What Is the Skin Microbiome and Why Does Every Product You Use Affect It?
For a long time, we thought of skin as something to manage.
If it became dry, we moisturised it. If it broke out, we treated it. If it looked dull, we exfoliated it.
The assumption was simple: healthier skin comes from doing more.
But what if healthy skin is less about what we do to it, and more about what we stop disrupting?
Your skin is an ecosystem
The skin isn't simply a protective covering. It's a living ecosystem.
Across its 1.8 square metres live trillions of bacteria, fungi and other microorganisms that exist in a remarkably balanced relationship with your body. Together they help regulate the skin's pH, support the barrier, influence inflammation and defend against unwanted microbes.
Just as we've come to understand that gut health depends on the health of its microbial community, we're now discovering that many aspects of healthy skin depend on this ecosystem too.
When the ecosystem thrives, the skin often does too.
Every product becomes part of that ecosystem
Once we begin thinking of the skin as an ecosystem, something interesting becomes obvious.
Every product we apply becomes part of that environment.
Some formulations support the balance already there.
Others unintentionally disrupt it.
This changes the question we should ask of our skincare.
Instead of asking, "What does this product do to my skin?"
Perhaps we should ask,
"What kind of environment does this product create?"
How conventional skincare can disrupt the microbiome
Many conventional skincare products, including those marketed as "clean", rely on ingredients that can interfere with the skin's natural microbial balance.
Synthetic preservatives are designed to inhibit microbial growth inside the bottle. Artificial fragrance, harsh surfactants, and some essential oils and emulsifiers can also disturb the skin's naturally acidic environment.
Each ingredient may serve a purpose.
But over time, repeated disruption can make it harder for the skin's ecosystem to do what it has evolved to do.
Ironically, the more we try to manage the skin, the less capable it can become of regulating itself.
The goal of skincare shouldn't be to replace the skin's own intelligence.
It should be to support it.
Why fermentation changes the conversation
Fermentation doesn't simply preserve plants.
It transforms them.
During fermentation, beneficial microorganisms produce postbiotics and other bioactive compounds that can help support the skin barrier and microbial balance.
Rather than working against the skin's existing ecosystem, fermented botanicals work alongside it.
This is one reason fermentation is becoming increasingly relevant within microbiome science.
A different way of formulating skincare
Once you understand the skin as an ecosystem, formulation becomes less about adding more ingredients and more about removing unnecessary disruption.
Biome-conscious skincare generally favours fewer synthetic ingredients, avoids broad-spectrum antimicrobial ingredients where possible, and respects the skin's naturally acidic environment.
Fermentation adds another layer by creating postbiotics and other compounds that help support microbial diversity and barrier integrity.
This is the thinking behind every PLUM-P formulation.
Not because fermentation is fashionable.
But because understanding the skin changes the way you formulate for it.
When you see the skin as an ecosystem rather than a surface, what belongs on it begins to look very different.
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.