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Can You Drink Water When Fasting

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Are Any Foods Or Drinks Allowed When You Fast

WATER FASTING: What else can you DRINK?

If youre told to fast, you shouldnt eat solid foods during that window of time. But can you drink water while fasting?

Because water and clear liquids are quickly absorbed by the stomach in a relatively short amount of time, patients are often allowed to drink clear liquids up to two hours before surgery, Dr. Wang says. Alcohol does not fall into this category and is off-limits while fasting. But sparkling water, mineral water, fruit juices without pulp, clear carbonated drinks , and clear tea are OK.

The lines drawn when you cannot see through the liquid, says Dr. Wang. Milk products have protein in them and that increases the time that the liquid spends in your stomach. The goal is to have an empty stomach immediately before surgery.

Although its not clear, black coffee is fine, too.

Dehydration And Drawing Blood

If you are dehydrated when the nurse or physician performs your fasting blood test, it can be difficult for them to draw blood from your veins. Drinking water makes your veins plump and easy to access. For this reason it as actually a good idea to drink water before your fasting blood test.

Can I Drink Water Before A Blood Test

Yes, you can drink water while fasting before a blood testin fact, drinking plenty of water can help ensure that you receive accurate test results. Dehydration can affect certain blood tests such as cholesterol, electrolyte and BUN tests. Be sure to stay hydrated before your test by drinking the recommended amount of water for your weight and activity level.

Also Check: What Can I Have While Intermittent Fasting

Intermittent Fasting For Beginners: The Ultimate 101 Guide

No other diet has experienced as much growth over the past few years as Intermittent Fasting.

The reason for this is effective weight loss, proven health benefits, and a simplified daily routine.

But the supposedly simple diet always raises questions when you start.

Thats why this ultimate intermittent fasting guide for beginners provides you with the framework that guarantees a smooth start.

What To Drink While Fasting

Can You Drink LaCroix (or Other Seltzer Water) While ...

We know that to get the full benefits of intermittent fasting, its better to keep off food, but what about drinks? What can you drink during intermittent fasting? Do you have to give up your morning coffee? Will it break your fast if you drink some bone broth? To fully understand what is acceptable and is not acceptable when fasting. We have to understand what exactly is fasting?

Please note that this post may contain affiliate links. You can read my full disclosure;here.

30-Page Fitness Printable Planner/Fillable Digital Planner.

Recommended Reading: How Is Intermittent Fasting Healthy

Keep Fasting Periods Short

When a Christian water fasts, they ate not eating any solid foods. Its important to know that if you are wanting to do this type of fast that you are in control of how long this fast should be.

Short fasts last from the time period of 8-24 hours. However, others decide to participate in a longer fast from 48-72 hours. You get to choose how long it should. If this is your first time fasting, it is highly recommended to not fast from both food and water for long periods of time.

There are other ways to fast as well such as technology, books, or something that you spend most of your free time enjoying. If you are interested in reading more about this type of fast read our blog How to Honor God With Your Fasting & 20 Tips for Beginners.

All These Fasting Tips Are Helpful But Im Still Not Sure I Can Do It How Can I Motivate Myself

Try reading my own journal from my first-ever 3-day fast. Id never even gone a day without food beforehand, so for me it was quite the experience. Your experience wont be exactly the same, but maybe reading how mine went will inspire you or at least make you curious enough to try.

Also take a look at my post on the surprising and motivating benefits of prolonged fasting.

Or, if youre tired of reading my writing and stupid jokes, this video that Kim forwarded me today is pretty motivating:

Recommended Reading: Can You Eat Anything While Intermittent Fasting

How Long Do You Have To Fast

For blood tests, youll often be asked to fast for eight to 12 hours prior to your appointment. Unless youre told otherwise by your doctor, avoid food and all drinks besides plain tap or bottled water, as caffeine, alcohol, and even carbonation can potentially impact certain blood test results.

The general rule for anesthesia used to be to avoid food or drink after midnight. But thats an arbitrary deadline, some doctors say, and guidelines have since changed.

Since there may be a change in plans, we often recommend a patient fast as of midnight the night before surgery, Dr. Pianko says. Technically, it only takes eight hours for the stomach to digest a full meal and much less for a light meal. But for the sake of consistency and to prevent confusion or misinterpretation as to what is a light meal as opposed to a full meal, we often recommend midnight as the cutoff point.

Why Is Fasting Required Before Blood Tests

Can You Drink TOO MUCH Water While Fasting?

Fasting before a blood test helps improve the accuracy and reliability of the test. Accurate test results are a critical component of diagnosing various health conditions and monitoring the effectiveness of treatment plans.;

Your diet contains a range of nutrients, including carbohydrates, proteins, fats, minerals and vitamins. When you eat and drink normally, those nutrients are broken down and absorbed into your bloodstream. This can impact the levels of those substances in the blood and skew lab test results.

