To meet the expectations and needs of my clients, I offer individual consulting, group workshops, in-company workshops, scientific & medical information and articles & reviews writing.


  • Functional Medicine (read more about functional medicine approach here)
  • General and Family Nutrition
  • Gut Health, Probiotics, Prebiotics, Dietary Supplementation
  • General Health Complaints (such as digestion problems, acne, allergies, eczema, digestion problems, irritable bowel syndrome, thyroid problems, tiredness, migraine, low immunity, stress-related complaints, poor sleep, PMS, depression, anxiety, ADHD, ADD, insulin resistance, weight issues, joint pain, and other chronic complaints)
  • Interpretation of fecal microbiome results from MyMicroZoo
  • Laboratory testing, such as fecal test analysis (digestion profile, basic gut microbiota, intestinal permeability/leaky gut marker, reactivity to gluten, histamine, parasitology, Helicobacter pylori, Candida overgrowth, intestinal inflammation & infection markers, tumor markers, pancreatic elastase and bile production), blood testing (routine blood testing, SKB blood test, food sensitivities, allergies), saliva testing (adrenal stress index), hair analysis (heavy metals, minerals), genetic testing, DNA methylation profile. Client covers the costs of laboratory tests.

Most laboratory testing is requested via MGLab&Advies (fecal analysis), Atalmedial (blood analysis), RP Sanitas Humanus (saliva, blood, fecal, urine analysis), ProHealth (saliva, blood, fecal, urine analysis), and 23andMe or New Life Genetics for genetic analysis.

Why should you consider laboratory testing?

If you struggle with chronic health complaints, appropriate laboratory testing may be essential in order to assess your health status and reveal possible underlying cause(s) contributing to your symptoms, as well as to prepare an appropriate treatment plan. The testing depends on the patient and his/her needs, what they’re looking for, and what we need to find out. For example, a well selected blood panel will provide information about how the basic body systems are functioning. These should be crucial for everybody with chronic health issues. On the other hand, a fecal analysis provides different information about the health of the patient, assessing patient’s gut health which is the key to health. If you don’t have a healthy gut, you can’t be healthy overall. This is true even when you don’t have gut symptoms. Importantly, lab testing is only one tool in evaluating your health, as your health history, signs and symptoms are equally important. All of that when put together will help to develop a proper action plan to your recovery. Medical laboratory testing plays a crucial role in the early detection, diagnosis and treatment.

Nutritional and supplementary advice is based on individual needs and on the principles of the orthomolecular science.


It’s very important for me that my patients feel at ease and that we have a quality time for thorough conversation, during our first appointment. I am eager to hear patient’s input, ideas and I want their motivated participation. Please note that the best results can be expected when the patient does  actively participate in changing his behavior, diet, and lifestyle. When dealing with chronic disease, I focus on patient’s foundation – meaning diet, lifestyle and environment. We also look into possible nutrient imbalances, gut health, the functioning of HPA axis (hypothalamic pituitary adrenal axis). Depending on the individual case, we may look further into cellular dysfunction, toxic burden, hormonal imbalance, or chronic infection/immune dysregulation.

1st (Intake) consultation and 2nd consultation: the first consultation plays a vital part in your health journey. Prior to our first appointment I will ask you to complete health related questionnaires and I will ask you to send in any recent medical records you may already have. During the intake consultation we will discuss your health challenges, what you have tried so far, what’s worked and what hasn’t worked, and what your wishes are. We will talk about your diet, your life style, and we will also evaluate the questionnaires. We will gather all the clues of your past (health history starting from birth, your physical and emotional childhood environment, your relationships, traumatic events, etc.) and your present situation (stress level, nutrition, social life, relationships, physical activities, quality of sleep, symptoms, environmental toxins). Depending on the nature of your complaints, I may suggest doing laboratory testing to better evaluate your current health status and to better understand the possible root cause contributing to your health issues. Based on the findings of laboratory results, prior the 2nd consultation, I will provide you with a personalized dietary and supplementary plan to address your health issues. We will discuss the recommendations during our 2nd consultation (via Skype, phone or face-to-face).

Follow-up consultations: a number and a frequency of follow-up consultations is individual. Some people need more follow-ups whereas others are satisfied after 1-2 consultations. For chronic and more complex complaints regular follow-up consultations over a period of few months may be the most beneficial.

MyMicroZoo related consultations: if you are interested in learning about your gut (fecal) microbiome you can order a test kit via the MyMicroZoo website and I can help you to translate the results into the nutritional support for your health and your microbiome health.  


