Extended healing fasts (14-40 days)

Why in the world would you ever want to fast for two weeks or more?

If only a tiny percentage of people in the Western world ever undertake a water fast of any kind, then only a tiny percentage of people who water-fast will ever undertake an extended healing fast of 14 days or more. Why? There’s simply no need. For everyday cleansing and healing, occasional 7-10 day fasts combined with regular short fasts such as the one-day (36-hour ) water fast should keep you in excellent health.

Benefits of extended water fasts (14-40 days):

However, in order to reach the deepest possible level of healing and reap the greatest benefits, it is necessary to dig deeper with a longer fast. For instance, certain serious physical illnesses – those often deemed incurable by Western medicine – require the cleansing of an extended fast in order to permanently heal. Despite what allopathic doctors may tell you, conditions as wide and varied as Type II diabetes, multiple sclerosis, chronic high blood pressure, autoimmune disorders, as well as certain types of tumors are all potentially curable. Yes, these illnesses and many more can be healed permanently through water fasting. As a water fasting coach, I’m privileged to witness this miraculous healing potential of the human body!

Beyond physical healing, the deepest spiritual cleansing can similarly take place only through the sheer length of an extended fast. Although nowadays we tend to remember only the Biblical 40-day fasts of Moses and Jesus, the fact is that many spiritual traditions over the millennia have demanded 40-day water fasts. Even Pythagorus required potential students to undertake a 40-day fast before he was willing to accept them. As much as we balk at the idea of giving up food for such a long time, it’s mostly just a question of unwillingness to forgo the addictions and pleasures of life. Don’t believe the voice of your fears and reluctant ego. You won’t starve to death. Unless you’re seriously malnourished and underweight to begin with, you carry the better part of 100,000 calories on you, locked in your fat tissue and waiting to be released through ketosis. That’s enough to last you well over 40 days. If you’re overweight, you could potentially fast for much longer (although in most cases this is not advisable).

Experiencing a healing crisis:

Although in one respect an extended fast simply continues the notion of a 7-10 day water fast, it is also much more powerful because it gives you the opportunity to experience deeper ‘healing crises‘. As described in the article on the 7-10 day water fast, a healing crisis often occurs towards the end of the first week of water fasting, as the symptoms of old illnesses, injuries and traumas resurface, before being permanently expelled from your body. A similar process often occurs around the end of the second week of fasting – and this is the reason that if you decide to extend a 7-10 day water fast, it’s worth aiming for at least 14 days. This second healing crisis tends to call forth deeper issues than the first healing crisis, or, alternatively, finishes resolving those issues which were not fully cleared during the first healing crisis. In other words, it’s from the beginning of the second week of water fasting that your body can begin to heal from more serious health issues. Simply, up until this point, your body has been cleansing the toxins of everyday life (and especially so if you haven’t been fasting regularly).

For the deepest and most serious health issues, whether physical or spiritual, healing crises often occur much later into the fast, whether 20, 30 or even 40 days. There’s no way to accurately predict when they will occur. You can only trust your body and let nature take its course…

Occasionally, healing crises can be extremely intense, especially when they occur late into a fast. When this happens, it’s critically important to be able to (continues below) tell the difference between a healing crisis and a sign from your body urging you to stop the fast. This is where working with an experienced water fasting coach can really help. If it’s a healing crisis, you should ideally try and push through. If it’s not, you should stop immediately!

Check out the webshop on waterfasting.org

The webshop offers downloadable fasting plans and guides to help make your water fast a success.

Not every healing is accompanied by a dramatic healing crisis. Sometimes symptoms of illness and trauma simply begin to disappear. In cases like this – when no clear sign indicates that you’ve obviously freed yourself from a health issue – it can be difficult to know when to end the fast. This is another reason why it’s advisable to consider conducting any extended fast under some kind of supervision: from (1) a fasting coach like myself and, ideally, also from (2) a medical doctor who understands water fasting. The other main reason for working with a professional is to make sure you don’t overstep your body’s nutritional capabilities, as a prolonged fast begins to reach its physical limits.

