Education › Hydration › Electrolytes

Electrolytes have had a remarkable PR makeover in the last decade. Once a mundane topic in physiology textbooks, they\’re now in glossy supplement packets, premium beverages, and the morning routines of half of social media. The marketing claims have gotten more confident. The underlying science hasn\’t really changed.

For most people in normal life, the honest answer is: electrolytes are important, you almost certainly get enough from food, and the supplements you see advertised are mostly solving a problem you don\’t have.

What electrolytes actually do

Electrolytes are minerals that carry an electrical charge when dissolved in fluid — which is exactly what your body is. They run the basic operations of every cell: muscle contraction, nerve signals, fluid balance, blood pressure regulation, pH stability.

Drinking pure water without enough electrolytes can actually dilute your blood — a real (though uncommon) condition called hyponatremia. This is why marathoners and long-distance hikers occasionally end up in trouble despite drinking plenty: water alone, in large enough amounts, isn\’t quite enough.

The body keeps electrolyte levels in a tightly regulated range automatically, drawing from what you eat and excreting the excess through urine and sweat. Most healthy adults don\’t need to think about this. The body is doing the math for you.

The main electrolytes and where they come from

• Sodium. Regulates fluid balance and blood pressure. Found in almost everything — bread, cheese, soups, sauces, anything packaged. Most people in modern diets get too much, not too little.
• Potassium. Critical for nerve and muscle function, and counterbalances sodium\’s effect on blood pressure. Found in bananas, sweet potatoes, beans, leafy greens, avocados, fish. Many Western diets are low in potassium relative to sodium — which is a real issue.
• Magnesium. Involved in over 300 enzyme reactions in the body. Found in dark leafy greens, nuts, seeds, legumes, whole grains, dark chocolate. Genuine deficiency is more common than the other electrolytes, particularly with diets low in plants.
• Calcium. Beyond bones, calcium also plays a role in muscle and nerve function. Found in dairy, leafy greens, fortified plant milks, tofu, sardines.
• Chloride. Works with sodium for fluid balance. Comes mostly from salt — virtually impossible to be deficient in.
• Phosphate and bicarbonate. Important but rarely an issue in normal diets.

Notice a pattern: every electrolyte is well-represented in a varied diet that includes vegetables, fruits, legumes, and the occasional whole grain. Eat real food, and your electrolyte balance largely takes care of itself.

\”Most people don\’t have an electrolyte deficiency. They have a vegetable deficiency.\”

Who actually needs supplemental electrolytes

There are real situations where electrolyte supplementation makes a meaningful difference. They are far narrower than the marketing suggests.

• Endurance exercise over 60–90 minutes. Particularly in heat. Long runs, long rides, hikes, anything where you\’re losing significant sweat for an extended time. This is the original use case sports drinks were designed for.
• Heavy sweating in hot climates. Manual labour outdoors, intense heat exposure, hot-yoga sessions. The body genuinely loses meaningful sodium and other electrolytes through sweat.
• Illness with vomiting or diarrhoea. One of the most clinically important uses of oral rehydration — losing fluid this fast strips electrolytes faster than you can replace them through food.
• Very-low-carb or fasting protocols. When carbohydrate intake drops sharply, the body excretes more sodium and water. People doing strict keto or extended fasts often genuinely need extra sodium and potassium.
• Certain medical conditions. Kidney disease, some medications, and a few clinical conditions affect electrolyte balance. These need actual medical guidance, not a powder from social media.

If none of the above describes you, you\’re almost certainly fine. The headaches, fatigue, or \”brain fog\” that get marketed as electrolyte symptoms are far more often caused by poor sleep, dehydration with plain water, stress, caffeine timing, or low overall nutrition.

Sports drinks, electrolyte powders, and the marketing problem

The big-name sports drinks were originally formulated for serious athletes losing significant electrolytes through prolonged effort. For that use, they work fine. The problem is they\’re now marketed and consumed as everyday beverages.

A typical mainstream sports drink contains:

• 30–35 grams of sugar per bottle (about the same as a soda).
• Artificial colors, often from the list in the Harmful Ingredients article.
• A modest dose of sodium and potassium.

For a casual gym session or daily life, that\’s a lot of sugar and additives in exchange for a small mineral hit you could get more cleanly from food.

The newer wave of electrolyte powders pitches itself as cleaner — no sugar, no dyes, \”just electrolytes.\” Some are reasonable. Many use high-dose sodium combined with artificial sweeteners, and the daily-use marketing has run far ahead of what most users actually need.

A quick honesty check on any electrolyte product:

• What\’s actually in it (read the ingredients, not the marketing)?
• Are you actually in one of the situations above that calls for it?
• Could you get the same effect from a glass of water, a banana, and some salt on dinner?

For most people, the answer to that last question is yes.

The honest food-first approach

If you want strong daily electrolyte intake without a single supplement, this is what it looks like in practice:

• Eat a variety of vegetables and fruit daily — leafy greens, root vegetables, bananas, citrus, berries.
• Include legumes and whole grains regularly (beans, lentils, oats, quinoa).
• Add nuts and seeds for magnesium (almonds, pumpkin seeds, cashews).
• A modest amount of salt with cooking, particularly if you sweat a lot or follow a low-processed diet.
• Drink water steadily across the day, not in giant bursts.
• If you do long workouts or sweat heavily, add a pinch of salt to your water and a small carb source — homemade and effective.

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