The best electrolyte drink depends on what you’re using it for. A long-distance runner losing a gram of sodium per hour needs something very different from someone fighting a hangover or supplementing a keto diet. No single product wins across all situations, but understanding a few key ingredients will help you pick the right one fast.
What Actually Makes an Electrolyte Drink Work
Your body absorbs water faster when sodium and a small amount of glucose are present in the drink. Sodium and glucose activate a transport protein in your intestinal lining that pulls water through alongside them. This is why plain water alone hydrates more slowly than a well-formulated electrolyte solution, and it’s the same principle behind oral rehydration therapy used in hospitals worldwide.
But there’s a catch with sugar. Drinks with a carbohydrate concentration of 2.5% or less leave the stomach at roughly the same speed as plain water. Once you hit 6% or higher, stomach emptying slows significantly, which can cause bloating and that sloshing feeling during exercise. Even concentrations of 4% to 5% produce a measurable delay. For reference, a standard 20-ounce Gatorade sits at about 6% carbohydrate. So more sugar doesn’t mean better hydration. It often means slower hydration.
Sodium Is the Ingredient That Matters Most
Sodium is the primary electrolyte you lose in sweat, and it’s the one most responsible for maintaining fluid balance. For everyday hydration or mild activity, 300 to 500 milligrams per serving is plenty. For heavy sweating during long runs, cycling, or hot outdoor work, athletes are typically advised to replace around 1,000 milligrams of sodium per hour.
Many popular electrolyte drinks fall short here. A cup of coconut water, for instance, contains only 64 milligrams of sodium. It’s rich in potassium (404 milligrams per cup), which makes it a decent general wellness drink, but it won’t replace what you lose during a hard workout.
How the Top Brands Compare
Here’s how several widely available electrolyte powders stack up per serving:
- LMNT: 1,000 mg sodium, 200 mg potassium, no sugar
- Liquid IV (Sugar-Free): 500 mg sodium, 370 mg potassium, no sugar
- Transparent Labs Hydrate: 500 mg sodium, 250 mg potassium, no sugar
- Mortal Hydration Sport: 460 mg sodium, 150 mg potassium, 8 g sugar
- Gainful High Performing Hydration: 400 mg sodium, 150 mg potassium, 2 g sugar
- DripDrop: 330 mg sodium, 185 mg potassium, 7 g sugar
- Nuun Sport: 300 mg sodium, 150 mg potassium, 1 g sugar
LMNT stands out for heavy sweaters, endurance athletes, and anyone on a low-carb diet because of its high sodium content and zero sugar. Liquid IV’s sugar-free version offers a strong balance of sodium and potassium without the sweetness. Nuun works well for casual exercise or desk-job hydration where you don’t need aggressive sodium replacement.
Picking the Right Drink for Your Situation
Everyday Hydration
If you’re not exercising intensely but want something better than plain water (maybe you feel sluggish, get headaches, or just don’t drink enough), a lower-sodium option like Nuun or Liquid IV is a good fit. You’re not losing massive amounts of electrolytes, so 300 to 500 milligrams of sodium per serving is sufficient. Keep sugar low or zero.
Endurance Exercise and Heavy Sweating
When you’re running, cycling, or working outdoors for more than an hour, you need closer to 1,000 milligrams of sodium per hour. LMNT hits that mark in a single packet. Alternatively, you can use two servings of a mid-range product like Transparent Labs. Avoid drinks with more than 5% to 6% carbohydrate concentration if you’ll be drinking while active, since they’ll sit in your stomach longer.
Keto or Low-Carb Diets
Low-carb diets cause your kidneys to excrete more sodium and potassium than usual. A well-formulated ketogenic diet calls for 3,000 to 5,000 milligrams of sodium and 3,000 to 4,000 milligrams of potassium daily. That’s substantially more than most people get from food alone. Sugar-free, high-sodium options like LMNT are popular in this community for good reason. You’ll likely need two to three servings spread through the day, plus potassium-rich foods like avocado and leafy greens, to hit those targets.
Illness and Recovery
When you’re recovering from a stomach bug, food poisoning, or a rough night of drinking, your body needs both sodium and a small amount of glucose to maximize absorption. This is one situation where a product with some sugar, like DripDrop (designed around oral rehydration science), can actually work better than a zero-sugar alternative. The glucose activates that intestinal transport mechanism and speeds water into your system.
The Potassium Factor
Most electrolyte conversations focus on sodium, but potassium matters more than people realize. Research from Harvard Health suggests the ratio of sodium to potassium in your diet may be more important than the absolute amount of either one. Our ancestors consumed a sodium-to-potassium ratio of roughly 1 to 16. The modern diet has flipped that entirely: the average person now takes in more sodium (3,400 mg) than potassium (2,500 mg).
Electrolyte drinks alone won’t fix this imbalance, since even the highest-potassium option on this list (Liquid IV at 370 mg) provides only a fraction of your daily need. But choosing a drink with a decent potassium content, and pairing it with potassium-rich foods, helps move the ratio in a healthier direction. Coconut water’s 404 milligrams of potassium per cup makes it a worthwhile addition on rest days or alongside meals.
Check the Magnesium Form
Many electrolyte powders include magnesium, but the form varies. Magnesium bound to glycine (often listed as magnesium glycinate) absorbs well and is gentle on your stomach. Magnesium bound to citric acid (magnesium citrate) also absorbs well, but it has an osmotic effect in the gut that can loosen stools. If a product gives you digestive trouble, check which form of magnesium it uses. Glycinate is the safer bet for daily use. Citrate is fine if your digestion handles it, and some people actually prefer it for that mild laxative effect.
Making Your Own
A DIY electrolyte drink is surprisingly simple: mix about a quarter teaspoon of salt (roughly 500 to 600 mg sodium) into 16 to 20 ounces of water, add a splash of lemon or lime juice for flavor and a small amount of potassium, and optionally stir in a teaspoon of honey or sugar if you want that glucose-assisted absorption. This won’t taste as polished as a commercial mix, but it’s chemically doing the same job for pennies per serving. For keto purposes, skip the sweetener and add a pinch of potassium chloride (sold as “lite salt” in grocery stores) to cover both electrolytes at once.