The dangers of fasting too long:

If you continue fasting indefinitely there comes a point where the fast turns into starvation. You obviously don’t want to overstep this mark! For when your fat stores are finally depleted, the body has no choice other than to devour muscle tissue, as well as feed from your inner organs. You’ll do yourself serious damage. Fortunately, though, the body sends a clear sign: extreme hunger. Although it’s unlikely you’ll miss this red flag, two other less obvious scenarios also demand the end of a fast – and it’s here, again, that fasting under supervision can help. The first possibility is that you run out of muscle tissue before you deplete your fat stores. In order to power your body as a whole, it’s true that ketosis is extremely efficient. The problem is that the brain demands another fuel entirely: glucose. And this cannot easily be metabolised from fat tissue. Instead, the body must extract it out of muscle. The second possibility is that you deplete your electrolytes (blood salts). Although unlikely, it’s extremely dangerous! For this reason it’s advisable to have your blood tested at relatively regular intervals after the first 7-10 days of fasting.

Refeeding:

After you break an extended fast, it’s extremely important to follow a well structured meal plan.

If you return too quickly to a normal diet, you risk encountering both digestive problems as well as ‘refeeding syndrome‘. This is a potentially fatal complication caused by the change from ketosis back to your everyday metabolism. After an extended fast, the body cannot be rushed in this process.

If you have any doubts, I offer a downloadable 67-page PDF which covers refeeding for any length of fast.

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230 responses to “Extended healing fasts (14-40 days)”

  1. I have a series of small nodules along both sides of my neck and in a few in the shoulders. They have been there for a few years and seem to be slowly getting bigger. I have had blood work and it comes back normal. I’m afraid it could be some type of slow growing tumor. I have been fasting for a week on just water. Can I get the same results of a 40 day fast if I would break it up into 2 sessions of 20 days or thee sessions of 14. If so how long should I wait between the fasts. Thanks Shannon

  2. Dear Dr. Barker – thank you for so generously sharing your expertise. I did a 10 day water fast a couple of months ago and felt fantastic, and am preparing to do an extended fast, possibly 40 days, as I find my life is stagnant, crisis after crisis, and I am about 25kg overweight, and I think it would be good for me on a mental, emotional, physical and spiritual level. I am taking medication (100mg or iu – not sure what the measurement is) per day for hypothyroidism. I want to know if I can stop taking it during the fast and if my measurements are on point after the fast, if I can come of it altogether? I really want to come off the meds as I believe they’re affecting my heart. Thank you in advance for your reply. Kind regards.

    1. Tallis Barker, D.Phil. Avatar
      Tallis Barker, D.Phil.

      Hi Lsilo,
      Thanks for writing. Glad you felt so good on your last fast, and I hope your upcoming extended fast continues your healing journey. I can’t comment on individual cases – and especially so when it comes to drugs – but I will say that I do work with numerous clients who do successfully and permanently come off hypothyroid meds during their fast. It’s a balancing act, and every case is different!
      All the best,
      Tallis

  3. I have fasted before, 3,5,10 and 13 days. When I did water only, after a few days, I get intense cramps in my calves. They are so bad that I sometimes scream and have to rub if for a very long time to ease it. They usually happen in the middle of the night and wake me causing me to sit straight up and scream and cry. When I use a small amount of Pink Hymalayan salt once of twice a day, it seems to ease this. Does that interfere with the detox?

    1. Tallis Barker, D.Phil. Avatar
      Tallis Barker, D.Phil.

      Hi Teri,
      Thanks for sharing. Cramps can have several causes: both dehydration as well as electrolyte issues involving magnesium and/or sodium. Taking pink Himalayan salt would certainly help the situation, given that it forces your body to hold on to additional water, but it does also lower the degree of cleansing and healing. So it’s important to understand the cause of the cramps before taking salt! If the issue was low sodium, then it’s the right solution. If the issue was caused by something else, then it acts only as a ‘band-aid’ which also comes at the price of compromising the deepest detox and healing.
      Hope this helps,
      Tallis

  4. Dear Dr. Barker,

    I am 42 yrs old and I just finished my 21 days of water wasting. I had almost no symptoms during fasting except fatigue and my post fasting blood test results are normal.

    However, I missed my period 6-7 days (not pregnant) and no premenopausal symptoms before. Is this normal during prolong fasting? I am worry that this prolong fasting put me in menopause. Is that possible?