Functional medicine, with its emphasis on preventing and reversing disease rather than just suppressing symptoms with medication, can potentially save patients a lot of money over the course of their life, often proving more cost-effective than conventional medicine. The costs in conventional medicine may not be visible to the patient, since his insurance company deals with the bill, but that does not mean that the costs are not real – and it does not mean the patient isn’t paying for them in some form via insurance premiums, taxes and out-of-pocket expenses. When seeking functional medicine care, in the beginning the out-of-pocket expenses may be higher because of the testing, preventative care, diet and lifestyle intervention which is an invest in patient’s health. And like with other good investments, patients will receive a return over time. The costs of my consultations, depending on the insurance package, may (partly) be reimbursed by a health insurer (in the Netherlands). To make sure, check it out with your health insurance company.

Individual Consultations & Consult Items

Discovery Call of max. 20 min: FREE

  • To find out how I work and if I can help

1st (intake) face-to-face consultation of max. 75 min: 145€

  • Includes Brief summary (in English) of the intake consult (sent by email) with suggested laboratory testing, possible factors contributing to your symptoms, and general tips
  • General nutritional guidelines (in English) received after intake and sent by email
  • Indirect time spent on activities prior and after consultation such as review of medical records, email communication

2nd consultation to discuss your treatment plan of max. 75 min: 145€

  • Personalized dietary and supplementary plan (in English) based on laboratory results and your complaints, sent by email after all laboratory results are available
  • 2nd consultation takes place via Skype, phone or face-to-face
  • Indirect time spent on activities prior and after consultation such as review of medical records, email or phone communication

MyMicroZoo results consultation (virtual via Skype or phone) of 30 min including interpretation of MyMicroZoo fecal microbiome results and written (in English) nutritional recommendations: 145€

Follow-up/progress consultations (Skype, phone or face-to-face) of max. 45 min including new recommendations and indirect time spent on consultation related activities: 90€

Email/telephone general short queries (appointment, invoice, etc): FREE

Email/telephone specific queries (supplementation, nutrition) 10 min: 20€

Request & interpretation of blood, fecal, saliva, hair or urine tests*, general genetic test* interpretation (New Life Genetics): 40€ per test/analysis

Genetic testing* analysis (such as 23andMe data): Interpretation of genetic profile (single nucleotide polymoprhism of MTHFR, COMT, MAOA, GST and other genes) with recommendations: 150€ per test

General Information consultations of max. 60 min (about nutrition, supplements, probiotics, prebiotics, gut health etc.): 90€

Expert Content consultations & reviews – please contact me for more information

*Client covers the costs of laboratory tests. The costs vary depending on the test and the lab, and may range from 100€ up to 1000€ or more, for more comprehensive testing. For example, the basic fecal analysis costs approximately 200 – 260€. The routine blood test costs about 50-200€.

Please note that all prices are inclusive VAT (21%)

Consultations take place in Amsterdam or virtually.

Please contact me at if you have any questions or if you want to discuss any other tailor made services.

Health Insurance Reimbursement

Dr. Joanna is registered as a paramedical natural medicine practitioner at the professional association BATC (Stichting Belangen Associatie Therapeut en Consument) and her clients are eligible to health insurance reimbursement, however it varies per insurance company and individual package. Please check with your insurer if you are entitled to it. You may also check here to find out which insurance companies provide reimbursement for complementary health practices. Consults fall under “Natuurgeneeskundige therapieën/consulten”.

Registration details: Practitioner AGB code: 90103189; Practice AGB code: 90062583;  BR code: 02537

ProBiotic DIGEST Appointment Cancellation Policy

  1. If for any reason you wish to cancel your appointment, you can do it without charge anytime 24 hours prior your appointment
  2. Same day cancellations will be charged 50% of the scheduled service price
  3. If you do not cancel your appointment or do not show up for your scheduled appointment, you will be charged full price for the scheduled service.

The General Data Protection Regulation (GDPR)


ProBiotic DIGEST holds some information about you. This document outlines how that information is used, who we may share that information with and how we keep it secure. This notice does not provide exhaustive detail. However, we are happy to provide any additional information or explanation needed. Any requests for this should be sent to the

What We Do

ProBiotic DIGEST provides natural medicine therapy services to clients to improve their health through diet and lifestyle interventions.  We focus on preventative healthcare, the optimization of physical and mental health and chronic health conditions.  Through therapy consultations, dietary and lifestyle analysis and laboratory testing, we aim to understand the underlying causes of your health issues which we will seek to address through personalized dietary therapy, nutraceutical prescription (supplements) and lifestyle advice.  In addition, we also provide workshops and educational seminars.

