Dry fasting vs. water fasting—what are the risks, and which is the better fasting routine?
While dry fasting involves avoiding both food and water, water fasting allows the consumption of water only during the fasting period.
Here’s how you can maximize the benefits of fasting while minimizing potential side effects.
Benefits of fasting
Fasting does more than just promote weight loss, as it initiates a powerful cascade of healing processes that support cellular repair, energy production, brain function, and metabolic health.
Whether you choose intermittent fasting or extended fasts, allowing your body time without processing and metabolizing food can unlock a wide range of health benefits.
Here are some of the top health benefits of fasting:
- Promotes brain cell regeneration
- Enhances cellular energy production
- Triggers natural repair and detoxification processes
- Stimulates stem cell production
- Reduces inflammation
- Supports normal cellular functions
- Enhances the body’s antioxidant capacity
- Improves stress resilience
- Stimulates body fat loss
- Strengthens immune system defenses
One of the most powerful benefits of fasting is autophagy, also referred to as the body’s internal housekeeping system.
During autophagy, the body clears out malfunctioning proteins and regenerates new, healthy ones, which can help improve various physiological functions, including metabolic processes, enzyme activity, and nerve signal transmission.
Many people fear that fasting leads to muscle loss. However, the opposite is true. Fasting triggers the release of human growth hormone (HGH), which helps preserve muscle mass and promotes fat burning instead of protein breakdown.
Watch the video below to learn more about dry fasting and its potential health risks.
Dry fasting vs. water fasting
Let’s take a look at the differences between dry fasting and water fasting.
What is dry fasting?
Dry fasting, also known as absolute fasting, involves abstaining from both food and all fluids, including water.
Soft dry fasting allows external use of water for activities like washing or brushing teeth, while hard dry fasting avoids any contact with water entirely.
Ramadan is a well-known form of dry fasting observed for spiritual reasons, during which individuals refrain from food and water from sunrise to sunset.
While this practice is rooted in religious tradition, a study published in the Journal of Research Medical Science revealed several health advantages of this fasting method.1
Potential health benefits of Ramadan fasting include:
- Lower inflammatory markers
- Increased production of immune-supporting white blood cells
- Enhanced digestive system health
- Better metabolic health
- Improved microbial gut diversity
- Fewer markers of oxidative stress
- Lower risk of chronic diseases
What is water fasting?
A water fast, also known as a wet fast, involves consuming only water. While water fasting shares many of the same potential benefits as dry fasting, it can also pose risks, especially when combined with poor dietary habits.
“Modern diets are often depleted of essential vitamins and minerals,” explains Dr. Berg. “This leaves many people with low nutrient reserves, which can become a concern during fasting, as the body still requires minerals to function properly.”
Water allows you to fast for longer periods, but may still lead to electrolyte loss, dehydration, and nutrient imbalances.
Research published in the National Library of Medicine found that participants practicing an eight-day water fast experienced several health improvements. However, they also had significant reductions in calcium, sodium, magnesium, and potassium, four key electrolyte minerals.2
The dangers of dry fasting and water fasting
Fasting offers several health benefits, but there are potential risks to consider, particularly for those with poor nutritional status or certain health issues.
Common fasting-related side effects include weakness, digestive issues, and fatigue. Prolonged fasting for more than 48 hours can increase the risk of fainting, dehydration, electrolyte imbalances, and abnormal heart rhythms.
To minimize the risks of side effects, it’s recommended to start with intermittent fasting routines and gradually increase the duration. Begin with a 24-hour fast, then extend it to 36 hours after a few weeks.
Long periods of dry fasting are especially dangerous as they can lead to severe dehydration, electrolyte deficiencies, and other life-threatening complications.
Water fasting, while slightly safer, can still result in mineral imbalances and dehydration. Always listen to your body and consult a healthcare professional before undertaking prolonged fasting.
Furthermore, prolonged fasting isn’t recommended for pregnant or breastfeeding women, nor for individuals looking to gain weight. Fasting during these times can also disrupt essential nutrient intake, which is vital for both maternal health and proper growth and development.
Importance of replenishing nutrients for safe fasting
When fasting, it’s essential to nourish your body with the vitamins, minerals, and essential nutrients it needs to function optimally, especially during prolonged fasts.
A nutrient-dense diet, such as Healthy Keto®, ensures the body can sustain prolonged fasting periods and maintain energy levels.
Homemade vegetable broth is an excellent way to provide your body with vital minerals while fasting.
Simmering vegetables and spices such as kale, Swiss chard, celery, parsley, onion, garlic, leeks, cabbage, and turmeric for 90 minutes allows the minerals to break down into the liquid, creating a rich, nourishing broth.