For example, certain methods of diabetes testing measure the patients baseline blood sugar levels after a period of fasting. Eating directly before the test will cause the patients blood sugar to spike, leading to an inaccurate test result. The patient could be misdiagnosed with prediabetes or diabetes, unless their doctor recommends that they complete a second test.

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How Long Can A Human Survive Without Water

If youre committing to a hard dry fast, you may wonder why there are so many restrictions around this means of intermittent fasting. Its because the human body has far less tolerance for living without water than it does food.

Once deprived of water, you will live for about seven days, give or take. How long you may survive depends on how hydrated you were to begin with as well as the temperature of your current environment.

How Much Water Should You Drink In A Day

Some surveys suggest that while about 20 percent of our body water level comes from food , the remainder comes from liquids. Nevertheless, keep in mind that celery, watermelon, soups etc. quench your thirst, fill you up and deliver vital nutrients. This is why a higher intake of fresh fruit and vegetables equals a higher intake of water.

The body needs water for most of its functions. However, we are always involved in activities that make our bodies lose water. We lose water through our breathing, perspiration, urine, and bowel movement. In short, every metabolic reaction in the body leads to the loss of water. Since the body is made up of water, any loss of it needs to be replaced as often as possible for the body to keep functioning correctly. This is one of the reasons why it is usually encouraged to stay hydrated even if a person is fasting.

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Water Fasting May Worsen Several Medical Conditions

Although a water fast is relatively short, there are a few conditions that may be aggravated by water fasting.

People with the following medical conditions should not water fast without first seeking advice from their healthcare provider:

  • Gout. Water fasting may increase uric acid production, a risk factor for gout attacks (
  • ).


Although water fasting may have some health benefits, it comes with many risks and dangers. For example, water fasting could make you prone to muscle loss, dehydration, blood pressure changes, and a variety of other health conditions.

Like other types of fasting, water fasting can help you lose weight.

However, it comes with plenty of health risks.

If you want to reap the benefits of fasting but also want to lose weight, intermittent fasting and alternate-day fasting are probably more effective approaches.

These fasts provide similar health benefits but can be followed for much longer periods, as they allow you to eat food, decreasing the risk of nutrient deficiencies .


A water fast can help you lose weight, but other types of fasting can offer you the benefits of fasting and weight loss with fewer risks.

Reintroduce Foods After The Fast

Can You Drink Water During Intermittent Fasting ...

Once the chosen amount of time has passed, your fast is considered over. You got through your first water fast, so congratulations are certainly in order. Now that youre done consuming nothing but water, at least for the time being, you should not just jump right back into your old diet.

Well talk more about this later, but you want to begin reintroducing meals gradually. Just like you slowly erased parts of your diet, you can tack them back on in the days and weeks to come. In fact, you might not even start with a solid diet, but a liquid one consisting of vegetable and fruit juices. Then, within a few hours or even a day, you might upgrade to veggies and fruits, then more solid foods.

Its also recommended that you schedule an appointment with your doctor both ahead of your water fast. Taking certain medications may preclude you from water fasting, and you want to know that before starting. The same is true if you have one or more of these conditions:

  • Youre pregnant or were recently pregnant and still breastfeeding
  • Paralysis
  • Hypoglycemia
  • Bulimia, anorexia, or other eating disorders

After your intermittent fasting has wrapped up, see your doctor again just to check that your health is in the best shape it can be. Then, if you enjoyed the experience, feel free to try another water fast. With time, you can expand the length of your fast, working your way up weeks of water fasting.

Also Check: What To Eat After Fasting To Lose Weight

Detailed Questions For Fasting

Below are some frequently asked questions regarding fasting. Continue to see if your wanted answers are covered.

1. Can I Drink Water When Fasting?

Yes, you can. It is perfectly okay to drink water when fasting. Actually, it is the only thing you can take into your body during the fasting period. Additionally,water intake can make you feel better during the fast and the blood drawing will be easier. Blood contains 50% water, so with enough fluid in your system, your veins will be more readily available and the lab tech will have an easier time taking out the blood.

Two related question:

  • Can I drink juice? No, only water can be consumed during a fast.
  • Can I drink coffee? No, you should not drink any kind of coffee or tea during the fasting period.

2. What Is the Duration of Fasting?

Before having blood sugar drawn or a lipid profile, your doctor will have you fast for as long as 8 hours. Yet, your doctor may have different instructions regarding fasting for you and you should follow the recommendations whenever possible.

You can have something to eat or drink as soon as the blood is drawn. So, it is best to bring a snack along with you. Also, it is a better idea that you appoint the blood test in the morning so that you will spend the most time of fasting while sleeping.

3. Should I Continue Medications When Fasting?

4. More Facts You Should Know

There are several questions you may have besides “can I drink water when fasting?” These include the following:

Trying To Calorie Restrict During The Eating Window

One of the main issues that some people face when they start IF is that they continue to calorie restrict when they have broken their fast. The whole point of eating in this way is to listen to your body and start eating until you feel full. Your body is an amazing machine, if you allow it to do its job properly. Your body will release hormones to make you feel full when it knows its had enough food. If you calorie restrict during your eating window you may well end up under eating which causes lots of unwanted changes in the body, and long term is not good for you.