How We Obtain Your Personal Data

Information provided by you

You provide us with personal data in the following ways:

–       By completing a health questionnaire

–       By signing a terms of engagement form

–       During a therapy consultation

–       Through email, over the telephone or by post

–       By taking online payment 

This may include the following information:

–       basic details such as name, address, contact details and next of kin

–       details of contact we have had with you such as referrals and appointment requests

–       health information including your previous medical history, dietary, lifestyle, supplement and medicine details, health test results, clinic notes and health improvement plans

–       GP contact information

We use this information in order to provide you with direct healthcare.  This means that the legal basis of our holding your personal data is for legitimate interest. 

Following completion of your healthcare we retain your personal data for the period of 15 years. This enables us to process any complaint you may make.  In this case the legal basis of our holding your personal data is for contract administration.

Information we get from other sources

We may obtain sensitive medical information in the form of test results from laboratory testing companies.  We use this information in order to provide you with direct healthcare.  This means that the legal basis of our holding your personal data is for legitimate interest.   

We may obtain sensitive information from other healthcare providers. The provision of this information is subject to you giving us your express consent. If we do not receive this consent from you, we will not be able to coordinate your healthcare with that provided by other providers which means the healthcare provided by us may be less effective.

How we use your personal data

We act as a data controller for use of your personal data to provide direct healthcare.  We also act as a controller and processor in regard to the processing of your data from third parties such as testing companies and other healthcare providers.  We act as a data controller and processor in regard to the processing of credit card and online payments.

We undertake at all times to protect your personal data, including any health and contact details, in a manner which is consistent with our duty of professional confidence and the requirements of the General Data Protection Regulation (GDPR) concerning data protection.  We will also take reasonable security measures to protect your personal data storage.

We may use your personal data where there is an overriding public interest in using the information e.g. in order to safeguard an individual, or to prevent a serious crime.  Also where there is a legal requirement such as a formal court order. We may use your data for marketing purposes such as newsletters but this would be subject to you giving us your express consent.

Do you share my information with other organizations?

We will keep information about you confidential. 

We may share your anonymous information with supplement companies and biochemical testing companies as part of providing you with direct healthcare.  We will not include any sensitive information. We will only disclose your sensitive information with other third parties with your express consent.

We will seek your express consent before sharing your information with your doctor or other healthcare providers. However if we believe that your life is in danger then we may pass your information onto an appropriate authority (such as the police, social services in the case of a child or vulnerable adult, or doctor in case of self-harm) using the legal basis of vital interests.

We may share your case history in an anonymised form with our peers for the purpose of professional development.  This may be at clinical supervision meetings, conferences, online forums, and through publishing in medical journals trade magazine or online professional sites.  We will seek your express explicit consent before processing your data in this way.

What are your rights?

Every individual has the right to see, amend, delete or have a copy, of data held that can identify you, with some exceptions. You do not need to give a reason to see your data.

If you want to access your data you must make a subject access request in writing to Under special circumstances, some information may be withheld.  We shall respond within 20 working days from the point of receiving the request and all necessary information from you.  Our response will include the details of the personal data we hold on you including:

–       Sources from which we acquired the information

–       The purposes of processing the information

–       Persons or entities with whom we are sharing the information

You have the right, subject to exemptions, to ask to:

·         Have your information deleted

·         Have your information corrected or updated where it is no longer accurate

·         Ask us to stop processing information about you where we are not required to do so by law or in accordance with the BATC guidelines.

·         Receive a copy of your personal data, which you have provided to us, in a structured, commonly used and machine readable format and have the right to transmit that data to another controller, without hindrance from us.

·         Object at any time to the processing of personal data concerning you

We do not carry out any automated processing, which may lead to automated decision based on your personal data.

If you would like to invoke any of the above rights then please email Joanna Krzeslak-Hoogland at ProBiotic DIGEST at

What safeguards are in place to ensure data that identifies me is secure?

We only use information that may identify you in accordance with GDPR. This requires us to process personal data only if there is a legitimate basis for doing so and that any processing must be fair and lawful.

Within the health sector, we also have to follow the common law duty of confidence, which means that where identifiable information about you has been given in confidence, it should be treated as confidential and only shared for the purpose of providing direct healthcare. We will protect your information, inform you of how your information will be used, and allow you to decide if and how your information can be shared.

We also ensure the information we hold is kept in secure locations, restrict access to information to authorised personnel only, protect personal and confidential information held on equipment such as laptops with encryption (which masks data so that unauthorised users cannot see or make sense of it). We ensure external data processors that support us are legally and contractually bound to operate and prove security arrangements are in place where data that could or does identify a person are processed.

How long do you hold confidential information for?

All records held by the ProBiotic DIGEST will be kept for 15 years.


If you have a complaint regarding the use of your personal data then please contact us by email and we will do our best to help you.


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