Zorah Structure Serum
A serum with 9 ingredients.
This barrier-repair serum is formulated around Argania Spinosa Kernel Oil to strengthen the skin barrier and hydrate skin.
We independently verify ingredients, backed by peer-reviewed research. Suggest an update.
What's inside
Benefits
Concerns
Ingredients Explained
Dicaprylyl Carbonate comes from carbonic acid and caprylyl alcohol, a fatty alcohol. It is an emollient and gives skin a velvet feel. The sources of Dicaprylyl Carbonate may be synthetic or from animals.
As an emollient, Dicaprylyl Carbonate creates a film on the skin. This film traps moisture in, keeping your skin soft and hydrated.
Isostearyl Isostearate is a plant-based and vegan emollient ester made by reacting Isostearyl Alcohol and Isostearic Acid.
It helps improve how the product spreads on skin, acts as a binding agent for makeup powders without modifying pigment color, and softens skin while helping it hold onto water.
This ingredient is very interesting as a hydrator; most moisturizers are either occlusives, humectants, or emollients. Isostearyl isostearate works through another route named "internal occlusion" by the head researcher.
Isostearyl isostearate nudges the skin's own lipids into a denser, more tightly packed arrangement. Packing the deeper layers of the stratum corneum together more efficiently means less water is able to escape.
This is a barrier-improving mechanism that hadn't been described before and plastic occlusion stress tests confirmed it improved the skin's water-permeability barrier function
Just one thing worth noting from the same review: this ingredient increased the penetration rate of a test drug through excised human skin. Though this ingredient is not classified as a penetration enhancer, it does interact with the barrier rather than sitting totally inert on top.
This ingredient does have a comedogenic rating of 4, but this doesn’t mean a formula with this ingredient will clog pores. Human testing has proved that any finished product with this ingredient won’t automatically make you break out; it really comes down to concentration, formula, and your skin.
Fungal acne:
The Malassezia yeast feeds on fatty acids and esters in the C11-24 range. Since both halves of this molecules are C18, it may not be fungal acne safe.
We don't have a description for Isostearyl Hydroxystearate yet.
Caprylic/Capric Triglyceride (aka MCT Oil) is a lightweight emollient, solvent, and texture enhancer. It is considered a skin-softener by helping to prevent moisture loss.
Though it behaves like an oil, it is not technically one due to its chemical composition. One perk of this ingredient is that it is very stable, resistant to oxidation, and unlikely to go rancid.
In practice, that translates to a long shelf life and a consistently elegant skin feel.
While there is an assumption Caprylic Triglyceride can clog pores due to it being derived from coconut oil, there is no research supporting this. Just patch test if you have concerns.
Fractionated coconut oil and MCT Oil are both listed as Caprylic/Capric Triglyceride according to INCI. This is because INCI names are based on the ingredient’s final chemical composition and not its marketing name or source.
This ingredient is treated as the gold standard fungal acne safe oil. Even though it is coconut derived, the problematic lauric acid is stripped out.
This leaves just caprylic (C8) and capric (C10) acid. These chain lengths actually trend antifungal; a 2020 study found caprylic acid was enough to disrupt Malassezia furfur cell membrane, with a caprylic acid derivative damaging membrane structures at concentrations as low as 0.2%.
Learn more about Caprylic/Capric TriglycerideWe don't have a description for Spilanthes Acmella Flower Extract yet.
You may know this ingredient as argan oil. It has emollient and skin conditioning properties that help soften skin and reinforce the lipid barrier.
The fatty acid profile of argan oil is roughly 45-55% oleic acid, 28-36% linoleic acid, 10-15% palmitic acid, and 5-7% stearic acid. It also contains vitamin E, sterols, squalene, and polyphenols like ferulic acid.
Two clinical studies in postmenopausal women found that applying argan oil for 60 days significantly improved skin elasticity and moisturization (reduced transepidermal water loss and increased epidermal water content).
Since it is high in oleic and linoleic acid, this ingredient may not be fungal acne safe. Both of these fall in the C11-C24 range that Malassezia yeast can metabolize.
Learn more about Argania Spinosa Kernel OilThis ingredient comes from winged kelp; it's an edible brown seaweed found on exposed rocky Atlantic shores.
In cosmetics, it has skin protecting and hair conditioning properties.
Lab testing has shown it to be an impressive antioxidant: out of 3 Icelandic seaweeds, Alaria had the most phenolics, flavonoids, and strongest antioxidant capacity. It also blocked the enzymes that break down collagen, elastin, hyaluronic acid, and the enzyme that drives pigment creation.
Cell studies found it could lower progerin production in aged skin cells (with no effect in cells from young donors). Progerin is a protein that weakens the cell nucleus and drives both premature aging and normal aging processes
Just keep in mind these results are all from test tube and cell studies and there are currently no human trials on the extract itself.
Safety-wise, this one has a solid record. Human sensitization tests at 0.5 to 2.5% and under 5% all came back negative, and brown algae ingredients aren't restricted in the EU.
You'll see algae listed as a 5/5 on a lot of pore-clogging charts and that number doesn't come from anywhere; it's not in the original rabbit-ear studies that most comedogenic ratings trace back to.
The reasoning behind the reputation is that seaweed is high in iodine and iodine can trigger acne-like breakouts when eaten. This traces back to a 1976 letter in Archives of Dermatology describing two women whose breakouts cleared after they stopped taking high-dose kelp supplements orally.
And the reaction of these two women wasn't clogged pores at all: it was an iodine-triggered pustular rash. Later research found normal dietary iodine doesn't meaningfully affect acne either and nobody has shown topical algae delivers enough iodine to matter.
What we do have is dozens of brown and red algae ingredients found to be non-irritating and non-sensitizing, and a handful of studies that found algae compounds may actually help acne.
However, plenty of people do report breaking out from algae-containing products. Skin is individual and it's worth avoiding if yours has reacted to algae before.
Learn more about Alaria Esculenta ExtractAleurites Moluccanus Seed Oil is oil from the Kukui nut and native to Hawaii.
Aleurites Moluccanus Seed Oil helps soften the skin as an emollient. It also provides antioxidants. Antioxidants help fight free-radicals. Free-radicals are molecules that may damage your skin cells, such as pollution.
Aleurites Moluccanus Seed Oil can also help soothe the skin.
This nut has been used by many cultures for curing illnesses, such as headache and fever.
Learn more about Aleurites Moluccanus Seed OilCamelina Sativa Seed Oil is an oil and isn't fungal acne safe.
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Where it's from
Zorah is a Canadian brand
We're dedicated to providing you with the most up-to-date and science-backed ingredient info out there.
The data we've presented on this page has been verified by a member of the SkinSort Team.
Read more about us· Updated January 21, 2026 • Added by Maelie234