My Approach
You Are Not a Broken Machine
Conventional medicine excels at diagnosing disease and managing symptoms. What it rarely asks is the deeper question: why is this happening, and what does the body need to restore itself?
My approach starts there.
The human body is not a collection of parts that wear out and need replacing. It is a highly ordered, self-regulating energy system — one that is continuously reading signals from its environment, converting those signals into biology (orchestrated information flow), and repairing and regenerating itself when given the right conditions. Most chronic illness, including cancer, metabolic disease, and neurodegeneration, is not a failure of the body. It is a failure of the conditions the body needs to function.
My work is to identify what those conditions are for you — and to help you restore them.
The Energetics of Health Framework
Every cell in your body is responding to five environmental signals at all times:
Light · Water · Magnetism · Temperature · Time
These signals are received and converted into biology (orchestrated information flow) by four molecular systems we call the four receivers: melatonin, melanin, membranes, and mitochondria. Between the environment and these receivers sits a layer of ionic minerals — sodium, potassium, magnesium, iron, copper, zinc, iodine, calcium, molybdenum, manganese, selenium, boron and more — that conduct, translate, and amplify every signal before it reaches your cells.
When any part of this system is disrupted — by artificial light, contaminated water, electromagnetic pollution, nutritional depletion, high deuterium, chronic stress, or circadian misalignment — the entire architecture is affected. Not just one organ. Not just one hormone. The whole system.
This is why people with complex, chronic conditions often find that single-target treatments produce only partial and temporary results. They are treating downstream effects while the upstream signal environment remains broken.
What a Consultation Looks Like
Every person I work with is different. Your diagnosis, history, goals, environment, and biology are yours alone — and your plan reflects that.
A consultation begins with a thorough review of your medical history, current symptoms, labs, imaging, and any prior treatments. I look not just at what the numbers say, but at the patterns — what the body is trying to tell us about where the system is under stress.
From there, we build a plan organized around the framework above. This typically includes:
Consciousness and resilience — the internal landscape matters as much as the physical environment; stress physiology, autonomic nervous system coherence, and the evidence base for spontaneous healing are integrated into every plan.
Who I Work With
I work with individuals navigating complex, serious health challenges — particularly those who feel they have exhausted conventional options, are looking for a more complete picture alongside their medical care, or want to take an active role in their own recovery.
My clinical focus includes:
I work alongside your existing medical team — not in place of it.
The Philosophy Behind the Practice
Modern medicine inherited a model of the human body from 19th-century physics: a machine made of parts, governed by chemistry, understood by taking things apart. That model has produced remarkable tools. It has also produced a blind spot — it struggles with complexity, with emergence, with the body as a field rather than a mechanism.
The science has moved. Quantum biology, biophysics, and the study of coherent systems have given us a far richer understanding of how living organisms actually function. Light does not just cause sunburn — it governs metabolic rate, hormonal signaling, and gene expression. Water is not just a solvent — it is a structural and energetic medium whose quality determines the quality of every cellular process. Minerals are not just nutrients — they are ionic conductors that translate electromagnetic signals into biological action.
This is not alternative medicine. It is a more complete physics applied to biology — one that takes the body seriously as the sophisticated, self-regulating system it is.
My aim is to bring that understanding to you in a way that is practical, personalized, and grounded in the best available evidence — and to walk alongside you as you rebuild the conditions your body needs to do what it already knows how to do.
Dr. Petra Davelaar is an integrative health practitioner specializing in oncology, metabolic health, and advanced diagnostic interpretation. She consults internationally with individuals and works alongside conventional medical teams to develop comprehensive, individualized health strategies.
Click here to inquire about a consultation
You Are Not a Broken Machine
Conventional medicine excels at diagnosing disease and managing symptoms. What it rarely asks is the deeper question: why is this happening, and what does the body need to restore itself?
My approach starts there.
The human body is not a collection of parts that wear out and need replacing. It is a highly ordered, self-regulating energy system — one that is continuously reading signals from its environment, converting those signals into biology (orchestrated information flow), and repairing and regenerating itself when given the right conditions. Most chronic illness, including cancer, metabolic disease, and neurodegeneration, is not a failure of the body. It is a failure of the conditions the body needs to function.
My work is to identify what those conditions are for you — and to help you restore them.
The Energetics of Health Framework
Every cell in your body is responding to five environmental signals at all times:
Light · Water · Magnetism · Temperature · Time
These signals are received and converted into biology (orchestrated information flow) by four molecular systems we call the four receivers: melatonin, melanin, membranes, and mitochondria. Between the environment and these receivers sits a layer of ionic minerals — sodium, potassium, magnesium, iron, copper, zinc, iodine, calcium, molybdenum, manganese, selenium, boron and more — that conduct, translate, and amplify every signal before it reaches your cells.
When any part of this system is disrupted — by artificial light, contaminated water, electromagnetic pollution, nutritional depletion, high deuterium, chronic stress, or circadian misalignment — the entire architecture is affected. Not just one organ. Not just one hormone. The whole system.
This is why people with complex, chronic conditions often find that single-target treatments produce only partial and temporary results. They are treating downstream effects while the upstream signal environment remains broken.
What a Consultation Looks Like
Every person I work with is different. Your diagnosis, history, goals, environment, and biology are yours alone — and your plan reflects that.
A consultation begins with a thorough review of your medical history, current symptoms, labs, imaging, and any prior treatments. I look not just at what the numbers say, but at the patterns — what the body is trying to tell us about where the system is under stress.
