content earns its price premium. If you are running, cycling, hiking, or lifting heavily in heat for 60+ minutes, one packet of LMNT per hour of training is the most defensible choice. Liquid IV is a reasonable second option if you also want the carbohydrate. For multi-hour endurance events, consider combining: one LMNT for sodium, plus a carbohydrate source like Gatorade or a dedicated endurance fuel product.
Keto, low-carb, intermittent fasting
Low-carb diets reduce insulin, which reduces sodium retention, which means you lose more sodium through urine. This is why people starting keto often get "keto flu" - fatigue, headaches, brain fog - that is largely a sodium and electrolyte shortfall. LMNT was explicitly designed for this population. Ultima is a distant second because its potassium-forward formula addresses the other half of the picture but misses the sodium piece.
Post-illness rehydration
Pedialyte Sport or standard Pedialyte. The formula is balanced for the specific physiology of dehydration following GI illness. LMNT works fine too if you already have it on hand, but you do not need its full sodium load for rehydration.
Budget-focused hydration
Kirkland Hydration from Costco is the obvious pick at $0.45 per serving with 520 mg sodium and 380 mg potassium. Nuun Sport at $0.50 is close behind with a lower sodium profile. Gatorade Powder at $0.35 is the cheapest if you want the sugar. Avoid paying more than $0.75 per serving for daily casual use; the premium for brand naming does not buy you better electrolytes.
What Most Reviews Get Wrong
They compare on flavor, not sodium
Flavor matters, but it does not define the product category. Two powders with the same flavor line can have a 5x sodium difference. Buyers who optimize on flavor first often pick Nuun and wonder why it does not feel as impactful as LMNT during a hot run. The answer is not flavor; it is that one has triple the sodium.
They conflate sugar with value
Liquid IV's higher sugar content is not a defect, just a choice. Sugar provides fuel for endurance and helps with rapid fluid absorption. The right question is not "does this have sugar" but "am I working hard enough to need it." A desk worker sipping Liquid IV all day is consuming roughly 40-50 g of added sugar they do not need. A marathoner on mile 18 is exactly the target audience.
They assume more electrolytes equals better
Electrolyte imbalance is real, but most casual buyers are not deficient in anything. They are just slightly dehydrated. A $1.50 stick of LMNT does not make you more hydrated than a $0.50 tablet of Nuun if you are sitting at a desk. It makes your urine saltier. Match dose to activity.
Safety and Who Should Be Cautious
Healthy adults tolerate well over 2,000 mg of supplemental sodium per day without issue, especially if they are sweating. However, several populations should be careful:
- People with hypertension or cardiovascular disease. A daily 1,000 mg sodium packet is meaningful if you are actively managing blood pressure. Low-sodium options like Ultima or Nuun are better fits.
- People with kidney disease. Electrolyte loads, especially potassium, can accumulate when kidneys are impaired. Supplement under medical supervision.
- People on medications affecting electrolyte balance. Diuretics, ACE inhibitors, SGLT2 inhibitors, and lithium all interact with electrolyte handling. Check with your provider before adding significant supplemental sodium or potassium.
For healthy people, there is essentially no risk from using any of the products above at labeled doses.
The Bottom Line
Match the product to the use case, not the marketing. If you are casually hydrating at a desk, Nuun or Kirkland are fine and the price is right. If you are training hard in heat, on a low-carb diet, or sweating heavily for work, LMNT earns its price premium. If you are running a marathon or doing endurance events over 90 minutes, add carbohydrate (Liquid IV, Gatorade, or a dedicated fuel product) on top of sodium. The category feels complex because marketing has made it complex. The physiology is simple: how much sodium do you lose, and how much do you need to replace?
For related reading, see our guide to magnesium forms - magnesium is a secondary electrolyte that most hydration powders underdose relative to what some users actually need.
Sources
- Sawka MN, Burke LM, et al. American College of Sports Medicine position stand: exercise and fluid replacement. Med Sci Sports Exerc. 2007;39(2):377-390. PubMed
- Baker LB. Physiology of sweat gland function: The roles of sweating and sweat composition in human health. Temperature. 2019;6(3):211-259. PubMed
- Thomas DT, Erdman KA, Burke LM. American College of Sports Medicine joint position statement: nutrition and athletic performance. Med Sci Sports Exerc. 2016;48(3):543-568. PubMed
- Institute of Medicine. Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate. National Academies Press. 2005. NAP
- Shirreffs SM, Sawka MN. Fluid and electrolyte needs for training, competition and recovery. J Sports Sci. 2011;29 Suppl 1:S39-S46. PubMed