I like to think of the skin’s moisture barrier as a moat to a castle: it keeps antagonists that cause acne and wrinkles (like dirt, pollution, and UV rays) away. But like all lines of defense, your natural skin barrier could always use some extra reinforcement, and that’s where ectoin, a powerful skin shield, comes in.
But how exactly does it work? Ectoin forms a protective layer on the skin and helps create a boundary between environmental stressors and the epidermis—effectively blocking those that cause aging and inflammation. I spoke with two dermatologists and an esthetician to dive deeper into ectoin, explore how it works, who should try it, and how to incorporate the skin protector into your routine. Trust me on this one. Your skin barrier will thank me later.
What is Ectoin?
Ectoin is an extremolyte: a small (but tough) molecule found in certain bacteria. It’s renowned for its stress-protective properties against environmental factors like extreme temperatures, pH levels, salinity, drought, and even irradiation. “Ectoin binds water to molecules and creates a protective shield around proteins and other biomolecules,” says Dr. Hadley King, an NYC-based, board-certified dermatologist. Because of its ability to protect against these far-out conditions, it can also protect the skin from factors that contribute to acne, inflammation, and wrinkles.
What Are the Benefits of Ectoin?
According to Dr. Marisa Garshick, MD, FAAD, and board-certified dermatologist at MDCS, ectoin’s protective nature will guard skin cells from damage caused by chemical or physical stress. “By strengthening the skin's natural defenses, ectoin helps improve its resilience against environmental stressors like UV radiation, pollution, and harsh weather conditions,” she says. It does this by forming an insulating layer on the skin’s surface with antioxidant properties, ultimately neutralizing free radicals.
According to celebrity esthetician Ian Michael Crumm, ectoin also helps stabilize membranes and proteins, which helps reduce water loss. This makes it extremely useful for ensuring that the skin looks and feels plump and hydrated, which in turn helps reduce the appearance of fine lines and inflammation.
“Overall, ectoin helps maintain a healthy and strong skin barrier, essential for smooth, hydrated, and protected skin,” says Dr. Garshick.
What Ingredients Pair Well with Ectoin?
Ectoin generally plays well with other skincare ingredients, according to the experts. “Ectoin works well with other hydrating and protecting ingredients like hyaluronic acid, niacinamide, and antioxidants,” says Crumm. It can also complement other barrier-strengthening ingredients, like ceramides.
When it comes to more potent ingredients, you might find ectoin in a product with alpha- or beta-hydroxy acids, such as glycolic, salicylic, or lactic acids. “[The ectoin] can help mitigate any potential dryness or irritation caused by these exfoliating ingredients,” says Dr. Garshick. She does warn, however, that mixing an ectoin product with strong acids yourself can result in reduced effectiveness, so it’s best to proceed with caution and consult your dermatologist before adding ectoin into your routine. “Avoid using ectoin alongside products containing high concentrations of retinol or vitamin C, as they can potentially cause irritation when used together,” she says.
Who Should Use Ectoin?
According to experts, ectoin is well-tolerated by most skin types. “Ectoin can be particularly helpful to dry or sensitive skin and for those concerned about anti-aging and preventing skin damage,” says Dr. King.
Its anti-inflammatory properties can also be useful for certain skin conditions. “Ectoin can reduce inflammation and soothe irritated skin, making it beneficial for eczema and rosacea,” says Crumm.
Where Does Ectoin Fit in a Skincare Routine?
Because ectoin can be found in various skincare products, like moisturizers, serums, sunscreens, and even face masks, it’s versatile and easy to incorporate into an existing skincare routine. “Use a serum with ectoin for a targeted treatment and protection from environmental stressors, or use a moisturizer with ectoin to help provide hydration and protect the skin barrier,” says Crumm. The world is your ectoin oyster.
Best Skincare Products with Ectoin
Squalane + Ectoin Overnight Rescue Mask
Crumm loves this soothing mask, which works to deeply hydrate and renew the skin. “It reduces the appearance of stress and fatigue for a refreshed and revitalized complexion by morning,” he says. The mask also contains peptides and magnesium to help minimize the appearance of aging, plus squalane for hydration and an extra skin-barrier boost.
Ceramidin Ectoin Face Cream for Very Dry Skin
“Great for dry skin, this face cream contains ceramides and ectoin to support the skin barrier,” says Dr. Garshick. It also contains other nourishing ingredients like olive, geranium, and bergamot oils to moisturize and soften the complexion.
Ectoine Hydrating & Plumping Facial Serum
This skin-protecting serum packs a punch, according to Dr. King. She loves that it contains different forms of hyaluronic acid and other humectants to hydrate different levels of the skin and optimize plumping effects. “[It also contains] emollients like squalane to support the skin barrier, bisabolol to soothe the skin, and ectoin to offer protection,” she says.
Universal Glow Daily Defense Mineral Sunscreen Fluid SPF 40
Ectoin is a great addition to SPF as it works to provide additional protection against UV radiation and pollution. This pick combines antioxidants, ectoin, and zinc to shield the skin from full spectrum UVA/UVB rays, plus blue light. It’s also suitable for all skin types and is extremely lightweight — with no residue left behind!
Retinal For All Renewing Serum
“This serum has a combination of retinaldehyde for anti-aging properties and ectoin to help minimize any potential irritation from the retinoid,” says Dr. King. It also has heartleaf extract to visibly brighten and soothe the skin.
Gross Dermin Fusion Fill + Repair Serum
If aging skin is a primary concern, opt for this serum that Dr. Garshick loves. “It works to fill lines and also helps firm and plump the skin. The proprietary formula delivers hyaluronic acid, peptides, niacinamide, and ectoin to help boost moisture and volume,” she says.
PowerBright Dark Spot Serum
Dr. King recommends this dark spot serum because of its hydrating ingredients and antioxidant additives that help strengthen the skin’s barrier. “[This serum has a] nice combination of niacinamide and hexylresorcinol to brighten the skin with ectoin and antioxidants for protection,” she says. She also loves that it contains humectants like sodium hyaluronate and glycerin to hydrate the skin and emollients like squalane, triglycerides, sweet almond oil, and jojoba to support the skin barrier.
Want more stories like this?
Scent-sual Seduction
Baby’s First 'Baby Botox'
So, We All Want to Smell Like Weed Now?