Topic · 71 articles
Bacteria
Staph, Cutibacterium, Corynebacterium — the bacterial cast on human skin.
Antibiotics and the Skin Microbiome: What You Need to Know
How topical and oral antibiotics affect the skin microbiome, their impact on beneficial bacteria, and what happens after treatment ends.
Read articleAre AC, Wi-Fi, and Sealed Windows Starving Your Skin Microbes?
Modern buildings filter the outdoors away. Your skin microbiome might be paying the price.
Read articleCorynebacterium and the Skin Microbiome
Corynebacterium bacteria are abundant residents of the skin microbiome, producing protective compounds and competing with pathogens on moist body sites.
Read articleCould a Skin Microbiome Transplant Be the Future of Acne Treatment?
Researchers are swabbing clear skin and transplanting it onto acne-prone faces. Early results are quietly extraordinary.
Read articleCould Your Moisturizer Be Feeding the Wrong Bacteria?
The ingredients that hydrate your skin also nourish trillions of microbes. But not all of them appreciate the same meal.
Read articleCutibacterium acnes on Skin: Role in Health and Acne
Cutibacterium acnes is a dominant skin microbiome bacterium that supports barrier function but can also contribute to acne when imbalanced.
Read articleDesert Skin vs. Tropical Skin: A Microbial Comparison
Your skin's bacteria change dramatically depending on whether you live in a rainforest or a desert. Here's what the climate on your face really looks like.
Read articleDo You Really Share a Skin Microbiome With the People You Live With?
Cohabiting couples share more than a bathroom—they share microbes. Here's what science says about microbial intimacy.
Read articleDoes Frequent Hand Sanitizer Use Damage Your Skin Microbiome?
What happens to the microbes on your hands when you sanitize five times a day? The answer is stranger than you'd think.
Read articleFace Mapping: Why Your Forehead and Cheeks Host Completely Different Bacteria
Your forehead is an oil field. Your cheeks are a desert. And the microbes living on each know the difference.
Read articleGood vs Bad Skin Bacteria: What Lives on Your Skin
Not all skin bacteria cause problems. Learn which skin microbiome bacteria protect you and which can trigger breakouts, inflammation, and infection.
Read articleHow a Newborn's Skin Builds Its First Microbiome in 24 Hours
In the first day of life, a baby's sterile skin transforms into a microbial ecosystem—here's how it happens.
Read articleHow Antibacterial Soap Reshaped a Generation's Skin
Triclosan promised germ-free hands. Instead, it quietly rewired the bacterial communities living on millions of faces.
Read articleHow Chlorinated Pools Disrupt Your Skin's Microbial Balance
One hour in a chlorinated pool strips away your skin's protective microbes. Here's what happens next—and why it takes days to recover.
Read articleHow City Air Is Quietly Changing the Bacteria on Your Face
Urban pollution doesn't just dirty your skin—it rewrites the microbial communities living on it. Here's what researchers found.
Read articleHow the Romans Cleaned Their Skin Without Soap (And Why It Worked)
Ancient Romans scraped oil and sweat off with metal blades. Turns out, their skin microbiome may have been healthier for it.
Read articleHow to Improve Your Skin Microbiome: A Science-Backed Guide
Your skin microbiome is the key to healthy skin. Here are the proven, science-backed steps to restore balance.
Read articleIs Alcohol on the Skin Ever Actually Safe for Your Microbiome?
Alcohol kills 99.9% of bacteria. But your skin needs bacteria to stay healthy. Here's what actually happens when the two collide.
Read articleIs C. acnes Really the Bacteria Behind Your Breakouts?
The acne bacterium lives happily on clear skin too. So why do some people break out while others don't? The answer is strange.
Read articleIs There 2,000-Year-Old Microbial Logic Behind the Korean Double Cleanse?
Ancient cleansing rituals may have preserved skin bacteria better than modern soap. Here's the microbial science behind oil-then-water.
Read articleIs Your Skin Microbiome More Unique Than Your Fingerprint?
Your microbial signature is so distinct, scientists can identify you from a bacterial swab of your phone or keyboard.
Read articleIs Your Skin Microbiome Older Than Your Species?
The bacteria on your face may have been evolving with primates for 20 million years—long before humans existed.
Read articleMicrobiome & Sensitive Skin
Sensitive skin is often a barrier-microbiome problem, not a product problem. What to do differently.
Read articleMicrococcus luteus on Skin: Role in the Skin Microbiome
Micrococcus luteus is a common skin microbiome bacterium found on healthy skin. Learn its role, where it lives, and what science says about this microbe.
Read articlePostbiotics for the Skin Microbiome: What Science Shows
Postbiotics are metabolites from skin bacteria that may support barrier function and reduce inflammation. Learn what research says about their effects.
