Walk through any grocery store or gym lately and you’ll probably see electrolyte drinks, powders and tablets on the shelves. Many promise better hydration, more energy and improved athletic performance. But what exactly are electrolytes, and do most people actually need them?
Electrolytes, like sodium, potassium, calcium, magnesium and chloride, are minerals that help your body work properly. They balance fluids, control muscle contractions, support nerve function and keep your heartbeat steady. Most healthy people get enough of these minerals from what they eat and drink regularly, without needing special drinks or supplements, but there are times when extra electrolytes can be helpful.
If you exercise hard for more than an hour, sweat heavily, spend long periods outdoors in hot weather or lose fluids from vomiting or diarrhea, your body can lose electrolytes along with water. In these situations, replacing both fluids and electrolytes may help prevent dehydration, muscle cramps, dizziness and fatigue. Electrolytes can also be useful for older adults who may become dehydrated more easily, or for people who take diuretics (water pills), which may lower potassium levels.
Otherwise, most people probably don’t need sports drinks during everyday activities or short workouts. If you’re taking a 30-minute walk or doing a light gym session, water is usually enough.
One of the best ways to get electrolytes is through food. Some electrolyte drinks contain a lot of added sugar and sodium that your body may not need, and many healthy foods naturally contain the minerals your body does need, such as:
- Potassium: bananas, potatoes, beans, yogurt and spinach
- Magnesium: nuts, seeds, whole grains and leafy greens
- Calcium: milk, yogurt, cheese and fortified plant milks
- Sodium and chloride: cheese, pickles, soups and many everyday foods
Coconut water is another natural source of electrolytes, especially potassium. Milk can also help replace fluids and electrolytes after exercise because it contains sodium, potassium and protein.
If you do need an electrolyte drink, look for one with less added sugar unless you’re doing intense endurance exercise. You can also make your own electrolyte drink at home by mixing water with a splash of fruit juice and a small pinch of salt.
Although your body needs electrolytes, it’s important not to overdo them. Too much sodium can raise blood pressure and increase strain on the heart and kidneys. Excess potassium can be dangerous for people with kidney disease or those taking certain medications because the kidneys may not be able to remove the excess properly. Very high levels of some minerals can also lead to irregular heartbeats or other serious health problems.
Most people don’t need special electrolyte drinks, powders or tablets to stay healthy. Eating balanced meals and drinking enough fluids are usually the best ways to maintain healthy electrolyte levels, except in some situations, where you may need more of these minerals quickly than you can get from food.
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