    Thank you
    Eda

    1. Tallis Barker, D.Phil. Avatar
      Tallis Barker, D.Phil.

      Hi Eda,
      Thanks for sharing, and congratulations on finishing your 21-day fast. It’s very common for women to miss a period after an extended fast. However, this isn’t because there’s a problem. Precisely the opposite: when the body experiences the depth of cleansing on a 21-day fast, it often decides there’s no need to produce the cleansing force of a period in the immediate aftermath. For the vast majority of women, fasting actually improves any symptoms of (peri)menopause, such as reducing or eliminating hot flashes, and, in my experience, it is probably the best means for maintaining continued good hormonal health into older age. So there’s very little risk here of your fast actually accelerating your trajectory into menopause!
      All the best,
      Tallis

      1. Thank you so much Dr. Barker,
        it makes sense. I actually got my period period back yesterday.

        Gratefully
        Eda,

        1. Tallis Barker, D.Phil. Avatar
          Tallis Barker, D.Phil.

          Glad to hear that Eda, and thanks for the update 🙂
          Tallis

  5. Hello Tallis, I am on day four of a water fast. I was wondering what your thoughts were on herbal teas, specifically hibiscus? I’ve read that it won’t affect autophagy, but wondering what your thoughts are on the subject? Thank you!

    1. Tallis Barker, D.Phil. Avatar
      Tallis Barker, D.Phil.

      Hi Naomi,
      Thanks for writing. There’s definitely a place for herbal teas, including hibiscus – and no, they don’t affect autophagy. More importantly, though, is understanding WHY you’re using them. Is it for their medicinal value? Is it because you’re bored by drinking only water? I’d always argue that the more conscious you are about the motivations and feelings guiding you while you fast, the deeper your experience will be!
      Hope this helps,
      Tallis

  6. Hi Tallis, I’ve read about liver cleansing/flushing (see: Andreas Moritz “The Amazing Liver and Gallbladder Flush”) for years (have never been able to successfully get anything out) and the stones that people say are flushed out of their livers after doing these flushes. Does anything similar happen during a water fast? Is the liver healed from something like fatty liver disease after a water fast?

    1. Tallis Barker, D.Phil. Avatar
      Tallis Barker, D.Phil.

      Hi Chris,
      Thanks for sharing. My experience is that the ‘Amazing liver and gallbladder flush’ produces results for some people and not for others. I’d say that the best thing you can do for your liver is to do a water fast instead :-). Yes, I’ve frequently seen fatty liver disease healed. A couple of years ago, for instance, I had a client who had over 50% fatty liver and fully healed from it on a 21-day fast.
      All the best,
      Tallis

  7. Thank you very much for the article. Really useful read.

    Are there any conditions which from your experience and expertise almost always need longer than 21 days to heal? I’m trying to decide when to break my fast. Unfortunately, I don’t have a medically-tested understanding of my health problems, but I’m morbidly obese, have digestive issues and high blood pressure.

    1. Tallis Barker, D.Phil. Avatar
      Tallis Barker, D.Phil.

      Hi Dee,
      Thanks for writing. Determining the length of a fast is an important decision, and it’s often something which forms an a central part of a consultation when working with a new client. In my experience there are many health issues which usually require more than 21 days. Beyond certain specific issues – such as cancer and neurological issues – which almost always require 40 day fasts, it’s also a question of the number of issues burdening somebody’s health (including the determination of subclinical issues which don’t necessarily show up on tests), the strength of the person’s immune system, and the length of time the person has been burdened with ill health.
      Hope this helps,
      Tallis

  8. Hi Dr Barker, I’ve just discovered your website and am very intrigued, it’s difficult to get comprehensive information about extended fasts like this anywhere else online. I am wondering how long you would recommend fasting for covid vaccine injury (similar symptoms to long covid) and how much weight I should expect to lose in that time? (I need to put some weight on to facilitate the fasting!)
    Many thanks in advance 🙂

    1. Tallis Barker, D.Phil. Avatar
      Tallis Barker, D.Phil.

      Hi Cal,
      Thanks for writing. I’ve worked with numerous clients suffering from vaccine injury. What I can tell you is that fasting is probably the most powerful thing you can do to heal, but the exact protocol has to be tailor-made to the individual case: both in order to maximise efficacy as well as ensure the safety of the client. Many people suffering from Long Covid and vaccine injury are in a truly delicate state, and one of the hallmarks of fasting with any Covid-related issue is the likelihood of complications. It’s extremely important not to push the body beyond what it can manage, and especially so if you’ve already lost a lot of weight. If you need support, you can reach me via the coaching page of the website here: https://waterfasting.org/online-coaching-and-consultations-for-water-fasting/
      All the best,
      Tallis

  9. I’m so thankful for your article thank you. I had bronchitis and pneumonia last month and another bout of bronchitis this month. I decided to do a water fast and I’m on day four to see if I could help clear up whatever my body is dealing with. Would you recommend a seven, 14 or longer fast for deep healing? I’ve never been a smoker, but seem to have been pound to bronchitis and pneumonia for years.