Read articlePrebiotics for the Skin Microbiome: How They Work
Prebiotics feed beneficial skin bacteria to support a balanced skin microbiome. Evidence-based guide to prebiotic ingredients and their mechanisms.
Read articleProbiotics for the Skin Microbiome: What the Science Says
How topical probiotics interact with the skin microbiome, which strains show evidence, and what mechanisms are supported by research.
Read articleSkin Dryness and the Microbiome: What's the Connection?
Dry skin disrupts the skin microbiome's balance, while microbial changes can worsen moisture loss. Learn how bacteria and barrier function interact.
Read articleSkin Inflammation and the Microbiome
How skin microbiome imbalances trigger and sustain inflammation. Evidence-based look at microbes, immune pathways, and inflammatory skin responses.
Read articleSkin Itching and the Microbiome: What the Science Shows
How skin microbiome imbalance triggers itching through immune activation, barrier disruption, and microbial metabolites. Evidence-based insights.
Read articleSkin Microbiome & Acne
How the bacteria on your skin drive or defuse acne, and what a microbiome-aware approach to breakouts actually looks like.
Read articleSkin Microbiome & Eczema
Eczema flares track with microbial imbalances, not just dry skin. Here's what the research says.
Read articleSkin Microbiome & Rosacea
Rosacea sits at the intersection of mites, bacteria, and immune signaling. A microbiome lens changes how we treat it.
Read articleSkin Microbiome and Acne: Bacterial Mechanisms Explained
How specific C. acnes strains, biofilms, and skin microbiome diversity shape acne development—the mechanism behind the bacteria, not just the association.
Read articleSkin Microbiome and Combination Skin: What Science Shows
How the skin microbiome differs across combination skin zones, and why T-zone and cheek bacteria create unique microbial landscapes on your face.
Read articleSkin Microbiome and Dry Skin: What the Science Shows
How the skin microbiome influences dry skin, water loss, and barrier function. Evidence-based guide to microbial changes in moisture-depleted skin.
Read articleSkin Microbiome and Eczema: Microbial Mechanisms
How S. aureus dominance, diversity loss, and filaggrin mutations disrupt the skin microbiome in eczema. Science-backed mechanisms explained.
Read articleSkin Microbiome and Hormonal Acne: What Research Shows
How hormones reshape the skin microbiome and drive acne breakouts. Evidence-based guide to bacterial shifts during hormonal fluctuations.
Read articleSkin Microbiome and Irritation: How Bacteria Affect Sensitivity
How disruption of the skin microbiome triggers irritation, which microbes protect against sensitivity, and what causes microbial imbalance.
Read articleSkin Microbiome and Oily Skin: What the Science Shows
How the skin microbiome interacts with sebum production and why oily skin hosts distinct microbial communities that influence breakouts and skin health.
Read articleSkin Microbiome and Perioral Dermatitis
How skin microbiome disruption contributes to perioral dermatitis—the red, bumpy rash around the mouth—and what research reveals about bacterial imbalance.
Read articleSkin Microbiome and Psoriasis: What the Research Shows
How skin microbiome changes in psoriasis affect inflammation and symptoms. Evidence-based guide to microbial shifts in psoriatic skin.
Read articleSkin Microbiome and Redness: What the Science Shows
How skin microbiome imbalance triggers redness through inflammation, immune activation, and barrier disruption. Evidence-based mechanisms explained.
Read articleSkin Microbiome and Rosacea: Demodex and Inflammation
How Demodex mites, Bacillus oleronius bacteria, and cathelicidin signaling drive rosacea inflammation through skin microbiome disruption.
Read articleSkin Microbiome and Sensitive Skin: Microbial Mechanisms
How sensitive skin appears at the microbial level: reduced diversity, shifted Staphylococcus ratios, and compromised lipid barrier interactions with bacteria.
Read articleSkin Microbiome Bacteria: An Overview
The skin microbiome contains trillions of bacteria that protect and regulate skin health. Learn which species live where and what they do.
Read articleSkin Microbiome Imbalance (Dysbiosis) Explained
Skin microbiome dysbiosis disrupts the balance of beneficial bacteria and fungi, leading to inflammation and skin conditions. Learn the science.
Read articleSkin Oiliness and the Microbiome: What's the Connection?
How skin microbiome bacteria interact with sebum production and oiliness. Evidence-based guide to microbes, sebum, and greasy skin.
Read articleSkin pH and the Microbiome: How Acidity Shapes Your Flora
How skin pH controls which microbes thrive on your skin. Learn why the acid mantle matters for your skin microbiome and what disrupts it.
Read articleSkin Sensitivity and the Microbiome: What's the Connection?
How imbalances in your skin microbiome trigger sensitivity, reactivity, and discomfort. Evidence-based mechanisms and microbial contributions.
