You can raise your electrolyte levels through a combination of whole foods, drinks, and, when needed, supplements. The four electrolytes most people need to pay attention to are sodium, potassium, magnesium, and calcium. Each one comes from different dietary sources and absorbs differently, so a single sports drink won’t cover all your bases. Here’s how to approach each one strategically.
Why Electrolytes Drop in the First Place
Electrolytes are minerals that carry an electrical charge in your body, and they regulate everything from muscle contractions to fluid balance to nerve signaling. You lose them through sweat, urine, and digestion. Heavy exercise, hot weather, illness with vomiting or diarrhea, alcohol, certain medications (especially diuretics), and low-carb diets can all accelerate those losses.
When sodium drops below 135 millimoles per liter in the blood, symptoms like nausea, headache, confusion, fatigue, and muscle cramps can set in. Severe cases can progress to seizures. Potassium imbalances cause similar overlap: muscle weakness, cramping, and fatigue are hallmarks. Because the symptoms of low sodium and low potassium look so alike, blood work is the only way to know which electrolyte is actually low.
Raising Potassium Through Food
Most adults need around 2,600 to 3,400 mg of potassium per day, and most fall short. The good news is that potassium-rich foods are common and easy to add to meals. A single cup of cooked beet greens delivers 1,309 mg, nearly half a day’s worth. Cooked Swiss chard provides 961 mg per cup, and lima beans come in at 955 mg. A medium baked potato with the skin on has 926 mg, making it one of the most accessible high-potassium foods.
Other strong options include cooked yam (911 mg per cup), acorn squash (896 mg), cooked spinach (839 mg), and breadfruit (808 mg). You don’t need exotic ingredients. A baked potato at dinner, a handful of spinach in a smoothie, and some beans at lunch can get you well past the daily target. Bananas, the food most people associate with potassium, actually rank far lower than these options at roughly 420 mg each.
Getting Enough Sodium
For most people, sodium isn’t hard to come by. Processed and packaged foods deliver plenty. But if you eat a whole-foods diet, exercise heavily, or follow a low-carb or ketogenic plan, your sodium levels can dip because your kidneys excrete more sodium when insulin levels are low.
Simple fixes include salting your food to taste, drinking bone broth (a cup typically contains 400 to 500 mg of sodium), or adding a pinch of sea salt to water. If you’re sweating heavily during exercise, a drink with both sodium and a small amount of sugar is especially effective. Your small intestine uses a specific transport system that pairs sodium with glucose: one glucose molecule pulls two sodium ions into your intestinal cells, and water follows passively through the concentration difference this creates. This is the exact principle behind oral rehydration solutions used worldwide to treat dehydration. Pairing a little salt with a little sugar in water isn’t just a trick; it’s basic physiology.
Magnesium: Food First, Then Supplements
Magnesium supports hundreds of enzyme reactions, plays a role in sleep quality, and helps regulate muscle and nerve function. Your body absorbs roughly 30% to 40% of the magnesium you eat, so you need a steady intake from multiple sources. Green leafy vegetables, legumes, nuts, seeds, and whole grains are the best dietary sources. A quarter cup of pumpkin seeds, for instance, delivers about 150 mg, and a cup of cooked black beans provides around 120 mg.
If you supplement, the form matters. Magnesium citrate, chloride, and lactate dissolve well in liquid and are absorbed more completely in the gut. Magnesium oxide, one of the cheapest and most common supplement forms on store shelves, is significantly less bioavailable. If you’ve been taking magnesium oxide and not noticing a difference, switching to citrate or glycinate may help. Start with a modest dose, since high amounts of any form can cause loose stools.
Calcium Beyond Dairy
Dairy is the most obvious calcium source, but it’s far from the only one. Canned sardines with bones pack 325 mg in just 3 ounces. Fortified plant milks (almond, soy, rice) range from 300 to 450 mg per 8-ounce glass, rivaling cow’s milk. Fortified orange juice delivers about 300 mg per cup.
Among whole plant foods, cooked collard greens lead at 266 mg per cup, followed by kale at 179 mg and soybeans at 175 mg. Bok choy, broccoli, and dried figs all contribute meaningful amounts as well. Calcium from leafy greens like kale and bok choy is actually absorbed at a higher rate than calcium from dairy, though you need to eat a larger volume to match the total milligrams. Building calcium into multiple meals rather than relying on one big dose improves absorption, because your body can only take in so much at once.
Sports Drinks vs. Coconut Water
Commercial sports drinks and natural alternatives like coconut water solve different problems. An 8-ounce serving of Gatorade contains 97 mg of sodium but only 37 mg of potassium. Coconut water flips that ratio dramatically: 404 mg of potassium per cup but just 64 mg of sodium. Neither one is a complete electrolyte replacement on its own.
If you’re sweating heavily, sodium is your primary loss, so a sports drink or salted water with a splash of juice will serve you better. If you’re looking for a general potassium boost or recovering from mild dehydration without heavy sweating, coconut water is a solid choice. You can also make a simple homemade electrolyte drink with water, a quarter teaspoon of salt, a tablespoon of honey or maple syrup, and a squeeze of citrus for potassium and flavor.
Risks of Overdoing It
More is not always better with electrolytes, especially potassium. Normal blood potassium sits between 3.5 and 5.0 mmol/L. Once levels climb above 5.5 mmol/L, a condition called hyperkalemia develops. Above 6.5 mmol/L, dangerous heart rhythm changes can occur, including cardiac arrest. This is primarily a risk for people with kidney disease, since healthy kidneys efficiently clear excess potassium. But it’s also why potassium supplements are sold in small doses (typically 99 mg tablets) while the same restriction doesn’t apply to food sources.
Sodium overconsumption is far more common and carries long-term cardiovascular risks, including high blood pressure. For most people, the goal isn’t to maximize electrolyte intake but to match intake to losses. If you exercise moderately, eat a varied diet with plenty of vegetables, and salt your food normally, you’re likely covering your needs. Heavier intervention, like electrolyte supplements or concentrated drinks, makes sense during periods of heavy sweating, illness, fasting, or dietary restriction.
Putting It Together
The most reliable way to keep electrolytes balanced day to day is to build them into your regular meals rather than relying on supplements or specialty drinks. A practical daily pattern might include a potato or serving of beans for potassium, salted food or broth for sodium, a handful of seeds or nuts for magnesium, and a serving of dairy, fortified milk, or leafy greens for calcium. When you’re exercising hard, sick, or eating a restricted diet, layer in an electrolyte drink or targeted supplement to cover the gap.
Pay attention to how you feel. Persistent muscle cramps, unusual fatigue, headaches, or heart palpitations after you’ve ruled out other causes are worth investigating with a basic blood panel that checks sodium, potassium, magnesium, and calcium levels directly.