The most effective home remedy for dehydration is a simple sugar-salt solution mixed with water, sometimes called oral rehydration therapy. For mild to moderate cases, most people recover within 24 to 48 hours using oral fluids alone. The key is not just drinking water, but replacing the electrolytes your body lost along with it.
The Sugar-Salt Solution
The gold standard home remedy is a mixture the World Health Organization has recommended for decades: 8 level teaspoons of sugar and 1 level teaspoon of salt dissolved in 1 liter (about 4 cups) of clean water. This isn’t just folk wisdom. The specific ratio of sugar to salt exploits a transport system in your small intestine where sodium and glucose are pulled into cells together. When both are present in the right proportions, water follows them through the intestinal wall and into your bloodstream far more efficiently than plain water alone.
The ratio matters. Too much sugar actually works against you. Excess sugar in the gut draws water out of your body and into your intestines through osmotic pressure, which can cause loose stools and make dehydration worse. This is exactly why soda, fruit juice, and sports drinks with high fructose content are poor choices when you’re already dehydrated. Fructose in particular stimulates the gut to release water and electrolytes, loosening bowel movements.
Sip the solution steadily rather than gulping it. For adults, aim for 1 to 2 liters over the first 4 hours, then continue drinking as needed.
Coconut Water
If mixing your own rehydration drink doesn’t appeal to you, coconut water is a reasonable natural alternative. It’s rich in potassium and contains sodium, chloride, and a small amount of natural sugar, roughly 1 gram per 100 milliliters. That electrolyte profile makes it significantly better than plain water for rehydration, though it’s lower in sodium than the WHO solution. For mild dehydration from exercise or a hot day, coconut water works well. For dehydration caused by vomiting or diarrhea, where sodium losses are high, the sugar-salt solution is the better choice.
Foods That Help You Rehydrate
Eating water-rich foods is an underrated way to restore hydration, especially if drinking large volumes of fluid feels uncomfortable. Cucumbers, watermelon, strawberries, celery, lettuce, and zucchini are all 90% to 100% water by weight. A bowl of watermelon chunks delivers both fluid and natural sugars that aid absorption.
The next tier, at 80% to 90% water, includes oranges, peaches, pears, apples, and pineapple. These also provide potassium, which is one of the key electrolytes you lose when dehydrated. Broth-based soups pull double duty by providing both sodium and fluid in a form that’s easy on the stomach, making them especially useful when dehydration stems from illness.
What to Avoid While Dehydrated
Some drinks that seem hydrating can slow your recovery. Sodas and commercial fruit juices are high in fructose, which triggers the intestines to secrete water and electrolytes rather than absorb them. Coffee and alcohol both increase urine output, pushing fluid out faster than you’re taking it in. Even undiluted apple juice, often given to sick children, can worsen diarrhea because of its fructose and sorbitol content.
Stick to the sugar-salt solution, coconut water, diluted broths, or plain water paired with salty crackers or pretzels. The goal is always getting both fluid and electrolytes into your system together.
Rehydrating Children
Children dehydrate faster than adults because of their smaller fluid reserves. For a child with mild to moderate dehydration, the CDC recommends giving 50 to 100 milliliters of oral rehydration solution per kilogram of body weight over 2 to 4 hours. For a 22-pound (10 kg) toddler, that works out to roughly 2 to 4 cups over a few hours. Give small, frequent sips rather than large amounts at once, which can trigger vomiting.
Pharmacy rehydration products designed for children have carefully calibrated electrolyte levels and are generally preferable to homemade solutions for young kids, since small measurement errors in the sugar-salt recipe matter more in a smaller body.
How to Tell If It’s Working
The simplest gauge of hydration is your urine. Dark yellow or amber urine signals dehydration. As you rehydrate, it should gradually lighten to pale yellow or nearly clear. Most adults with mild to moderate dehydration feel noticeably better within a few hours of steady fluid intake and return to normal within 24 to 48 hours.
Some signs indicate that home remedies aren’t enough. In adults, watch for confusion, rapid heartbeat, very dark urine despite drinking fluids, or an inability to keep fluids down. In infants and young children, skin that doesn’t spring back quickly when gently pinched (called “tenting”), no tears when crying, or no wet diapers for several hours all signal a level of dehydration that needs medical attention. Severe dehydration can become dangerous quickly and sometimes requires intravenous fluids that can’t be replicated at home.