Skip to content

What not to eat when you are dehydrated?: The definitive diet guide

4 min read

Dehydration can impair cognitive function and physical performance, with studies indicating that even mild fluid loss can affect mood and concentration. When your body's fluid levels are low, knowing what not to eat when you are dehydrated becomes critical, as certain foods and beverages can actually hinder your recovery and worsen your condition.

Quick Summary

Proper nutrition is key to overcoming dehydration. Learn which beverages and foods—such as alcohol, excess sugar and salt, and very high-protein items—to avoid, as they can exacerbate fluid loss and slow down the rehydration process.

Key Points

  • Avoid diuretics: Stay away from alcohol and high-caffeine beverages like coffee and energy drinks, which increase fluid loss through urination.

  • Limit sodium intake: Excessive salt, found in cured meats and salty snacks, forces your body to use more water to excrete the sodium, worsening dehydration.

  • Skip sugary drinks: High-sugar sodas and juices can impair water absorption and may cause stomach upset, leading to further fluid loss.

  • Go easy on protein: Extremely high-protein diets can increase the body's need for water to metabolize waste, so moderate your intake when dehydrated.

  • Choose fresh over dry: Opt for fresh, water-rich fruits and vegetables instead of dried fruits, which have a lower water content and often more sugar.

  • Stay away from fried food: Fried and fatty foods are often high in salt and can hinder the rehydration process, making them a poor choice when you need to recover.

In This Article

Dehydration occurs when you lose more fluid than you take in, disrupting your body's delicate balance of water and electrolytes. While replenishing fluids is the main goal, the foods and drinks you consume play a significant role in how quickly you recover. Choosing wisely can aid the rehydration process, while poor choices can worsen your symptoms. This guide explores the key foods and drinks to avoid to support a quick and effective recovery.

Why certain foods worsen dehydration

When your body is dehydrated, it needs to conserve as much water as possible. Some food and drink choices have properties that can actively work against this, either by increasing fluid loss or by requiring a lot of water to metabolize. Understanding these mechanisms is the first step toward a smarter recovery.

High-Sodium and Salty Foods

Consuming large amounts of salt when dehydrated can significantly increase your thirst and worsen your fluid imbalance. The body requires water to excrete excess sodium. To maintain the correct sodium concentration in the blood, the kidneys pull additional water from the body's cells, which can further intensify dehydration symptoms.

Foods to avoid that are notoriously high in sodium include:

  • Cured and processed meats, such as deli slices, bacon, and hot dogs.
  • Salty snacks like chips, pretzels, and salted nuts.
  • Many fast foods and pre-packaged meals.
  • Pickled foods, which are brined in high-sodium solutions.
  • Excessive use of soy sauce and other salty condiments.

Sugary Drinks and Snacks

High-sugar beverages and treats can be a double-edged sword during dehydration. While they contain fluid, the high concentration of sugar can hinder your body's ability to absorb water effectively. Some highly sugary drinks can also increase the risk of an upset stomach or diarrhea, leading to further fluid loss.

Common sugary items to avoid include:

  • Sodas and most fruit punches.
  • Some commercial sports drinks with excessive sugar, which are not always ideal for mild dehydration.
  • Candy, cookies, and other sugary desserts.

Alcohol and Caffeinated Drinks

Many people are aware that alcohol and caffeine are diuretics, meaning they increase urine production and cause the body to lose fluid. Although moderate amounts of coffee for regular drinkers may not cause significant dehydration, it's a poor choice when you are already dehydrated because it does not actively promote rehydration. When your body is already at a fluid deficit, introducing a diuretic will only exacerbate the problem.

Beverages to limit or avoid include:

  • Alcoholic beverages, such as beer, wine, and liquor.
  • Coffee and caffeinated teas.
  • Energy drinks, which are often high in both caffeine and sugar.

High-Protein Foods

Following a very high-protein diet while dehydrated can put extra stress on your kidneys. Your body uses water to flush out excess nitrogen and other waste products created during the metabolism of protein. An excessively high protein intake requires more water for this process, which can further drain your body's fluid reserves. While protein is an important nutrient, it's best to moderate your intake when focusing on rehydration.