Read articleSleep and the Skin Microbiome: How Rest Affects Skin Bacteria
Poor sleep disrupts the skin microbiome and barrier function. Learn how sleep quality affects skin bacteria and inflammation from circadian research.
Read articleStaphylococcus aureus and the Skin Microbiome
How S. aureus shifts from harmless colonizer to pathogen on skin. Learn its role in eczema, infection, and skin microbiome balance.
Read articleStaphylococcus epidermidis on Skin: Role & Function
S. epidermidis is a keystone skin microbiome bacterium that protects against pathogens and supports barrier function through antimicrobial compounds.
Read articleStress and the Skin Microbiome: How Cortisol Affects Skin Bacteria
Psychological stress alters the skin microbiome through cortisol and inflammation, affecting bacterial diversity and skin health. What the science shows.
Read articleThe At-Home Skin Microbiome Test: What It Is, How It Works, and What It Tells You
What an at-home microbiome test involves, how the science works, and what your results mean.
Read articleThe Silent Extinction of the Skin Microbiome
Your skin used to be a rainforest. Now it's a parking lot. An extinction event is happening on every square inch of your skin.
Read articleThe Skin Microbiome Shift No One Warns You About During Menopause
Estrogen doesn't just regulate your cycle—it feeds your skin's ecosystem. Here's what happens when it drops.
Read articleThe Ultimate Guide to the Skin Microbiome
The science of the living ecosystem on your skin — who lives there, what they do, and why it matters.
Read articleUneven Skin Texture and the Microbiome
How skin microbiome imbalance contributes to rough, bumpy texture through inflammation, barrier disruption, and altered keratinization.
Read articleUV Exposure and the Skin Microbiome: What You Need to Know
How ultraviolet radiation affects skin bacteria and fungi. Learn what happens to your skin microbiome when exposed to sunlight and UV rays.
Read articleWesternization and Skin: Which Microbes Did We Lose When We Moved Indoors?
What happened to our skin bacteria when we traded open air for climate control, soil for sanitizer, and sunlight for fluorescents?
Read articleWhat a Kiss Actually Transfers (It's Not Just Saliva)
A single ten-second kiss swaps 80 million bacteria. Here's what that does to the invisible ecosystems on your face.
Read articleWhat Actually Lives in Your Belly Button?
A cotton swab, 67 species of bacteria, and the bizarre biodiversity hiding in the one place you probably never clean.
Read articleWhat Happens to Your Skin Microbiome in Winter?
Cold air, dry heat, and thick sweaters don't just change how your skin feels—they reshape the entire microbial ecosystem living on it.
Read articleWhat Hunter-Gatherer Skin Reveals About Our Modern Microbiome
Swab a Hadza forager's skin and you'll find species city dwellers lost generations ago. What happened—and does it matter?
Read articleWhat Long-Haul Flights Do to Your Skin Microbiome
Cabin air drops humidity to desert levels. Your skin's microbial ecosystem responds in hours—not days.
Read articleWhat Puberty Does to the Bacteria on Your Face
Puberty doesn't just change your skin — it completely replaces the bacteria living on it. Here's what happens, and why.
Read articleWhy Hotel Sheets and Travel Water Trigger Breakouts
Your skin carries its hometown microbiome everywhere. Hotels, planes, and foreign water don't just disrupt your routine—they disrupt your bacteria.
Read articleWhy Your Dog's Skin Microbiome Starts to Look Like Yours
Living with a dog doesn't just change your routine—it quietly reshapes the bacterial community living on your skin.
Read articleWhy Your Skin Starts Smelling Different After 30 (Meet Nonenal)
A Japanese lab discovered the molecule behind 'aging smell.' The culprit? Lipid breakdown on your skin's surface.
Read articleYour Phone Screen Has a Microbiome — And It's Mostly Yours
Your phone's bacterial community is a mirror of your skin — and it follows you everywhere you go.
Read article
Milieu's software analyzes user-submitted information, facial scan data, and skin microbiome samples using research-informed statistical models that evolve over time. The resulting Skin Report provides educational insights about patterns in your skin's living environment. It is not medical advice, a medical diagnosis, or a prediction of any past, present, or future health condition. Milieu is not a medical device, and our services are not intended to diagnose, treat, cure, mitigate, or prevent any disease or medical condition. Our products and reports are designed for cosmetic and general skin wellness purposes only. Do not use Milieu to make decisions regarding medications, supplements, medical testing, or treatment. If you have symptoms, a diagnosed condition, or health-related concerns, consult a licensed healthcare professional. Results may be influenced by sample collection technique, laboratory processes, environmental factors, biological variability, and model limitations, and may be incomplete or inaccurate. Reports should be interpreted as informational guidance and not relied upon as the sole basis for medical or healthcare decisions.
