Welcome:
Do you offer excellent skin treatments,
but sometimes with insufficient results?
The skin-gut-axis explains why some skin treatments don’t truly “take effect”
— and how insight into the gut and microbiome can make the difference.
Our Skin Gut Axis Bookshop offers scientifically proven insights
for doctors and therapists who want to look beyond the skin.
20+ Years Experience
Evidence-Based Approach
Worldwide Recognition
Would you like to improve your skin treatments?
Do you want to offer your clients both immediate and long-lasting results for their skin health?
Why high-quality skin treatments sometimes still fall short
You work carefully. You take time with your patients. You apply evidence-based skin therapies. And yet… Some skin conditions keep returning.
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Eczema that improves but never truly stabilises.
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Acne that responds temporarily, only to flare up again.
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Rosacea, sensitivity, chronic inflammation — despite good care.
Does this sound familiar?
The external treatment fails!
Do you also find it frustrating to keep treating the same skin problems, knowing that your treatments only work temporarily and your client keeps coming back? Do you sometimes feel discouraged because you just can’t figure out why your skin treatment isn’t having the desired effect? Have you perhaps felt for some time that there might be ways to address skin problems ‘at the root,’ but you’re not sure how or where to start?
The skin rarely tells the whole story
In daily practice, it becomes increasingly clear:
many patients with skin complaints also struggle with:
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digestive and gut-related problems
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fatigue, brain fog or burnout
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stress, hormonal imbalance or mood disturbances
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food intolerances or long-term medication use
You may already sense that these complaints are interconnected — but how do you link them in a scientifically sound way?
The skin–gut axis: the missing link
Skin health is not determined by external factors alone.
What happens inside the body — especially in the gut — directly affects:
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the skin microbiome
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the skin barrier and pH
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inflammatory activity
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the skin’s capacity to repair and recover
Disruptions of the gut microbiome — caused by diet, stress, intolerances or medication (such as antibiotics, antidepressants or NSAIDs) — may prevent even the best external skin treatments from truly “landing.”
From symptom management to understanding root causes
When you learn to view the skin in relation to the gut, the microbiome, lifestyle and stress, space is created for:
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deeper and more meaningful anamnesis
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clearer explanations for recurring skin conditions
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more realistic expectations for patients
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more sustainable, long-term treatment outcomes
Not by treating more — but by understanding more deeply what the skin needs to heal.
The Skin–Gut Axis books
In my books, I guide you through the skin–gut axis —
holistic, scientifically substantiated and clinically applicable.
Written for:
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physicians
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skin therapists
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dietitians
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(para)medical healthcare professionals
Whether the skin–gut connection is new to you
or you already work with it and seek deeper insight —
these books help you recognise connections that enrich and strengthen your treatments.
"Healthy skin is not created from the outside alone
— but primarily from within!"
95%
Client Satisfaction
Would you like to achieve results like this?
Skin-gut practical example: seborrhoic eczema (76-year-old man)
When a 76-year-old man with gluten intolerance suddenly developed severe seborrheic eczema all over his body, the dermatologist told him it was a chronic condition he would simply have to live with.
After I conducted a thorough case history, I discovered that his intestines were also significantly disturbed. With intestinal therapy, he recovered within a month! This case is discussed in Chapter 1 of my second book (available in Dutch, English, and German). It explains how his stool pattern led me to the underlying cause, how I collaborated with his general practitioner, and what the outcome of the intestinal therapy was.
Would you like to learn what you can do when faced with a skin condition like this?
Every person is unique, and so are the causes of every skin problem. In my books on the skin–gut axis, I teach you how to look at the skin from a different perspective, ask different questions, and include bowel function and lifestyle in your search for underlying causes.
This approach enables you – with or without the cooperation of other doctors and therapists – to identify potential root causes and find effective solutions, as happened with this patient.
Be inspired by the new, scientifically grounded knowledge and the many real-life case studies described in the second Skin–Gut book (2023).