From there, we build a plan organized around the framework above. This typically includes:
-
Environmental calibration — how you manage light, water, EMF exposure, and temperature in daily life
-
Circadian alignment — bringing your daily rhythm back into sync with biological time
-
Nutritional strategy — food quality, timing, and metabolic flexibility; always local, seasonal, and low in the environmental contaminants that interfere with cellular chemistry
-
Targeted therapeutic support — a minimal, purposeful selection of agents (such as astaxanthin, lactoferrin, iodine, ionic minerals, marine plasma, and deuterium-depleted water) chosen for their specific biophysical roles, not as broad-spectrum supplementation
-
Metabolic reset protocols — fasting, fasting-mimicking diet, cold and heat therapy, grounding, and photobiomodulation used as active physiological tools
Consciousness and resilience — the internal landscape matters as much as the physical environment; stress physiology, autonomic nervous system coherence, and the evidence base for spontaneous healing are integrated into every plan.
Who I Work With
I work with individuals navigating complex, serious health challenges — particularly those who feel they have exhausted conventional options, are looking for a more complete picture alongside their medical care, or want to take an active role in their own recovery.
My clinical focus includes:
-
Cancer (integrative oncology support, pre- and post-treatment optimization)
-
Metabolic dysfunction (insulin resistance, obesity, fatty liver, type 2 diabetes)
-
Neurological and neurodegenerative conditions
-
Chronic inflammatory and autoimmune disease
-
Hormonal dysregulation and thyroid conditions
-
Complex cases where no single diagnosis fully explains the picture
I work alongside your existing medical team — not in place of it.
The Philosophy Behind the Practice
Modern medicine inherited a model of the human body from 19th-century physics: a machine made of parts, governed by chemistry, understood by taking things apart. That model has produced remarkable tools. It has also produced a blind spot — it struggles with complexity, with emergence, with the body as a field rather than a mechanism.
The science has moved. Quantum biology, biophysics, and the study of coherent systems have given us a far richer understanding of how living organisms actually function. Light does not just cause sunburn — it governs metabolic rate, hormonal signaling, and gene expression. Water is not just a solvent — it is a structural and energetic medium whose quality determines the quality of every cellular process. Minerals are not just nutrients — they are ionic conductors that translate electromagnetic signals into biological action.
This is not alternative medicine. It is a more complete physics applied to biology — one that takes the body seriously as the sophisticated, self-regulating system it is.
My aim is to bring that understanding to you in a way that is practical, personalized, and grounded in the best available evidence — and to walk alongside you as you rebuild the conditions your body needs to do what it already knows how to do.
Dr. Petra Davelaar is an integrative health practitioner specializing in oncology, metabolic health, and advanced diagnostic interpretation. She consults internationally with individuals and works alongside conventional medical teams to develop comprehensive, individualized health strategies.
Click here to inquire about a consultation
Learn about my approach and what to expect here.
COMMUNITY
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ACADEMIC RESEARCH
In 2024 Petra joined Neo7 Biosciences as an investigator for their personalized pooled peptide therapies.
In addition, she is an invited reviewer for several scientific periodicals, including Scientific Reports, a Nature group research journal, as well as Medical Oncology and Metabolomics, both Springer journals.
POST-GRADUATE COURSEWORK
In 2022 she was Certified Mold-Literate after completing the practitioner program by Dr. Jill Crista.
In 2020 she became a Terrain Based Treatment™ Certified Practitioner and completed the Mistletoe Therapy & Integrative Oncology Course 2020 organized by the Physicians’ Association for Anthroposophic Medicine (PAAM)
In 2019, she successfully completed the Root Cause Protocol Practitioner training.
In 2017, Dr. Petra completed the Dale Bredesen’s ReCODE program, Reversing Cognitive Decline Advanced Clinical Training by the Institute for Functional Medicine (IFM), now offered and managed by Apollo Health.
On May 8, 2017 Dr. Petra became an Institute of Functional Medicine Certified Practitioner.
ACADEMIC RESEARCH
In 2024 Petra joined Neo7 Biosciences as an investigator for their personalized pooled peptide therapies.
In addition, she is an invited reviewer for several scientific periodicals, including Scientific Reports, a Nature group research journal, as well as Medical Oncology and Metabolomics, both Springer journals.
POST-GRADUATE COURSEWORK
In 2022 she was Certified Mold-Literate after completing the practitioner program by Dr. Jill Crista.
In 2020 she became a Terrain Based Treatment™ Certified Practitioner and completed the Mistletoe Therapy & Integrative Oncology Course 2020 organized by the Physicians’ Association for Anthroposophic Medicine (PAAM)
In 2019, she successfully completed the Root Cause Protocol Practitioner training.
In 2017, Dr. Petra completed the Dale Bredesen’s ReCODE program, Reversing Cognitive Decline Advanced Clinical Training by the Institute for Functional Medicine (IFM), now offered and managed by Apollo Health.
On May 8, 2017 Dr. Petra became an Institute of Functional Medicine Certified Practitioner.
Networks
Dr. Petra has professional relationships with the Oncology Association of Naturopathic Physicians, and completed certification in educational programs by Dr. Nasha, Dr. Jill Crista, and the RCP.
OTHER PUBLICATIONS
Petra is a long-time passionate cook. In 2020, her daughter, Sophia, self-published a cookbook, P’s Cookbook. The book contains forty-six meals and dishes Petra made and recorded while Sophia was growing up. Copies are no longer available.