What Is the Skin Microbiome and Why Does Every Product You Use Affect It?
Most of us grew up thinking of our skin as a surface, something to be cleansed, treated, and protected. The science of the skin biome asks us to think differently. Your skin is not a surface. It is an ecosystem.
The skin is a an ecosystem
The human skin hosts an estimated 1.8 square metres of microbiome, trillions of bacteria, fungi, and other microorganisms living in a complex, interdependent ecosystem. In a healthy state, this ecosystem maintains the skin's pH, regulates its inflammatory response, supports the barrier function, and protects against pathogenic microorganisms that would otherwise cause infection and irritation.
This is not theory. It is established microbiome science, the same science that has transformed our understanding of the gut in the past two decades, now being applied to the skin.
How conventional skincare the skin microbiome
Most conventional skincare, including products marketed as clean, contains ingredients that disrupt the skin biome. Synthetic preservatives, by definition, inhibit microbial growth. They are formulated to prevent bacteria from multiplying in the product. Applied to the skin repeatedly, they do not distinguish between the bacteria in the bottle and the bacteria that are meant to be on your face.
Artificial fragrance, essential oils, sulphates, and emulsifiers can alter the skin's pH and microbial balance. The result, over time, is a compromised ecosystem: a skin biome that is less diverse, less resilient, and less capable of its own repair and regulation.
This helps explain why so many women find that long-term use of conventional skincare eventually seems to make the skin more dependent, not less.
The skin that needs more and more to function is often the skin that has been stripped of its own intelligence.
Why fermented skincare supports the skin microbiome
During fermentation, microorganisms produce postbiotics and metabolites that help support the skin barrier and microbial balance. Unlike aggressive exfoliating or antimicrobial products, slow-fermented skincare works in cooperation with the skin’s existing ecosystem rather than against it.
This is one reason fermented botanical skincare is becoming increasingly relevant within microbiome science.
What supports a healthy skin microbiome
Biome-aligned skincare has a few defining principles: fewer synthetic ingredients, no broad-spectrum antimicrobials, no fragrance or fragrance components that disrupt pH, and ideally the presence of bioactive plant compounds that the skin's microorganisms can use.
Fermented skincare has particular relevance here. The fermentation process produces postbiotics, metabolites that have been shown to support microbial diversity and barrier integrity. A slow-fermented extract, applied consistently, is essentially a prebiotic environment for the skin biome.
This is the science behind PLUM-P's formulation. Not as a trend, but as a considered response to what the skin actually needs.
When you understand the skin biome, the criteria for what belongs on your skin become very clear.
Explore biome-supportive skincare by PLUM-P.
Frequently Asked Questions
What is the skin microbiome?
The skin microbiome is the ecosystem of bacteria, fungi, and microorganisms that naturally live on the skin. In a healthy state, this ecosystem helps regulate pH, support the skin barrier, and protect against irritation and environmental stress.
How does skincare affect the skin microbiome?
Many conventional skincare products contain preservatives, fragrances, sulphates, and antimicrobial ingredients that can disrupt the skin microbiome over time. This may weaken the skin barrier and reduce the skin’s natural resilience.
What is microbiome skincare?
Microbiome skincare refers to products formulated to support the skin’s natural microbial balance rather than disrupt it. This often includes fewer synthetic ingredients and ingredients that help maintain barrier integrity and hydration.
Is fermented skincare good for the skin microbiome?
Fermented skincare may help support the skin microbiome because fermentation produces postbiotics and bioactive compounds that work in harmony with the skin’s ecosystem. Slow-fermented botanical extracts can help support barrier function and microbial diversity.
What are postbiotics in skincare?
Postbiotics are beneficial compounds created during the fermentation process. In skincare, they may help support hydration, barrier integrity, and the overall balance of the skin microbiome.