Electrolytes: What They Are, Who Actually Needs Them, and Why the Market Is Out of Hand

If you've walked into a gym, a grocery store, or a CVS in the last two years, you've noticed something. Every aisle now has electrolyte products. Sticks, packets, drops, tabs, powders, "hydration multipliers," IV-alternative branding, mineral salts. Some contain 1,000 milligrams of sodium per serving. Some contain 80. Some are aggressively flavored. Some taste like the ocean.

A lot of people are now drinking three or four of these a day "for hydration," with no clear idea what's in them, what they're correcting, or whether they actually need any of it.

What are electrolytes?

Electrolytes are minerals that carry an electrical charge when dissolved in body fluid. The main ones are:

• Sodium

• Potassium

• Chloride

• Magnesium

• Calcium

• Phosphate

• Bicarbonate

These minerals run a lot of basic biology. Nerve signaling, muscle contraction (including your heart), fluid balance inside and outside your cells, blood pressure regulation, and pH balance all depend on electrolytes being in the right concentrations.

Your body keeps electrolyte levels in a tight range on its own. You eat them, you sweat them out, you pee out the excess, your kidneys adjust the balance. You aren't manually managing any of this most of the time, and you don't need to.

Where do electrolytes come from?

Mostly food. For example:

• Sodium: salt, packaged foods, broth, soy sauce, cheese, olives, pickles, deli meat

• Potassium: potatoes, bananas, beans, leafy greens, dairy, salmon, avocado, tomatoes

• Magnesium: nuts, seeds, whole grains, leafy greens, dark chocolate

• Calcium: dairy, fortified plant milks, tofu, sardines, leafy greens

• Chloride: salt and most foods that contain sodium

If you eat a reasonably mixed diet, you are getting electrolytes constantly, in amounts you do not need to think about. The "you need to supplement to get enough" framing is doing some heavy lifting that the underlying nutrition science doesn't really support for most people.

Who actually needs supplemental electrolytes

A much shorter list than the market would suggest.

1. Endurance athletes during long efforts. Sessions over 60 to 90 minutes, especially in heat, especially with heavy sweating. A marathon, an Ironman, a long gravel ride, a hot trail run. Sodium losses through sweat in those scenarios genuinely exceed what you can replace with plain water.

2. High sweaters. Some athletes lose dramatically more sodium per liter of sweat than others. Salt-crusted hats, stinging eyes, and white streaks on dark clothing are real signals. If you're an athlete with consistent salty-sweat patterns, supplementing during long efforts is reasonable and often necessary.

3. People with acute GI illness. Vomiting, diarrhea, food poisoning. Pedialyte and similar oral rehydration solutions exist for exactly this reason and are the medically sensible product in this category.

4. People with specific medical conditions. Certain heart, kidney, adrenal, or GI conditions create electrolyte needs that have to be managed clinically. This is a doctor conversation, not a "grab a packet" situation.

5. People doing extreme work in extreme heat. Outdoor laborers, military, wildland firefighters, roofers in July. The "I sweat through my shirt three times today" demographic.

If you're not in one of these categories, your need for supplemental electrolytes on a normal day is approximately zero.

Who doesn't need three electrolyte packets a day

Almost everyone else, including:

• People who work in offices and walked from a desk to a fridge

• People who do a 45-minute spin class or strength session

• People who run a few miles in mild weather

• People who feel "a little tired" in the afternoon

• People who drink electrolyte packets because they like the taste (which is fine)

This is not in anyway judgement — If you enjoy your daily LMNT and you're not running into the issues I'm about to describe, carry on.

The risks of overdoing it

Most people assume excess electrolytes are harmless because "you'll just pee them out." That's mostly true for healthy kidneys. But there's still a real cost.

• Excess sodium can drive blood pressure up, especially in people who are sodium sensitive. Adding 1,000 to 3,000 milligrams a day of supplement sodium on top of a normal diet pushes most people well past what major cardiology groups recommend.

• Magnesium and potassium supplements can cause GI symptoms. Cramping, diarrhea, nausea. Magnesium especially.

• People with kidney disease, certain blood pressure medications, or heart conditions can have serious problems with potassium and magnesium loads. Don't supplement these casually if you have a relevant medical history.

• Hyponatremia (dangerously low sodium) from drinking too much plain water during long efforts is real, but the opposite is also possible: headaches, confusion, and elevated blood pressure from too much sodium too fast.

• Mineral interactions matter. Large calcium loads can blunt magnesium absorption. Large sodium loads can pull calcium out of bone over time. Your body wants balance, not maximalism.

• A lot of money for slightly flavored water. Not a medical risk, but it can certainly get expensive.

Electrolytes in Austin, TX

Austin is a city where electrolyte products are part of the social uniform. The combination of heat, year-round outdoor training, hot yoga, the wellness scene, and a young performance-oriented professional class creates ideal conditions for the industry to thrive here.

That doesn't mean it's all overkill. If you're doing a two-hour outdoor run in August, electrolytes are legitimate. The heat affects people who are out in it.

So what do you do?

If you're not an endurance athlete or someone with a specific medical situation:

• Eat food. Salt your food normally. Eat fruit and vegetables.

• Drink water when thirsty. More on hot days, more around exercise.

• Use an electrolyte product when you're doing something that justifies it (long efforts, heat, high sweat, illness).

• Don't drink them as a daily habit unless you have a clear reason or desire to.

• Do I need electrolytes every day?

  For most people, no. A normal mixed diet provides plenty of electrolytes. Daily supplementation is genuinely indicated for a much smaller group than the marketing suggests: endurance athletes, high sweaters, people with specific medical conditions, and people doing heavy outdoor work in heat.

• Are LMNT and Liquid IV worth it?

  They're worth it for the situations they were designed for: heavy sweat loss, long workouts, illness, heat. For sedentary or low-activity daily use, you're paying for flavored water. The products aren't bad. They're often being used outside their intended context.

• How much sodium is too much?

  The American Heart Association recommends keeping sodium under 2,300 milligrams a day for most adults, and ideally closer to 1,500 milligrams for people with high blood pressure or cardiovascular risk. A single high-sodium electrolyte packet can be 1,000 milligrams on its own, before you eat any food. Worth doing the math.

• Can I get electrolytes from food alone?

  Almost always, yes. Food covers most people's needs comfortably. Supplements become useful when sweat losses, illness, or a specific medical condition push needs above what food can keep up with.

• Are coconut water and pickle juice legitimate electrolyte sources?

  Coconut water is reasonably high in potassium but low in sodium, so it's not a complete sports drink for heavy sweat loss. Pickle juice is high in sodium and is genuinely used by some athletes for cramp prevention, with mixed but interesting evidence. Both are real options!

• Do I need an electrolyte drink after a normal gym workout?

  Usually no. A 45-minute strength or cardio session in air conditioning doesn't generate the sweat losses that justify supplementation. Water and your next meal will cover it.

• What about magnesium for sleep?

  Magnesium glycinate at modest doses is reasonably well tolerated and there's some evidence for sleep benefit, especially in people who are genuinely low in magnesium. It's also a common scapegoat for sleep problems that have other root causes. Worth trying if you've ruled out the bigger ones (caffeine, screens, schedule, stress, alcohol).

At Khan RD, we work with athletes on fueling and hydration plans, and with the general population on figuring out what's actually useful versus what's marketing. In-network with Aetna, BCBS, and UnitedHealthcare, in person in Austin and virtual across Texas.

The content of this blog does not serve as medical advice.