You're Probably Overpaying for Flavored Salt: A Runner's Field Guide to Electrolyte Labels

Electrolyte packets have officially joined the ranks of things that live in every gym bag, glove compartment, and desk drawer in America. By 2026, you can buy them at running stores, big-box retailers, and the checkout line at your local coffee shop. The pitch is always some version of the same story: sweat out the good stuff, pour this in, feel human again. Sometimes that story is true. Sometimes you are paying two dollars for a pinch of table salt and a squirt of artificial strawberry.

This is not a takedown of electrolytes. Sodium, potassium, magnesium, and calcium are real, and they matter. This is a guide to reading the label before you buy another box, because the category has gotten very good at selling vibes instead of numbers.

First, What's Actually in the Packet?

Most electrolyte powders and packets are built on a simple base: sodium chloride, sometimes potassium chloride, often a little magnesium or calcium, plus flavor, citric acid, and a sweetener. That's it. The differences between a $1 packet and a $3 packet are usually not the minerals. They're the flavor system, the brand story, and the packaging.

When you flip the packet over, ignore the front-of-package claims for a second and look at three lines: sodium, potassium, and sugar. Those are the numbers that actually change how the product performs for you.

Sodium is the big one. Sweat is not just water, and it's not evenly salty for everyone. Some runners lose a lot of sodium; others lose very little. A typical electrolyte packet might deliver anywhere from 200 mg to 1,000 mg of sodium per serving. That's a huge range. If you're a heavy sweater on a hot day, a low-sodium packet may be little more than flavored water. If you're a casual gym-goer doing 30 minutes on the elliptical, a 1,000 mg sodium bomb is probably overkill.

Potassium is where labels get sneaky. Many products advertise a "balanced ratio" of sodium to potassium, but sweat is sodium-heavy. Potassium matters for overall electrolyte balance, but a packet with 500 mg of potassium and 200 mg of sodium is not necessarily a better hydration product. It's just a different formula with a different marketing angle. For most endurance athletes, sodium is the priority during long efforts.

Sugar is the third number to check. Some packets include a few grams of sugar to help with absorption and flavor. Others are sweetened with stevia, monk fruit, or sugar alcohols. None of that is automatically bad, but it changes the product. A sugar-free packet is not a carb source. A packet with 15 grams of sugar is basically a small sports drink in powder form. Know which one you're buying.

The Claims That Deserve a Side-Eye

Hydration marketing has a few favorite tricks. The first is the vague promise that a product "replaces what you lose in sweat." That sounds scientific, but it's meaningless without knowing your sweat rate and sweat sodium concentration. Unless you've done a sweat test, you're guessing. The packet is guessing too.

Another common move is to highlight a long list of trace minerals while the actual amounts are tiny. Magnesium, calcium, and zinc may appear on the label in amounts that are a fraction of your daily needs. They're there for the story, not the physiology.

Then there's the "clinically studied" language. Sometimes it refers to a specific ingredient at a specific dose. Sometimes it refers to a study on a completely different formula. If the clinical claim is on the front of the box, check the back for the actual dose. If the dose isn't listed, the claim is decoration.

Finally, watch the serving size. A packet might say "two servings per container" when the packet is clearly designed to be dumped into one bottle. That doubles the sodium, sugar, and price per use in one go. The label math only works if you read the serving size first.

Who Actually Benefits From a Packet?

Electrolyte packets are most useful for people doing sustained, sweaty exercise, typically more than 60 to 90 minutes, especially in heat. Long-distance runners, cyclists, triathletes, and people who work outside in the summer are the obvious candidates. If you finish a workout with salt crusted on your skin, that's a hint you're a salty sweater and might benefit from a higher-sodium option.

People with certain medical conditions, like POTS or other forms of orthostatic intolerance, are sometimes advised by their doctors to increase sodium and fluids. That's a conversation for a clinician, not a checkout page.

On the other side, plenty of people don't need a packet at all. A 45-minute lifting session, a casual 5K, or a yoga class in a climate-controlled studio is not usually a big electrolyte event. Water and a normal meal will do the job. If you have high blood pressure or kidney issues, high-sodium packets are worth discussing with your doctor before you make them a daily habit.

The Cheaper Route That Works

If you're mostly after sodium and fluid, you can make a perfectly reasonable electrolyte drink at home with water, a pinch of table salt, and a squeeze of lemon or a splash of juice. It won't taste like watermelon candy, but it costs pennies. Oral rehydration salts from the pharmacy are another low-cost option, though they're designed for illness recovery and often have a different sodium-to-glucose ratio than sports packets.

None of this means every commercial packet is a scam. Some are well-formulated, third-party tested, and genuinely convenient. The point is to compare them on the numbers, not the label poetry.

A Quick Label Checklist Before You Buy

• Sodium per serving: Look for the actual milligrams, not just "high sodium." Match it to your sweat level and workout duration.
• Potassium per serving: More is not always better. Check whether the ratio makes sense for your needs.
• Sugar and sweeteners: Decide if you want carbs or not. Sugar alcohols can upset some stomachs during runs.
• Price per serving: Divide the box price by the number of packets. Some brands cost more per serving than a bottle of sports drink.
• Third-party testing: Look for NSF Certified for Sport or Informed Choice if you're a competitive athlete subject to testing.

Electrolytes are not complicated. The marketing is. Buy the packet that matches your sweat, your workout, and your budget, and let the flavored salt stay on the shelf if it doesn't earn its place.