About

Our Mission is to reveal the deeper, often overlooked emotional and psycho-spiritual roots of cancer, and support a path to healing that begins within. We believe that true prevention and reversal of disease arise not from treating symptoms, but from understanding the messages our bodies carry and restoring connection to self.

We are committed to helping individuals reconnect with their authentic emotions, grow through life’s challenges with resilience, and live in alignment with their needs and inner truth. By bringing this awareness to light, we aim to shift the global conversation around cancer from fear and survival to healing and transformation.

Through our training programs, we cultivate skilled, heart-centered coaches who are guiding humanity toward a healthier, more conscious future - a world where cancer is no longer a mystery, but a message that leads to awakening and healing.

When you grow through life or health challenges, you claim not only your health and happiness, but gain priceless wisdom and strength which cannot come any other way. Becoming empowered from within is what self-healing is all about.

aul Leendertse is the author and pioneer behind The Root Cause of Cancer, with over 16 years of dedicated experience exploring the link between psycho-emotional stress and the development of cancer.

Over the course of a decade, Paul gathered rare knowledge by working closely with individuals with cancer (often late stage cancer) in three-week residency settings - with great success. With his clients he examined lifestyle factors, and emotional challenges and made profound observations: Every time a clear and consistent pattern of unresolved emotional stress, trauma, and life challenges preceded his clients cancer diagnoses, and when those stressful factors were resolved successfully, his clients cancer disappeared. From this lived experience Paul developed a concise methodology rooted in his theory that a “psycho-emotional stress complex” underlies cancer and must be addressed for true healing to occur.

Paul’s online Root Cause Assessment helps clients clearly identify the deeper emotional factors linked to their cancer or other disease, and map out a path for resolution, transformation, and healing. Often clients report significant shifts and decrease in symptoms - emotionally and physically - after just one session, and many clients have healed their cancer through the Root Cause Work.

Over the years Pauls work has evolved into a practical approach to healing from within taught in Root Cause Institute's two online programs: The Root Cause Course Level 1+ 2 and the Accelerated Self-Healing Course (ASC); Level 1+2 trains students to support others in their healing-from-within journey. The ASC is designed specifically for individuals navigating cancer. Both courses include his 15-Step Real-Self Healing Process along with additional advanced tools for self-healing.

Enroll in Root Cause Institutes programs or schedule a Root Cause Assessment to be on the forefront of Root Cause Healing.

Co-Founder

Aria's journey into holistic health and Root Cause Healing began through personal transformation. For many years, she faced addiction, chronic health challenges, and emotional distress. When conventional approaches offered limited answers, she made a profound shift - choosing to focus on self-love, inner healing, and personal growth. This decision was the beginning of a deep healing and awakening journey, which led to the reversal of her symptoms, renewed vitality, and a sense of lasting inner peace she hadn't known before.

This experience ignited her deep passion for holistic health and understanding and resolving the root cause of illness. She spent years studying and practicing a wide range of healing modalities, including Emotional Healing and Bodywork in Switzerland, Holistic Lifestyle Coaching with the CHEK Institute in California, Yoga and Thai Yoga Massage in India, and other mind-body-emotion disciplines.

In 2019, Aria met Paul Leendertse and began supporting his immersive 3-week Self-Healing Retreats in Canada. Two years later, they co-founded Root Cause Institute - an online school dedicated to the emotional and psycho-spiritual foundations of illness and healing. Today, Aria co-teaches the Root Cause Courses and works directly with clients, offering Root Cause Assessments and supporting those who are ready to heal from within.

"In 2010 my step father who was like a father to me died of lung cancer. He died in my arms.

I was a holistic lifestyle coach at that time, and he was receptive to my advice. He tried a variety of approaches I suggested: organic food, juicing, supplements, meditation and more. He also worked with Naturopaths using alternative approaches to combatting cancer. Additionally, he tried traditional treatments: radiation and surgery.

Nothing was working.

Although many of these approaches had minor positive effects (the traditional ones had obvious negative effects too), over time, I watched my step dad worsen. When he died, I realized that what I knew about health was not enough.

From that moment on I devoted my life to discovering the Root Cause of Cancer. I could not learn much from books, because what I needed to know was not yet discovered. I could not learn much from science and research because the majority of research is conducted on cancer cells in a lab, not individuals in real life.

I did real research with real people; my clients, devoted to self-healing were my teachers. Over 10 years of working with cancer patients in personal settings, I came to understand the root cause of cancer - it is repressed and unprocessed emotional stress or pain that is held inside a person's body.

I learned not only the Root Cause, but further, the specific cause of cancer in each region of the body. It was revealed to me over and over again, from different clients with the same cancer who had similar life stresses.
It is because of my clients, and their honest desire and commitment to looking deeper into self-healing that this knowledge can now reach the world."

Frequently asked questions

With RootCauseInstitute you will have the opportunity to learn from over 15 years of research into the lives of individuals with cancer - You will be learning from Paul Leendertse directly, the Pioneer of the Root Cause of Cancer.

Although our trainings are designed for professionals, no previous experience is required. A variety of people from all walks of life take Root Cause Practitioner 1:

• Stay at home mom's who want to raise healthy, cancer free children
• Individuals who want to understand and support their friends or family members, diagnosed with cancer
• Professionals of any kind such as Physio Therapists, Medical Doctors, Health Coaches etc.

What is most important is that you are passionate about this knowledge.

Paul is a very skilled teacher.

No. Helping Clients reverse significant disease and cancer requires a variety of skills that take time to understand, practice and develop, thus Root Cause Pracitioner 1 is a pre-requisite for Root Cause Practitioner 2.

The course material is designed to prepare you step by step to become skilled in holding space for, supporting, and guiding clients through their self-healing process.

Our Spiritual Laws Course is available entirely recorded, you can start studying at any time.

Our Trainings for Prevention and Reversal of disease and cancer are held live, multiple times throughout the year.
See upcoming dates:
Root Cause Practitioner 1
Root Cause Practitioner 2

Medical Doctors, Oncologists, Nurses and Naturopaths are taking this training in ever growing numbers, significantly expanding their knowledge and skill for supporting and guiding individuals to complete their self-healing.

See Testimonials here

In our trainings you will not learn how to heal your clients but rather how to help your clients access their innate ability to heal themselves, and guide them effectively. The only long-term healing is self-healing.

A variety of individuals with cancer have taken this Training. 80% have reversed their cancer by applying the material learned in the course.
See Testimonials here

Note: If you do have cancer, Paul recommends prioritizing his Mentorship over taking Root Cause Practiotioner 1. The mentorship contains more customized guidance and 1:1 support.

Yes. Our Trainings in Root Cause Identification and Resolution contain invaluable knowledge and tools not found anywhere else.

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Bringing the Root Cause of Cancer to the world.

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About the Founder

Co-Founder

Paul's Story

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Frequently asked questions

What can you offer that I cannot get anywhere else?

Do I need previous experience?

Can I start with Root Cause Practitioner 2 ?

When can I start studying?

I am a Medical Doctor or other Medical Professional, will I benefit from this Course?

Can I heal someone when I take this course?

If I have cancer, will I benefit from taking this course?

I am a highly skilled professional who has already taken a large amount of courses - will I still benefit from your trainings?

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