Would you like to achieve results like this?
Skin-gut practical example: severe eczema (18-year-old woman)
An 18-year-old woman who had suffered from severe chronic eczema for many years asked her dermatologist whether her intestinal problems (frequent diarrhea) could be related to her skin condition. The dermatologist denied any connection. In the end, however, recovery was possible — thanks to intestinal therapy.
This case is described in Chapter 1 of my second book (available in Dutch, English, and German). It explains how she came to me, what I observed and thought, which therapies I applied, what worked immediately (and what didn’t yet), and what ultimately led to her recovery.
Would you like to learn what you can do when faced with a skin condition like this?
By learning and understanding how our skin and its microbiome interact with the intestines and the gut microbiome, you will begin to look at the skin in a completely new way — and discover alternative solutions: sometimes through a different skincare approach, a modified diet, or by avoiding a food allergen. Sometimes it involves eliminating an intestinal pathogen (parasite, yeast, etc.) and/or restoring the gut microbiome. And sometimes, you may uncover other (mental) stress factors that can be addressed.
The Skin–Gut Books available on this website will help you gain new insights. Let yourself be inspired!
We share knowledge, so your care can reach further than ever.
Why should you deepen your knowledge about the skin-gut connection?
The skin and the intestines are closely linked and constantly interact with each other. In science, this relationship is referred to as the gut–skin axis. An imbalance in gut health can manifest in numerous physical and mental symptoms, as well as in skin conditions such as acne, eczema, rosacea, and premature skin aging. For health professionals who work with clients suffering from skin problems, understanding this connection is essential. It allows them to address skin issues at their root cause and achieve long-lasting results.
Do you share our dream?
It is our dream to contribute worldwide to improving the health of people with skin conditions, by sharing our knowledge about the skin–gut axis and our microbiome with health professionals like you.
What you can learn from our books?
In our scientifically grounded books, you will discover how gut health, the microbiome, nutrition, and lifestyle can all influence the skin — and how to apply this knowledge in practice. You will finally truly understand the skin and, through a playful yet insightful “stool-reading course,” learn what bowel movements can reveal about skin health. Thanks to numerous real-life case studies, the complex theory is immediately brought to life in practical examples. You may even start recognizing similar patterns from your own clients’ case histories. As you read, you will expand your expertise and be able to offer your clients a holistic approach to restoring skin health — on the path to a healthy skin and a healthy gut.
Who is the author of the skin-gut books?
The books we offer are all written by Marcelline Goyen, BSc Skin Therapy, the Dutch pioneer in the field of the skin-gut axis, with over 20 years of practical experience in her own skin therapy practice in the Netherlands. Her books have made a significant contribution in the Netherlands and Belgium to raising awareness of the skin-gut axis and the role of our microbiome in health and disease. Or, as Marcelline prefers to say: "the role in balance versus imbalance!" Her motto is: "It's all about balance!"
My Mission
My mission is to contribute to a healthier world by sharing knowledge about the skin-gut axis and the human microbiome. Thanks to my books, other healthcare professionals like you can quickly integrate this knowledge into your practice, allowing you to help your clients with skin problems even faster and more effectively, by nourishing the skin not only from the outside but also from within by gut therapy, a healthy diet and lifestyle. This way, you too can contribute to my mission of making people around the world even healthier!
"Healthy skin comes from both the outside and the inside!"
Over time, the Skin-Gut Axis Bookshop has grown into a well-known digital bookstore and a popular destination for customers from various healthcare backgrounds and the general public. This bookstore is unique in its kind and subject matter (the skin-gut connection) and is therefore an absolute must-see for anyone who wants to delve deeper into the skin and its relationship with the gut, our diet, and lifestyle.
Take advantage of our scientifically proven books today and be amazed by the remarkable connection between skin, gut, and our microbiome.
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Our favorite quote
"Knowledge is power, sharing knowledge is strength!"