You get electrolytes primarily from the foods and beverages you consume every day. Fruits, vegetables, dairy, meat, nuts, and seeds all contain the minerals your body uses as electrolytes. Most people who eat a varied diet get enough without thinking about it, but certain situations like heavy sweating, illness, or restricted diets can create gaps that need extra attention.
What Electrolytes Actually Do
Electrolytes are minerals that carry an electrical charge when dissolved in your body’s fluids. The main ones are sodium, potassium, magnesium, calcium, chloride, and phosphate. They keep your nerves firing, your muscles contracting, and your heart beating in rhythm. Potassium helps your cells, heart, and muscles work properly. Sodium supports nerve and muscle function. Magnesium keeps your muscles, nerves, and heart working as they should.
These minerals also regulate how much water your body holds and where it goes. That’s why electrolyte balance and hydration are so tightly linked. When you lose fluid through sweat, vomiting, or diarrhea, you lose electrolytes with it.
Foods Highest in Electrolytes
Whole foods are the most reliable source of electrolytes, and they come packaged with fiber, vitamins, and other nutrients you won’t find in a supplement.
Potassium-Rich Foods
Most adults need between 2,600 mg (women) and 3,400 mg (men) of potassium per day, and many people fall short. The best food sources include:
- Mung beans: 938 mg per cup
- Baked potato: 583 mg per half medium potato
- Banana: 519 mg per medium fruit
- Baby spinach: 454 mg per cup (raw)
- Dried apricots: 453 mg per 30 grams
- Cooked salmon: 380 mg per 100 grams
- Whole milk: 377 mg per cup
- Butternut pumpkin: 332 mg per half cup (baked)
A single baked potato and a banana at lunch already gets you roughly a third of the way to your daily target. Beans, leafy greens, and sweet potatoes fill in the rest easily across a normal day of eating.
Magnesium-Rich Foods
Adults need 310 to 420 mg of magnesium daily, depending on age and sex. Dark chocolate, nuts (especially almonds and cashews), seeds (pumpkin seeds are standouts), leafy greens, and beans are all dense sources. A quarter cup of pumpkin seeds alone delivers close to half the daily target for most adults.
Calcium and Sodium
Dairy products, fortified plant milks, sardines, and leafy greens like kale supply calcium. Sodium is the one electrolyte most people get too much of rather than too little. The WHO recommends staying under 2,000 mg per day, while U.S. guidelines set the limit at 2,300 mg. Processed and restaurant foods account for the bulk of sodium in most diets, so getting enough is rarely the problem.
Drinks That Provide Electrolytes
Water alone doesn’t contain meaningful electrolytes. When you need both hydration and mineral replacement, certain beverages do double duty.
Coconut water is one of the most popular natural options. It’s rich in potassium and contains moderate amounts of sodium and magnesium without added sugar. Milk (dairy or fortified plant-based) provides potassium, calcium, and sodium in a single glass. Pickle juice and bone broth are high in sodium specifically, which makes them useful after heavy sweating but less ideal as everyday drinks.
Commercial sports drinks contain added sodium, potassium, magnesium, and calcium, but they also tend to include significant amounts of sugar and food dye. For most casual exercisers, they’re unnecessary. They become more useful during prolonged exercise lasting over an hour, especially in heat, when sweat losses are high and you need fast replacement. The combination of sodium and a small amount of sugar actually helps your intestines absorb water more efficiently, which is the principle behind oral rehydration solutions used to treat dehydration worldwide.
When Food Isn’t Enough
A balanced diet covers electrolyte needs for most people in most situations. But several common scenarios can tip the balance:
- Heavy or prolonged sweating: Exercise lasting more than an hour, outdoor labor in heat, or hot yoga all deplete sodium and potassium faster than food alone can replace them. As your body adapts to exercising in heat, you actually sweat more, increasing your need for both fluids and sodium.
- Illness with vomiting or diarrhea: Stomach bugs can drain electrolytes rapidly. Oral rehydration solutions (available at any pharmacy) are specifically designed for this.
- Fever: Elevated body temperature increases fluid and electrolyte losses, putting you at greater risk of imbalance.
- Restrictive diets: Very low-carb or ketogenic diets cause your kidneys to excrete more sodium and potassium in the first few weeks, often producing fatigue, headaches, and muscle cramps sometimes called “keto flu.”
- Alcohol consumption: Alcohol is a diuretic, increasing urine output and pulling electrolytes with it.
In these situations, electrolyte powders, tablets, or drinks can fill the gap more efficiently than trying to eat your way back to balance while sick or mid-workout.
Choosing an Electrolyte Supplement
Electrolyte supplements come as powders you mix into water, effervescent tablets, capsules, and ready-to-drink beverages. The differences that matter most are the mineral profile and the form of each mineral.
For magnesium specifically, organic forms (like magnesium citrate and magnesium glycinate) are absorbed significantly better than inorganic forms (like magnesium oxide). Glycinate in particular uses a different absorption pathway in your gut, which tends to cause less digestive discomfort. If a magnesium supplement has given you loose stools in the past, the form was likely the issue, not the mineral itself.
Look for products that list sodium, potassium, and magnesium content in milligrams so you can compare them to your actual needs. Many popular electrolyte mixes are relatively low in potassium because high doses require a prescription in supplement form due to safety concerns. This means you’ll still need food sources to hit your daily potassium target even if you’re supplementing.
Signs Your Electrolytes Are Off
Mild electrolyte imbalances often feel like general unwellness: fatigue, headaches, muscle cramps, and irritability. These symptoms overlap with simple dehydration, which makes sense because the two conditions usually occur together.
More significant drops, particularly in sodium (a condition called hyponatremia), produce nausea, vomiting, confusion, drowsiness, and muscle weakness or spasms. In severe cases, it can cause seizures or coma. Hyponatremia can happen not only from losing too much sodium but also from drinking excessive amounts of plain water, which dilutes the sodium already in your blood. This is why endurance athletes are advised to drink fluids containing sodium during long events rather than water alone.
Too much of an electrolyte is also dangerous. Excess potassium (from supplements, not food) can cause heart rhythm disturbances. Excess sodium raises blood pressure over time and contributes to cardiovascular disease. The safest approach is to get most of your electrolytes from food, supplement only when a specific situation calls for it, and pay attention to what your body is telling you.