Short answer: not the same. Electrolyte packets replace more than just table salt (sodium) and are formulated to restore the salts and sugars your body loses in sweat, diarrhea, or vomiting. Plain salt water only provides sodium and chloride and misses potassium, sometimes magnesium and the glucose/organic acids that help your gut absorb fluids quickly. Why electrolyte packets are usually worth it Balance of ions: Good packets contain sodium and potassium (and sometimes magnesium/calcium) — all important for nerve, muscle and heart function. Salt water supplies only sodium/chloride. Faster absorption: Many packets include glucose or citrate. Glucose stimulates intestinal sodium/glucose co-transporters, improving water uptake (this is the basis of oral rehydration solutions). Palatability and safety: Packets are flavored and easier to drink than very salty water, and they provide measured doses so you don’t accidentally overconsume salt. Convenience: Pre-measured sachets or tablets are portable, shelf-stable and intended for rehydration needs. When plain salt water might be okay Very mild salt loss (a short, light workout) — a salty snack and plain water may be sufficient. If you just want to retain a bit more water, sodium alone can help short-term. But it won’t replace potassium or any other lost electrolytes. When to choose a formulated electrolyte product Diarrhea, vomiting, or fever (especially in children): use WHO-style oral rehydration solutions (e.g., Pedialyte). Long endurance exercise or heavy, prolonged sweating: use products with higher sodium + potassium. Low-carb/keto diets where you’re intentionally limiting carbs: consider no-sugar, high-sodium options. Hangover or after alcohol: balanced electrolyte + fluids help more than salt water alone. Brand recommendations (by use) Pedialyte: clinically formulated ORS for kids/adults during illness; good electrolyte balance for rehydration. DripDrop ORS: medical-grade, fast-acting rehydration formula (good for illness, travel, endurance). Liquid I.V.: popular glucose-based powder for fast absorption and convenience (sport/travel/hangover). Nuun: effervescent tablets, low-sugar, containing potassium and magnesium — good for everyday sports use. LMNT: no sugar, high sodium with potassium/magnesium — favored by keto or those needing high sodium. Choose based on whether you want sugar (helps absorption but adds calories), how much sodium you need, and whether you need potassium/magnesium. Safety notes Don’t drink seawater — it’s dangerously high in sodium and will dehydrate you further. Homemade salt-only solutions can lead to imbalance, especially in infants, elderly, or sick people. If someone is severely dehydrated, has confusion, fainting, rapid pulse, or cannot keep fluids down, seek medical care. Read labels for sodium and potassium amounts if you have heart, kidney, or blood-pressure conditions — some formulas may be too high in sodium for you. If you tell me the situation (kids with diarrhea, after a race, hangover, keto, etc.), I can recommend one or two specific products and dosing/timing tips.
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