The Milieu Journal
Learn about your skin
The science, stories, and reference library behind your skin microbiome. In-depth essays, bacteria-by-bacteria guides, and everyday curiosities, written by the Milieu Science Team.
Browse by topic
Featured
How 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 — from what to stop doing, to what to start.
The Silent Extinction of the Skin Microbiome
Your skin used to be a rainforest. Now it's a parking lot. There's an extinction event happening right now on every square inch of your skin.
The At-Home Skin Microbiome Test: What It Is, How It Works, and What It Tells You
Can you test your skin microbiome at home? Yes. Here's what an at-home microbiome test involves, how the science works, what your results mean, and how it leads to truly personalized skincare.
Library
Conditions
Evidence-based guides to acne, eczema, rosacea, sensitivity, and the symptoms that come with them.
27
Conditions
Evidence-based guides to acne, eczema, rosacea, sensitivity, and the symptoms that come with them.
- Microbiome & Sensitive Skin6 min read
- Skin Dryness and the Microbiome: What's the Connection?4 min read
- Skin Flaking and the Microbiome: What's the Connection?4 min read
- Skin Inflammation and the Microbiome5 min read
- Skin Itching and the Microbiome: What the Science Shows5 min read
- Skin Microbiome & Acne7 min read
- Skin Microbiome & Eczema7 min read
- Skin Microbiome & Rosacea7 min read
- Skin Microbiome and Acne: Bacterial Mechanisms Explained6 min read
- Skin Microbiome and Combination Skin: What Science Shows5 min read
- Skin Microbiome and Dry Skin: What the Science Shows5 min read
- Skin Microbiome and Eczema: Microbial Mechanisms5 min read
- Skin Microbiome and Fungal Acne: Causes & Treatment5 min read
- Skin Microbiome and Hormonal Acne: What Research Shows5 min read
- Skin Microbiome and Irritation: How Bacteria Affect Sensitivity4 min read
- Skin Microbiome and Oily Skin: What the Science Shows5 min read
- Skin Microbiome and Perioral Dermatitis5 min read
- Skin Microbiome and Psoriasis: What the Research Shows5 min read
- Skin Microbiome and Redness: What the Science Shows5 min read
- Skin Microbiome and Rosacea: Demodex and Inflammation5 min read
- Skin Microbiome and Seborrheic Dermatitis5 min read
- Skin Microbiome and Sensitive Skin: Microbial Mechanisms4 min read
- Skin Microbiome and Skin Barrier Damage5 min read
- Skin Oiliness and the Microbiome: What's the Connection?5 min read
- Skin Redness and the Microbiome: Causes and Connections5 min read
- Skin Sensitivity and the Microbiome: What's the Connection?5 min read
- Uneven Skin Texture and the Microbiome4 min read
Microbiome
The bacteria, fungi, and mites living on you. How the microbiome forms, shifts across life, and connects one body to another.
31
Microbiome
The bacteria, fungi, and mites living on you. How the microbiome forms, shifts across life, and connects one body to another.
