This second book (2023), written by skin therapist BSc Marcelline Goyen, is about the fascinating collaboration between the skin and the intestines. The book explains in practical and understandable language how these two organs are connected and how they influence each other, among other things, through our microbiome, the immune system, lifestyle, and nutrition. More information about this Dutch book and also Goyen's first book 'De huid-darm connectie' (2019) can be found at her Dutch website www.huid-darm.nl.

"You get drawn into the story as a reader," was said about her smooth writing style.

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This book describes the topics from her first scientific book about the skin-gut axis (2019) in a more lighthearted way (2019), but now supplemented with practical examples, illustrations, practical tips, and general advice, a mini-course on 'reading your own stool', and possible solutions through nutrition and intestinal therapy. This makes the book suitable for everyone, including laypeople and people with skin problems, who are interested in the relationship between the skin and the intestines and the role of our microbes, nutrition, and lifestyle. This gives the reader more insight into the development and approach to (their) skin problems. This book has also been translated into English (2024) and German (2025).