Skin Microbiome and Eczema: How Good Bacteria Help Calm Sensitive Skin

There are trillions of microorganisms living on your skin right now. Bacteria, fungi and viruses that form an invisible ecosystem working quietly to keep your skin healthy. This ecosystem is called your skin microbiome, and for people with eczema-prone skin, it plays a far bigger role than most realise.

While much of the conversation around eczema skincare focuses on hydration and barrier repair, emerging research points to something deeper. The balance of bacteria on your skin’s surface may be one of the most important factors in managing sensitivity, redness and flare-ups.

What Is the Skin Microbiome?
How the Microbiome Affects Eczema-Prone Skin
What Disrupts Your Skin’s Microbial Balance?
Post-Biotics: A Smarter Approach to Microbiome Skincare
Choosing Skincare That Respects Your Microbiome
Why SERICH Built Post-Biotics into Its Formula
Give Your Skin Microbiome the Support It Deserves

What Is the Skin Microbiome?

Your skin microbiome is a community of trillions of microorganisms that live on and within the outer layers of your skin. Much like the gut microbiome, which has received significant attention in recent years, the skin microbiome maintains its own delicate balance of beneficial and potentially harmful organisms.

When this balance is stable, good bacteria act as a natural defence system. They help regulate inflammation, protect against pathogens and support the skin’s ability to retain moisture. A healthy microbiome essentially functions as an invisible shield, reinforcing your skin barrier from the outside in.

How the Microbiome Affects Eczema-Prone Skin

Research published in the Journal of Allergy and Clinical Immunology has shown that people with eczema-prone skin tend to have lower microbial diversity compared to those with healthy skin. In particular, studies have found an overgrowth of Staphylococcus aureus, a potentially harmful bacterium, on the skin of individuals experiencing eczema flare-ups.

This imbalance, known as dysbiosis, creates a cycle that is difficult to break. Fewer good bacteria means less natural defence. Less defence means more irritation. More irritation leads to more scratching, which further damages the skin barrier and allows harmful bacteria to thrive.

For adults living in Singapore, where the combination of heat, humidity and frequent transitions into air-conditioned environments already strains the skin, microbiome disruption can make eczema symptoms noticeably worse.

What Disrupts Your Skin’s Microbial Balance?

Several everyday factors can disrupt your skin’s microbial balance, often without you realising it:

Over-cleansing: harsh soaps and foaming cleansers strip away both dirt and beneficial bacteria
Antibacterial products: while they target harmful bacteria, they do not discriminate and remove good bacteria too
Topical steroids: prolonged use can alter the skin’s microbial environment, potentially reducing diversity over time
Environmental stress: pollution, UV exposure and extreme temperature shifts common in Singapore’s climate affect microbiome stability
Synthetic fragrances and preservatives: found in many skincare products, these can irritate sensitive skin and disturb the microbial ecosystem

The challenge for eczema-prone skin is that many conventional skincare products designed to help can actually contribute to the problem. This is why understanding the microbiome matters when choosing what you put on your skin.

Post-Biotics: A Smarter Approach to Microbiome Skincare

If the microbiome is so critical, the logical question becomes: how do you support it?

This is where post-biotics come in. You may already be familiar with probiotics (live beneficial bacteria) and prebiotics (food that feeds good bacteria). Post-biotics are the third and often most overlooked piece of the puzzle.

Post-biotics are the beneficial compounds produced during probiotic fermentation. They include short-chain fatty acids, peptides, enzymes and other bioactive compounds that directly benefit the skin. What makes post-biotics particularly valuable for skincare is their stability. Live probiotics can degrade quickly in topical formulations, making their efficacy unpredictable. Post-biotics, by contrast, remain stable and effective from the moment they are applied.

When used topically on eczema-prone skin, post-biotics offer several key benefits:

Strengthen the skin’s natural defences by reinforcing antimicrobial peptide production, helping to keep harmful bacteria in check
Calm inflammation through bioactive compounds that help reduce inflammatory markers on the skin’s surface
Support microbiome diversity by creating an environment where existing good bacteria can flourish, rather than introducing new organisms
Complement barrier repair when paired with ceramides and lipid-replenishing ingredients, addressing both the structural and microbial dimensions of skin health

This dual approach, supporting the microbiome while repairing the barrier, is what sets advanced eczema skincare apart from conventional moisturisers.

Choosing Skincare That Respects Your Microbiome

Not all skincare is microbiome-friendly. In fact, many products marketed for sensitive skin contain ingredients that can quietly undermine microbial balance. When managing eczema-prone skin, look for products that:

Include post-biotic ingredients: Lactobacillus Ferment is one of the most well-researched post-biotics in skincare
Avoid unnecessary irritants: fragrances, sulphates and harsh preservatives can disrupt microbial balance
Are steroid-free for daily use: steroid-free formulations are kinder to the skin’s ecosystem over time
Carry third-party certifications: EWG-verified and dermatologist-tested products provide assurance that ingredients have been rigorously assessed for safety

Your skin’s microbiome is not something you can rebuild overnight, but every product choice you make either supports it or works against it.

Why SERICH Built Post-Biotics into Its Formula

When SERICH team began researching ingredients for a moisturiser that could genuinely support eczema-prone skin, the microbiome was one of the first areas he explored. He discovered that many conventional eczema products focused solely on surface hydration while ignoring the microbial environment beneath.

Working alongside R&D professionals, the team made post-biotics from Lactobacillus Ferment a core pillar of SERICH’s Signature Second Skin Moisturising Cream. Combined with a triple-ceramide complex, Centella Asiatica, Hydrolyzed Hyaluronic Acid, Olive Squalane and Shea Butter, the formula addresses both barrier repair and microbiome support in a single product.

Every ingredient is EWG-verified with a green score of 1, the lowest hazard rating. The cream is PETA-approved, dermatologist-tested, steroid-free, fragrance-free and plant-based. It is not a quick fix. It is a daily commitment to working with your skin rather than against it.

Give Your Skin Microbiome the Support It Deserves

Your skin is a living ecosystem. Managing eczema-prone skin effectively means caring for that ecosystem, not just masking symptoms on the surface. If you are ready to take a microbiome-friendly approach to your skincare, explore the Serich Moisturising Cream and discover how post-biotics and ceramides work together to support calmer, healthier skin.