Dry and Fried Foods

Dried foods and fried foods have properties that can be detrimental to rehydration. Dried fruits, for instance, have had their water content removed and are often high in sugar, providing less hydration per serving. Fried foods, on the other hand, are typically high in both salt and fat, which can hinder the rehydration process.

A comparison of rehydrating and dehydrating foods

To make smart choices, it helps to compare foods that hinder recovery with those that help. The following table highlights the differences between what to avoid and what to prioritize when dehydrated.

Food/Drink Category To Avoid (When Dehydrated) To Eat (When Dehydrated)
Beverages Alcohol, coffee, energy drinks, soda, sugary fruit juices Water, oral rehydration solutions (ORS), unsweetened coconut water
Salty Snacks Chips, pretzels, salted nuts, cured meats, pickles Hydrating snacks like cucumbers, melon slices, broth-based soups
Sweet Treats Candy, baked goods, ice cream, sugary cereals Water-rich fruits such as strawberries, watermelon, peaches
Protein Very high-protein meals or supplements, especially in hot weather Lean protein sources in moderation; a bowl of chicken or vegetable soup
Other Fried foods, dry fruits, extremely spicy dishes Yogurt, smoothies, salads with water-rich vegetables

Focus on rehydration: A quick guide

If you're already dehydrated, the best course of action is to focus on reintroducing fluids and electrolytes in the most effective way. This includes prioritizing hydrating foods that also replenish essential minerals.

  • Start with water: Water is always the best and most efficient choice for rehydration. Drinking it slowly can help avoid stomach upset.
  • Embrace water-rich fruits and vegetables: Foods like watermelon (92% water), cucumber (96% water), strawberries (91% water), and lettuce (96% water) are excellent sources of both fluid and nutrients.
  • Sip on broth-based soups: Clear broths, such as chicken or vegetable, are not only easy on the stomach but also provide water and sodium to help rebalance electrolytes.
  • Consider an ORS: For moderate to severe dehydration, an Oral Rehydration Solution (ORS) provides the optimal balance of sugar, salt, and water to aid absorption.

Conclusion

Navigating your diet when dehydrated is crucial for a speedy and complete recovery. By avoiding high-sodium foods, overly sugary drinks, alcohol, and excessive protein, you prevent further taxing your body's fluid balance. Instead, focusing on water and water-rich foods and beverages will give your body the best tools to replenish its fluids and restore proper function. Always listen to your body and prioritize the most hydrating options. If symptoms are severe or persist, seek medical advice.

Visit the official website of the Cleveland Clinic for more health information

Frequently Asked Questions

While moderate coffee intake may not significantly dehydrate regular drinkers, the caffeine is a diuretic, which causes the body to produce more urine. When you are already dehydrated, drinking coffee will not help rehydration and can further challenge your fluid balance.

Salty foods increase the concentration of sodium in your blood. Your body then needs more water to process this excess sodium, pulling fluid from your cells and exacerbating your dehydration.

For moderate to severe dehydration, some sports drinks have electrolytes that are beneficial. However, many commercial sports drinks are high in sugar, which can hinder fluid absorption and may worsen diarrhea. Oral rehydration solutions (ORS) are often a better choice.

No, it is best to avoid dried fruits. They have a significantly lower water content than fresh fruit and are often coated in sugar, which are both detrimental to rehydration.

Plain water is the most effective choice for rehydration for most people. For more serious dehydration or following intense exercise, an oral rehydration solution (ORS) with electrolytes is a good option.

Alcohol is a diuretic, meaning it causes your body to lose more fluid through urination than it is taking in. Consuming alcohol when you are already dehydrated will worsen your fluid deficit and slow down your recovery.

High-protein diets can be dehydrating because the body uses more water to flush out the waste products of protein metabolism. While not an issue in moderation, excessively high protein intake is not recommended during dehydration.

References

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10

Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.