The 5 Best Ways to Rehydrate Quickly

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It’s important to rehydrate after any activity that causes heavy sweating, such as an intense workout, sauna session, or hot yoga class.

Rehydrating is also crucial for preventing the damaging effects of dehydration if you have the stomach flu or are recovering from a night of drinking.

This article discusses the signs and symptoms of dehydration and the best ways to rehydrate quickly at home.

Signs and symptoms of dehydration

Every cell, tissue, and organ in your body requires water to function.

Water helps regulate body temperature, lubricate joints, transport nutrients, remove waste, and circulate blood. That means your body can’t properly perform these functions if you’re dehydrated, which happens when you lose more fluids than you take in.

For example, you can become dehydrated from sweating, vomiting, experiencing diarrhea, or taking diuretic medications that increase fluid loss.

Certain populations are more prone to dehydration than others, including children, older adults, and people with certain medical conditions like diabetes and kidney disease.

The signs and symptoms of dehydration include.

  • increased thirst
  • dry mouth
  • infrequent urination
  • dry skin
  • tiredness
  • dizziness
  • headache

Urine color is also a common indicator of hydration status. Generally, the paler the color, the better hydrated you are. That said, the color can change for reasons other than your hydration status, including diet, the use of certain medications, and some medical conditions.

Studies have shown that urine color is a valid indicator of hydration in children and young adults but not in older adults.

If you’re worried about your or someone else’s hydration status, here are the 5 best ways to rehydrate quickly.

1. Water

While it likely comes as no surprise, drinking water is most often the best and cheapest way to stay hydrated and rehydrate.

Unlike many other beverages, water contains no added sugars or calories, making it ideal to drink throughout the day or specifically when you need to rehydrate, such as after a workout.

It’s worth noting that a variety of factors, including genetics, cause some people to lose more sodium via their sweat than others. You might be a “salty sweater” if you get frequent muscle cramps with exercise or if your sweat stings your eyes (8Trusted Source).

If either of these applies to you, make sure to replace not just the fluid you lose through sweat but also the sodium, particularly after intense or long bouts of exercise in hot environments.

That said, unless you’re participating in a long, intense activity like an ultra-endurance event in a hot environment, the sodium you lose through sweat can easily be replaced through a balanced diet.

2. Coffee and tea

Coffee and tea contain the stimulant caffeine, which can be transiently dehydrating in excess amounts, as it acts as a diuretic.

However, drinking coffee and tea in moderate amounts can be as hydrating as drinking water and serve as an energizing alternative.

Caffeine becomes dehydrating only in doses around 250–300 mg, the equivalent of two to three 8-ounce (240-ml) cups of coffee, or five to eight 8-ounce (240-ml) cups of tea.

In a study, 50 regular coffee drinkers drank 4 cups (800 ml) of coffee containing 1.8 mg of caffeine per pound (4 mg per kg) of body weight daily. It observed no significant differences between coffee and water in regards to the hydrating ability.

If you don’t like these beverages plain, try adding unsweetened almond milk to your coffee, or herbs and spices like cinnamon, nutmeg, or lemongrass to your tea.

3. Skim and low-fat milk

In addition to supplying a host of nutrients, milk has excellent hydrating properties.

Milk naturally contains high concentrations of electrolytes, which help balance the amount of water in your body.

Research has shown that skim and low-fat milk rehydrate you as well as popular sports drinks after intense exercise, all while providing protein and other important nutrients.

The high-quality protein in milk also makes it an ideal post-exercise beverage for kick-starting muscle repair and the rebuilding process.

Just keep in mind that consuming milk after exercise may cause stomach discomfort like bloating. Plus, it’s not an appropriate option for people who are intolerant to lactose or certain milk proteins.

Milk — namely full-fat milk — might also not be a good option if you’re experiencing diarrhea or vomiting, as it could worsen these conditions.

4. Fruits and vegetables

Comprising 80–99% water, fruits, and vegetables make for a perfect hydrating snack.

For comparison, highly processed foods like cookies, crackers, cereals, and chips contain only 1–9% water.

Fruits and vegetables with the highest water content include:

  • berries
  • melons
  • oranges
  • grapes
  • carrots
  • lettuce
  • cabbage
  • spinach

Stock up on a variety of fresh fruits and vegetables and keep cubed watermelon in your fridge for easy and convenient access.

Frozen fruits and vegetables are just as nutritious as their fresh counterparts, and in some cases, they’re more nutritious.

It often takes days or even weeks before fresh fruits and vegetables make it to your plate. During that time, oxidation can cause nutrient loss. On the other hand, frozen fruits and vegetables are frozen shortly after harvesting, which retains most of their nutrients.

For example, one study showed that frozen green beans and blueberries contained more vitamin C than their fresh counterparts.

Try making a hydrating, nutrient-packed smoothie by combining your favorite fresh or frozen fruits and vegetables in a blender along with milk or Greek yogurt.

5. Oral hydration solutions

Oral hydration solutions are specialized formulas used to prevent and treat dehydration caused by diarrhea or vomiting.

They have also been promoted to bolster exercise recovery and prevent or treat hangovers.

These solutions are water-based and commonly contain electrolytes like sodium, chloride, and potassium, as well as sugar, typically in the form of dextrose. Some commercial solutions also contain other ingredients like prebiotics and zinc.

While these rehydration drinks help replace lost fluids and electrolytes, they can be expensive.

Fortunately, you can make your own using these common kitchen ingredients:

  • 34 ounces (1 liter) of water
  • 6 teaspoons of sugar
  • 1/2 teaspoon of salt

Combine them in a large bowl or pot and stir until the sugar and salt dissolve. You can use flavor enhancers to improve the taste if desired — just keep in mind that they may contain artificial or natural sweeteners and flavors.

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