    1. Tallis Barker, D.Phil. Avatar
      Tallis Barker, D.Phil.

      Hi Debby,
      Thanks for writing, and I’m glad you found this article helpful. There’s no question that water fasting is just about the most powerful thing you can do to heal from severe respiratory issues. It’s hard for me to recommend an exact length, as this depends on the individual case, but it’s true that you should probably be thinking of 21+ days if you want to get to the root of the problem. Located deep inside the body, the lungs require a deeply evolved fast to experience major healing – and this takes time.
      Hope this helps,
      Tallis

  10. Hi Tallis,

    I’ve been reading through your site for the past couple days and am inspired by your work. I actually stumbled upon your site after finding your article about a patient of yours who had a 17 cm cyst on her ovary (and also a fibroid). I was just told by a doctor that I had an 11 cm chocolate cyst on my right ovary and I want to try fasting to see if I can dissolve it. I initially thought of going with a 21-day fast like your patient, but I know my husband would freak out as he doesn’t want me fasting at all. So, I’ve concluded that a 14-day fast may be best. Just wondering your experience with women with cysts and if you think 14 days is enough? I don’t have any other cysts or health issues other than high blood pressure. My weight is normal for my size: 120lbs 5’3. I’m actually on day 4 currently. Any advice would be greatly appreciated! 🙂

    1. Tallis Barker, D.Phil. Avatar
      Tallis Barker, D.Phil.

      Hi Valerie,
      Thanks for writing. Glad to hear you’ve been inspired to fast to try and heal your own cyst. Regarding the number of days, 14 is going to go deep into detox, but whether or not it will have time to reach the cyst is something I wouldn’t want to speculate on. If this is your first-ever 14 days fast, the odds are that it probably won’t – but that doesn’t mean the fast is in vain. In order to reach the point where the cyst becomes your body’s prime target, you’re going to have to lower your overall toxic load first, and this is precisely where preliminary fasts can come in handy. When the longest fasts (which are usually the most efficient in dealing with serious issues) are out of the question because of family or work life, I often spend a lot of time working with clients in order to devise the most efficient fasting plan using a series of shorter fasts.
      All the best,
      Tallis

      1. Okay thank you Tallis!

  11. Frank John Kupferer Avatar
    Frank John Kupferer

    I just want to say thank you for this post, it really helped me a lot 🙂

    1. Tallis Barker, D.Phil. Avatar
      Tallis Barker, D.Phil.

      Hi Frank,
      Thanks for sharing, and very glad you found the article useful!
      All the best,
      Tallis

  12. Thank you for answering my questions in the past, Dr. Barker. I have many small issues that have accumulated over time and have been considering a coached extended fast to address all of these. Gallstones seem to be one of the issues. Do you think extended fasting would allow the body to break down gallstones and/or kidney stones? I deeply appreciate all you do.

    1. Tallis Barker, D.Phil. Avatar
      Tallis Barker, D.Phil.

      Hi Subdahl,
      You’re welcome! To answer your question, gallstones are produced in the liver and are delivered to the gallbladder and GI tract via the bile. Fasting detoxes the liver, which lowers the tendency to produce gallstones in the first place. Gallstones also have a tendency to be flushed out during a fast. In terms of kidney stones, a lot is going to depend on the specific type of kidney stone. Those which form from excess uric acid have a theoretical possibility of becoming exacerbated through the raised uric metabolites released through detox. However, in practice I have seen this happen only once in the last few years. Otherwise, it is more likely that a fast will help you to pass any kidney stones (assuming they are not already too large).
      All the best,
      Tallis

      1. Hi Tallis: Thank you very much for your service! I am on day 9 of a fast and have begun experiencing pain from passing gallstones (I know this pain from previous experience). Do you have any suggestions? Thank you again and take care
        Robert

        1. Tallis Barker, D.Phil. Avatar
          Tallis Barker, D.Phil.

          Hi Robert,
          You’re welcome – I’m glad you appreciate the website. I’m afraid it’s difficult to answer your question without having coached together. This is the kind of issue which all depends on context. If you’ve suffered from painful gallstones in the past, we would have looked at this during the pre-fasting consultation. I would have asked about your diet, taken a deeper look at your case history and, based on this, suggested a couple of protocols to reduce the chance of gallstone issues developing during the fast itself. Unfortunately, it’s much harder to mitigate the issue once the fast is already in full swing!
          Hope you’re feeling better by now,
          Tallis

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