Drinking about 2.5 liters of vegetable broth daily during a fast can help replenish minerals, curb your appetite, and support your weight loss goals.
Green tea is also beneficial, offering antioxidants and supporting steady energy levels, helping to maintain focus and vitality without breaking the metabolic fasting state.
Additionally, avoid breaking your fast with a large meal. Instead, gradually reintroduce food to prevent refeeding syndrome, a potentially dangerous condition that can occur when food is reintroduced too quickly after prolonged fasting.
Refeeding syndrome can lead to rapid shifts in electrolyte and fluid concentrations, which may cause symptoms such as weakness, fatigue, and even heart problems in severe cases.
A healthy, nutrient-dense diet before and after fasting helps ensure your body receives the nutritional support it needs for optimal health and safe fasting practices.
Key takeaways
Dry fasting and water fasting are distinct approaches. While dry fasting involves complete abstinence from both food and water, water fasting allows the intake of water.
Both fasting methods offer potential health benefits, but can also lead to risks such as dehydration and nutrient imbalances, especially during prolonged fasting periods.
To safely fast, it’s essential to maintain a nutrient-dense diet and replenish lost minerals with a homemade vegetable broth to support the body’s nutritional needs during prolonged fasting periods.
FAQ
1. What is water fasting?
Water fasting involves refraining from consuming any food or beverage except water for an extended period of time.
2. What is dry fasting?
Dry fasting involves abstaining from both food and water. In a hard dry fast, all water use is avoided, including for activities like brushing teeth or washing hands. A soft dry fast permits the use of water for hygiene purposes but restricts all fluid intake.
3. Why shouldn’t you dry fast?
Dry fasting can lead to severe dehydration, electrolyte imbalances, and potential organ damage due to the lack of water intake. Prolonged dry fasting increases the risk of weakness, fainting, dangerously low blood pressure, and other potentially life-threatening complications.
4. How many hours can you do dry fasting?
Prolonged dry fasting should be limited to no more than 24 hours to avoid serious health risks. Shorter, intermittent dry fasting periods are generally more beneficial and safer for overall health.
5. Is dry fasting more beneficial?
Dry fasting can offer benefits, such as enhanced detoxification and improved metabolic health, but these advantages are most noticeable during shorter fasting periods.
Prolonged dry fasting carries significant risks, including dehydration and electrolyte imbalances, making it less beneficial for extended durations.
6. What are the dangers of water fasting?
Even water fasting can lead to dehydration and electrolyte imbalances, especially during extended fasts. Prolonged fasting without proper nutrient intake can cause weakness, dizziness, and other serious health issues.
7. What are the dangers of dry fasting?
The dangers of dry fasting are similar to those of water fasting, with an added risk of severe dehydration. Without water and proper mineral reserves, dry fasting can lead to weakness, dizziness, and digestive problems.
8. How long can I do water fasting?
Water fasting can typically be done for up to 48 to 72 hours, but it’s important to listen to your body and stay hydrated throughout the process. Longer fasts should only be done under medical supervision to avoid serious health risks like dehydration and nutrient imbalances.
9. Can dry fasting make you dehydrated?
Prolonged dry fasting can lead to dehydration due to the complete absence of water intake. To minimize this risk, it’s important to limit the duration of dry fasting.
10. Should I drink water while fasting?
Yes, adequate water intake is crucial while fasting to prevent dehydration and maintain proper bodily functions, including energy production and overall health and well-being.
11. Can you lose weight by dry fasting?
Yes, dry fasting can lead to weight loss. However, the risks of dehydration and nutrient imbalances make it a less safe option for sustainable weight loss.
12. Can a dry fast damage your kidneys?
Yes, prolonged dry fasting can potentially damage the kidneys due to the lack of water intake, which is crucial for kidney function.
Dehydration increases the risk of kidney stones and may lead to kidney strain or failure over time if fasting is extended.
13. Why is my urine yellow while dry fasting?
During dry fasting, your urine may become yellow due to dehydration, which concentrates the waste products in your urine and darkens its color.
14. Can I have lemon water while water fasting?
Yes, lemon water is safe during water fasting, as it contains minimal calories and helps support hydration without breaking the metabolic fasting state.
15. Can I drink water while doing intermittent fasting?
Yes, water can be consumed during intermittent fasting as it contains no calories and helps maintain hydration. In fact, drinking water is essential to prevent dehydration while fasting.
Sources
- https://pmc.ncbi.nlm.nih.gov/articles/PMC4274578/ ↩︎
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8369953/ ↩︎
