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Hello. I’m Dr. Tallis Barker

In addition to the many articles and videos here on this website, I also provide more private and personalised support as a water fasting coach.*

I’ve successfully guided over 700 hundred people from across the world through fasts of 3 to 40 days.
See the Testimonials below.

Some people need accountability.
Some people need a partner to keep them company through their journey.
Some people need the security of working with an expert, especially when fasting to heal health problems.

You can find all sorts of answers on internet forums – but are they right for you?

Whatever your needs, I’m here to help hold the space for your fast.

I offer the following online services:


Preliminary video call (WhatsApp, Telegram, Skype) before the beginning of the fast (@60 min.)

Daily check-in video calls for the full duration of the fast and refeeding process: (15-20 min. every day except Wednesdays and Sundays; live chat texting on Wednesdays; day off on Sundays).Beyond our regularly scheduled calls, I am always available every day via video call to discuss urgent issues.

Additional unlimited email/texting for the full duration of the fast, to cover any issues which arise between our video calls.

Access to my personal phone number in case of emergency.

+ 3 free PDFs:

Products and Procedures to ensure your Comfort and Safety
How to Break a Water Fast and Manage Refeeding
Dealing with Detox Symptoms


Before the fast:
Once you’ve filled out the sign-up form (by clicking one of the buttons on this page), I’ll contact you in order to set up a preliminary video call. Ideally, this should be at least a week before you plan to begin your fast. That way we can talk about how best to prepare for the fast, both physically and psychologically, as well as discuss any concerns you may have (also taking into consideration any relevant medical issues, if any).

During the fast:
Once you actually begin your fast, we’ll stay in contact via daily video calls in which you can let me know how you’re doing, and I can offer suggestions to any problems you may be having: anything from detox symptoms to sleep problems to cravings for food. The simple fact is that most people do encounter difficulties while water fasting. A recent study by the National Institutes of Health (2018) showed that over 89% of people experienced some kind of adverse event during their fast, ranging from mild to severe.** Having an experienced water fasting coach can help you avoid or reduce the severity of such problems! Once things are going smoothly, I can also offer tips to help you go deeper into your fast, both emotionally and spiritually.

In addition to our daily video calls, you’re free to send me unlimited emails about any issue you’d like to share. In case of emergency (which is highly unlikely!), you’ll also have my personal telephone number.

After the fast:
For many people, the refeeding process after their fast is the trickiest period: both in terms of resisting the temptation to overeat, as well as in making sure you don’t overload your digestive system. We’ll stay in contact via video calls and email until both of us are confident that you’re back on course to your everyday diet.


A single consultation via video call is suitable for general advice about fasting or the planning of a specific fast and/or diet plan. Price includes an internet video call (60 min. via WhatsApp, Telegram or Skype), plus follow-up emails relating to the given issue.

A single consultation is also the place to start if you’d like full water fast coaching, but aren’t sure how long you want to fast. In this case, our video call will help you decide. Afterwards, you can convert to full coaching by simply paying the difference in fees for whichever length of fast you choose.


3-day water fast: $200

5-day water fast: $250

7-day water fast: $300

10-day water fast: $375

14-day water fast: $475

21-day water fast: $650

28-day water fast: $800

30-day water fast: $850

40-day water fast: $1000

Other lengths of fast: price to be agreed

* Price includes both the fast and refeeding period afterwards
** 20% discount for students, the unemployed and those on social security, applicable to fasts of 14 days and longer


  1. Please fill out the Sign up Form below or click on one of the sign-up buttons above.
  2. I will reply by email (usually within 24 hrs) in order to set up a time for a video call.
  3. Follow the instructions regarding payment by debit/credit card. Payment is due before our (first) video call.


*Please note: I am not a medical doctor and do not offer medical supervision for any fast. I encourage those with medical issues to seek advice from a qualified M.D., in parallel with my own knowledge and experience as a fasting guide.