Why is the skin microbiome more important than we think?
For years, we believed that healthy skin was simply clean skin.
Today, we know that isn't entirely true. An entire microworld—composed of billions of microorganisms such as bacteria, fungi, viruses, and mites—lives on the surface of our skin, collectively forming the skin microbiome.
While these microorganisms were once viewed merely as inhabitants of the skin, modern dermatology recognizes them as active guardians of its health.
Your skin is never alone. It functions as a complex ecosystem in which every species plays a role. When this ecosystem is in balance, the skin is more resilient, calmer, and healthier. When that balance is disrupted, the risk of various dermatological problems increases.
Skin is not sterile – and that is its advantage!
At first glance, it might seem surprising that healthy skin is not sterile. In fact, sterile skin would be far more susceptible to infections and inflammation.
The microbiome acts as a natural protective layer that interacts with our immune system on a daily basis. Beneficial microorganisms occupy space on the skin's surface, produce antimicrobial substances, maintain pH levels, and prevent the overgrowth of potentially harmful bacteria. It is a sophisticated natural defense system that operates continuously—even when we are unaware of it.
What is dysbiosis?
The term "dysbiosis" refers to an imbalance in the microbiome. It can be caused by numerous factors:
- excessive skin cleansing
- harsh cosmetic products
- frequent use of antibiotics
- chronic stress
- UV radiation
- air pollution
- hormonal changes
- inadequate skin care
When beneficial microorganisms lose their protective role, certain species begin to dominate. This results in the onset or worsening of various skin conditions.
The microbiome and common dermatological diseases
Modern research shows that changes in the composition of the microbiome play a significant role in the development of numerous skin conditions.
In the case of acne, the crucial factor is not merely the presence of the bacterium Cutibacterium acnes, but the balance between different strains of this bacterium and other members of the microbiome.
In atopic dermatitis, there is often an overgrowth of Staphylococcus aureus bacteria, which further compromises the skin barrier and intensifies inflammation. In the case of rosacea, research is investigating not only changes in the skin's bacterial community but also the role of *Demodex* mites and their interactions with the immune system.
We will discuss the balance between specific microorganisms—upon which skin health depends—in greater detail in upcoming posts as part of our "Derma-Guide" series.
The future of dermatology is personalized.
Until just a few years ago, dermatological therapy was largely based on what was visible to the naked eye.
Today, thanks to advances in molecular diagnostics and next-generation sequencing (NGS), it is possible to analyze the skin microbiome in detail and understand its unique composition. This paves the way for personalized dermatology—an approach where care and treatment are tailored to each individual's skin biology, rather than relying on universal solutions.
In the future, the microbiome will serve as one of the most important biomarkers for selecting targeted therapies and individualized skincare regimens.