The Skin-Gut Axis Explained: An Evidence-Based Guide for Health Professionals
- Marcelline Goyen
- Jul 30
- 3 min read
New to the skin-gut axis? This guide explains the core concepts and provides links to more in-depth articles throughout this website.
By Marcelline Goyen, BSc Dermal Therapist, Skin-Gut Axis Specialist & Author Published: July 30, 2026
Table of Contents
How the Skin-Gut Axis Works
Healthy skin is influenced by far more than topical skincare alone. Growing scientific evidence shows that the gut and the skin continuously communicate through immune, metabolic and neuroendocrine pathways. This communication network is known as the gut–skin axis. The skin-gut axis describes how nutrition, digestion, the microbiome, intestinal barrier function, immune activity, stress physiology, lifestyle habits and topical exposure interact to influence skin physiology. As a BSc Dermal Therapist, I focus on the educational and physiological aspects of this connection, without offering medical diagnosis or treatment.
I explore each of these pillars in depth throughout my articles and in the chapters of my textbook series, offering healthcare professionals clear, evidence‑informed insights into the complex communication between the gut and the skin.
Below is a brief overview of the core pillars that shape the gut–skin relationship.
Key Pillars of the Skin-Gut Axis
Pillar | What it Represents | How it Relates to Skin Physiology |
Diet | The quality and composition of daily nutrition | Influences inflammation, lipid balance and nutrient availability for barrier repair |
Digestion | Functional breakdown and absorption of food | Affects how nutrients, enzymes and metabolites support skin structure |
Microbiome | Diversity and balance of gut microorganisms | Communicates with the immune system and impacts systemic responses |
Intestinal Barrier | Integrity of the gut lining and mucosal defense | Helps regulate inflammatory signaling that can influence the skin |
Immune Regulation | Coordination of immune pathways | Shapes how the body responds to internal and external triggers |
Stress Physiology | Neuroendocrine responses to psychological and physical stress | Affects motility, secretion and immune activity along the gut–skin axis |
Lifestyle | Sleep, movement, hydration and daily habits | Influences systemic inflammation, recovery capacity and skin barrier function |
Topical Exposure | Contact with irritants, skincare vs skin pH, and environmental factors | Interacts with systemic processes through the skin barrier |
A Clear, Educational Takeaway
The skin-gut axis is not a single mechanism but a network of interconnected systems. When these systems function well together, the skin is better able to maintain balance, barrier integrity and resilience. When they are under strain, the skin may become more reactive. Understanding these interactions helps professionals and clients make informed decisions about skin health from a broader, integrative perspective.
Important Note
This information is intended for educational purposes only. If you experience persistent or concerning skin or digestive symptoms, always consult a medical doctor or qualified healthcare professional.
Scientific References & Source Material
Zhao Y, Yu C, Zhang J, Yao Q, Zhu X, Zhou X. The gut‑skin axis: Emerging insights in understanding and treating skin diseases through gut microbiome modulation (Review). Int J Mol Med. 2025 Dec;56(6):210. doi: 10.3892/ijmm.2025.5651. Epub 2025 Oct 3. PMID: 41041846; PMCID: PMC12494302. PubMed
Mahmud MR, Akter S, Tamanna SK, Mazumder L, Esti IZ, Banerjee S, Akter S, Hasan MR, Acharjee M, Hossain MS, Pirttilä AM. Impact of gut microbiome on skin health: gut-skin axis observed through the lenses of therapeutics and skin diseases. Gut Microbes. 2022 Jan-Dec;14(1):2096995. doi: 10.1080/19490976.2022.2096995. PMID: 35866234; PMCID: PMC9311318. Pubmed2
Further Reading & Blogs
Goyen MTM. (2019) The Skin-Gut Connection (Dutch) Volume I
Goyen MTM. (2023) The amazing world of the Skin-Gut Axis, including the role of the Microbiome Volume II
Blog: Healthy Skin Begins in the Gut: Why Short-Chain Fatty Acids Matter in the Skin-Gut Axis
Blog: The Gut-Skin Axis Explained: How a Leaky Gut Triggers Skin Inflammation
⚖️ Medical Disclaimer: The information provided on this website, including articles, textbook references, and educational materials, is for informational and educational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or another qualified healthcare provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.
Marcelline Goyen, BSc | Dermal Therapist & Author (The Netherlands)
Founder of www.skin-gut-axis.com
About Marcelline Goyen, BSc Marcelline Goyen, BSc is a Dermal Therapist (non-practicing), professional educator, and author specializing in the complex mechanics of the skin-gut axis. With more than two decades of clinical experience and multiple textbooks dedicated tot the topic, she focuses on translating complex science into practical education for healthcare professionals. To make her specialized knowledge more widely accessible, her expertise has culminated in the publication of two books, which have since become fundamental literature for holistic skin rehabilitation. Alongside her writing, she shares her insights globally through masterclasses and webinars. Discover more about her books and clinical vision at www.skin-gut-axis.com.
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