- Corynebacterium and the Skin Microbiome4 min read
- Could a Skin Microbiome Transplant Be the Future of Acne Treatment?5 min read
- Cutibacterium acnes on Skin: Role in Health and Acne4 min read
- Demodex Mites: The Tiny Passengers Living on Your Eyelashes4 min read
- Do You Really Share a Skin Microbiome With the People You Live With?5 min read
- Face Mapping: Why Your Forehead and Cheeks Host Completely Different Bacteria5 min read
- Good vs Bad Skin Bacteria: What Lives on Your Skin4 min read
- How a Newborn's Skin Builds Its First Microbiome in 24 Hours4 min read
- Is C. acnes Really the Bacteria Behind Your Breakouts?5 min read
- Is Your Skin Microbiome More Unique Than Your Fingerprint?4 min read
- Is Your Skin Microbiome Older Than Your Species?4 min read
- Leaky Gut and the Skin Microbiome: What's the Link?5 min read
- Malassezia and Fungal Acne: Causes and Mechanisms4 min read
- Malassezia and Skin Health: Fungal Microbiome Impact4 min read
- Micrococcus luteus on Skin: Role in the Skin Microbiome4 min read
- Skin Microbiome Bacteria: An Overview5 min read
- Skin Microbiome Imbalance (Dysbiosis) Explained5 min read
- Skin pH and the Microbiome: How Acidity Shapes Your Flora4 min read
- Staphylococcus aureus and the Skin Microbiome5 min read
- Staphylococcus epidermidis on Skin: Role & Function4 min read
- The Gut-Brain-Skin Axis: How Three Organs Talk5 min read
- The Gut-Skin Axis: How Your Gut Microbiome Affects Skin4 min read
- The Skin Microbiome Shift No One Warns You About During Menopause4 min read
- The Ultimate Guide to the Skin Microbiome9 min read
- Westernization and Skin: Which Microbes Did We Lose When We Moved Indoors?5 min read
- What a Kiss Actually Transfers (It's Not Just Saliva)4 min read
- What Actually Lives in Your Belly Button?4 min read
- What Hunter-Gatherer Skin Reveals About Our Modern Microbiome6 min read
- What Puberty Does to the Bacteria on Your Face4 min read
- Why Your Dog's Skin Microbiome Starts to Look Like Yours4 min read
- Why Your Skin Starts Smelling Different After 30 (Meet Nonenal)4 min read
Environment
How daily life shapes your skin. Products, ingredients, routines, modern habits, and the history behind them.
33
Environment
How daily life shapes your skin. Products, ingredients, routines, modern habits, and the history behind them.
- Antibiotics and the Skin Microbiome: What You Need to Know5 min read
- Are AC, Wi-Fi, and Sealed Windows Starving Your Skin Microbes?5 min read
- Are We Still Paying for the Beauty Routines of the 1950s?4 min read
- Could Your Moisturizer Be Feeding the Wrong Bacteria?5 min read
- Dairy and the Skin Microbiome: What the Science Shows5 min read
- Desert Skin vs. Tropical Skin: A Microbial Comparison5 min read
- Diet and the Skin Microbiome: What Research Shows6 min read
- Does Frequent Hand Sanitizer Use Damage Your Skin Microbiome?4 min read
- Hard Water and the Skin Microbiome: What You Need to Know4 min read
- Hard Water vs. Soft Water: Which One Does Your Skin Microbiome Prefer?5 min read
- How Antibacterial Soap Reshaped a Generation's Skin5 min read
- How Chlorinated Pools Disrupt Your Skin's Microbial Balance5 min read
- How City Air Is Quietly Changing the Bacteria on Your Face4 min read
- How the Romans Cleaned Their Skin Without Soap (And Why It Worked)6 min read
- How to Use Your Superbiome System (Hint: Do Less)10 min read
- Is Alcohol on the Skin Ever Actually Safe for Your Microbiome?4 min read
- Is Over-Washing Your Face Causing the Exact Problem You're Trying to Fix?4 min read
- Is There 2,000-Year-Old Microbial Logic Behind the Korean Double Cleanse?4 min read
- Pollution and the Skin Microbiome: What Research Shows5 min read
- Postbiotics for the Skin Microbiome: What Science Shows5 min read
- Prebiotics for the Skin Microbiome: How They Work4 min read
- Probiotics for the Skin Microbiome: What the Science Says5 min read
- Sleep and the Skin Microbiome: How Rest Affects Skin Bacteria5 min read
- Stress and the Skin Microbiome: How Cortisol Affects Skin Bacteria5 min read
- Sugar and the Skin Microbiome: How Diet Affects Your Skin5 min read
- UV Exposure and the Skin Microbiome: What You Need to Know5 min read
- We Got Too Clean8 min read
- What Happens to Your Skin Microbiome in Winter?4 min read
- What Long-Haul Flights Do to Your Skin Microbiome4 min read
- Why 'Squeaky Clean' Skin Isn't Actually Healthy Skin5 min read
- Why Hotel Sheets and Travel Water Trigger Breakouts5 min read
- Why Your Skincare Routine Isn't Working (And What the Microbiome Has to Do With It)7 min read
- Your Phone Screen Has a Microbiome — And It's Mostly Yours4 min read
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.