Read Also: What Are Intermittent Fasting Hours

How To Keep Muscle While Water Fasting

If you recall from earlier in this guide, we mentioned that part of the weight you lose during a water fast is from lost muscle mass. While you may want to slim down during your fast, you dont want your well-defined muscles to disappear. How can you maintain your musculature while dropping pounds, too?

According to this article from Peter Attia, hes fasted for a week at a time and did daily resistance training to keep his muscle mass. Attia mentions that when our bodies make more ketones, we also increase our production of beta-hydroxybutyrate or BOHB, an organic compound that can get valine, isoleucine, and leucine moving in our systems. These are amino acids with a branch chain that maintain our lean tissue and protein levels.

Now, you may wonder how on a water fast your body can do anything with your muscle protein, especially synthesizing it. The answer lies in the boost of hormones we get from intermittent fasting, namely adrenaline and growth hormone. At the same time, our glucose and insulin levels deplete.

The autophagy and fat oxidation that occurs spares our muscles. This is because, when fasting, our body knows that were starving. It may preserve our muscle cells compared to other cells with a faster turnover.

Drinking Salt & Other Minerals Makes Fasting Easier

WATER FASTING NO NO (don’t drink this while water fasting)

In addition to the smallish benefits you can get from vinegar, tea, or other drinks listed above, there are also some drinks that make fasting A LOT easier.;;

The biggest one?

Anything with lots of SALT .

This is especially relevant for prolonged, multi-day fasting. But getting enough salt can also be helpful during short-term fasting, or even when you eat a ketogenic diet.

To understand why, keep reading.

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What Should You Not Do Before A Blood Test

Why do I need to fast before my blood test? If your health care provider has told you to fast before a blood test, it means you should not eat or drink anything, except water, for several hours before your test. When you eat and drink normally, those foods and beverages are absorbed into your bloodstream.

Procedures With A General Anesthetic

If youre heading to surgery, your healthcare professional will prob have you fast for 8 to 12 hours. A research review showed that you might be able to drink water when fasting for a surgery, but no closer than 2 hours before. Again, this can vary depending on your situation. So, check with your healthcare professional if youre unsure.

Longer, more invasive procedures typically use general anesthesia, like:

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What Type Of Tests Or Surgeries Require Fasting

Any procedure that requires anesthesia, including local anesthesia and general anesthesia requires fasting.

There are often pre-surgery tests, Dr. Wang says, which may also require fasting. Your doctor will advise you about all procedures and tests that require a certain window of avoiding food and most drinks.;Beyond that, it is best to just follow a balanced, nutritious diet prior to surgery and follow fasting instructions, Dr. Wang says.

Certain procedures or tests have their own set of specific fasting instructions or prep, such as for a colonoscopy. You will usually be asked to fast before general blood tests because lipid tests, which measure triglycerides in the blood require fasting. Theyre part of a normal cholesterol screening. Blood glucose tests also require fasting.

Again, your surgeon or doctor will provide situation-specific guidance.

How Much Water Should You Drink Before A Blood Test

How Fast Can You Drink A Bottle Of A Water Challenge ...

Ideally, start drinking more fluids the day before your blood draw, and continue to drink water before you have your blood drawn. Excessive amounts arent necessary; most sources ecommend that an adult drink 64 ounces of water per day for good health, which is more than adequate for having your blood drawn.

Also Check: How Does Intermittent Fasting Cause Weight Loss

The Benefits Of Intermittent Fasting

Just like with other types of fasting, intermittent fasting triggers the same metabolic processes in the body which have been reported to improve overall health and longevity.

Dietitian Rachael Link lists the most common benefits of fasting that can improve your health. Looking at matters from a research-based perspective, she concludes that fasting can help with the following:

Promoting Blood Sugar Control

Fasting decreases insulin resistance, which is a state where the cells stop responding to insulin correctly and, in turn, the blood sugar levels rise. As a result of fasting, your bodys sensitivity to insulin returns to normal levels and it can collect and store glucose more efficiently.;

Some studies also connect fasting to a lowered risk of diabetes. Accordingly, some health practitioners utilize fasting as a means to lower blood sugar levels among diabetic patients. However, you should note that the effects in this regard differ between men and women.

Fighting Chronic Inflammation

Researchers have found that intermittent fasting helps to lower and normalize the levels of immune cells, while also controlling proinflammatory cytokine levels. This is especially useful in the treatment of inflammatory conditions, such as multiple sclerosis.

Improving Heart Health, Blood Pressure, Triglycerides, and Cholesterol Levels

Boosting Brain Function and Preventing Neurodegenerative Disorders

Helping with Weight Loss

Increasing Growth Hormone Levels

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