Skin science article
Dieux Skin Instant Angel Versus Allies of Skin Peptide & Antioxidants Firming Daily Treatment
Dieux Skin Instant Angel Versus Allies of Skin Peptide & Antioxidants Firming Daily Treatment This barrier-repair moisturizer is formulated around Squalane and Linoleic Acid to strengthen the skin barrier and hydrate skin. This anti-aging moisturizer is formul
Dieux Skin Instant Angel Versus Allies of Skin Peptide & Antioxidants Firming Daily Treatment
This barrier-repair moisturizer is formulated around Squalane and Linoleic Acid to strengthen the skin barrier and hydrate skin.
This anti-aging moisturizer is formulated around Niacinamide and Tetrahexyldecyl Ascorbate to soften the look of wrinkles and calm redness.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Glycerin
Squalane
Caprylic/Capric Triglyceride
Coconut Alkanes
Glyceryl Stearate
Meadowfoam Estolide
PEG-100 Stearate
Cetearyl Alcohol
C12-15 Alkyl Benzoate
Phytosteryl Macadamiate
Triheptanoin
Coco-Caprylate/Caprate
Methylpropanediol
Linoleic Acid
Phospholipids
Phytosterols
Sodium Polyacrylate
Tribehenin
Caprylyl Glycol
Phenoxyethanol
Dipalmitoyl Hydroxyproline
Sodium PCA
Urea
Dilinoleic Acid/Butanediol Copolymer
Hydroxyproline Palmitamide
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Isohexadecane
Ceramide Ng
Trehalose
Sodium Phytate
PEG-10 Phytosterol
Hexylene Glycol
Polysorbate 60
Palmitic Acid
Lactic Acid
Polyquaternium-51
Tocopherol
Triacetin
Castor Oil/Ipdi Copolymer
Sorbitan Isostearate
Sodium Hyaluronate
Palmitoyl Hexapeptide-12
Water, Glycerin, Squalane, Caprylic/Capric Triglyceride, Coconut Alkanes, Glyceryl Stearate, Meadowfoam Estolide, PEG-100 Stearate, Cetearyl Alcohol, C12-15 Alkyl Benzoate, Phytosteryl Macadamiate, Triheptanoin, Coco-Caprylate/Caprate, Methylpropanediol, Linoleic Acid, Phospholipids, Phytosterols, Sodium Polyacrylate, Tribehenin, Caprylyl Glycol, Phenoxyethanol, Dipalmitoyl Hydroxyproline, Sodium PCA, Urea, Dilinoleic Acid/Butanediol Copolymer, Hydroxyproline Palmitamide, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Isohexadecane, Ceramide Ng, Trehalose, Sodium Phytate, PEG-10 Phytosterol, Hexylene Glycol, Polysorbate 60, Palmitic Acid, Lactic Acid, Polyquaternium-51, Tocopherol, Triacetin, Castor Oil/Ipdi Copolymer, Sorbitan Isostearate, Sodium Hyaluronate, Palmitoyl Hexapeptide-12
Isononyl Isononanoate
Caffeine
Niacinamide
Lactobacillus Ferment
Cetearyl Olivate
Butylene Glycol
Tetrahexyldecyl Ascorbate
Marrubium Vulgare Extract
Plantago Lanceolata Leaf Extract
Palmitoyl Tripeptide-5
Acetyl Tetrapeptide-40
Palmitoyl Tripeptide-8
Hydrolyzed Verbascum Thapsus Flower
Moringa Oleifera Seed Extract
Teprenone
Hyaluronic Acid
Syringa Vulgaris Leaf Cell Culture Extract
Sphingolipids
Astaxanthin
Bisabolol
Euterpe Oleracea Fruit Oil
Rubus Idaeus Seed Oil
Honey
Dimethyl Isosorbide
Ceramide NP
Phenyl T-Butylnitrone
Glutathione
Tetrahydrodiferuloylmethane
Tetrahydrodemethoxydiferuloylmethane
Tetrahydrobisdemethoxydiferuloylmethane
Ergothioneine
Xanthan Gum
Carbomer
Sorbitan Olivate
Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane
Mica
Dextran
Citric Acid
Sodium Hydroxide
Acrylamide/Sodium Acryloyldimethyltaurate Copolymer
CI 77891
Ethylhexylglycerin
Maltodextrin
Polysorbate 80
Acetyl Tributyl Citrate
Tetrasodium EDTA
Sorbitan Oleate
Sodium Benzoate
Potassium Sorbate
Sodium Glycolate
Polysorbate 20
O-Cymen-5-Ol
Water, Glycerin, Caprylic/Capric Triglyceride, Isononyl Isononanoate, Caffeine, C12-15 Alkyl Benzoate, Niacinamide, Lactobacillus Ferment, Cetearyl Olivate, Butylene Glycol, Polysorbate 60, Tetrahexyldecyl Ascorbate, Marrubium Vulgare Extract, Plantago Lanceolata Leaf Extract, Palmitoyl Tripeptide-5, Acetyl Tetrapeptide-40, Palmitoyl Tripeptide-8, Hydrolyzed Verbascum Thapsus Flower, Moringa Oleifera Seed Extract, Teprenone, Phospholipids, Hyaluronic Acid, Syringa Vulgaris Leaf Cell Culture Extract, Sphingolipids, Astaxanthin, Bisabolol, Euterpe Oleracea Fruit Oil, Rubus Idaeus Seed Oil, Honey, Dimethyl Isosorbide, Ceramide NP, Phenyl T-Butylnitrone, Tocopherol, Glutathione, Tetrahydrodiferuloylmethane, Tetrahydrodemethoxydiferuloylmethane, Tetrahydrobisdemethoxydiferuloylmethane, Ergothioneine, Xanthan Gum, Caprylyl Glycol, Carbomer, Sorbitan Olivate, Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane, Mica, Dextran, Citric Acid, Sodium Hydroxide, Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, CI 77891, Ethylhexylglycerin, Isohexadecane, Maltodextrin, Polysorbate 80, Acetyl Tributyl Citrate, Tetrasodium EDTA, Sorbitan Oleate, Sodium Benzoate, Potassium Sorbate, Sodium Glycolate, Polysorbate 20, Phenoxyethanol, O-Cymen-5-Ol
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Alternatives
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
C12-15 Alkyl Benzoate is a lightweight emollient made by combinig benzoic acid with fatty alcohols that are 12-15 carbons long.
In cosmetics, it plays several roles:
The Cosmetic Review Expert Panel has concluded the alkyl benzoate group to be safe as used in cosmetics; it wasn't found to be a skin irritant and unlikely to be absorbed due to its low water solubility.
This report recorded almost 1000 reported uses with concentrations up to 59% in leave-on products but your cosmetics will typically use 0.5-15% depending on the product.
It's often called a "SPF booster": this is because it keeps UV filters properly dissolved and evenly distributed to support a sunscreen's performance. It doesn't actually raise SPF on its own.
Overall, this ingredient is well tolerated.
This ingredient is fungal acne safe because it is an ester of benzoic acid.
Think of this ingredient as two parts stuck together: an oily part and an acid part. Malassezia only gets a meal when it can snip off a fatty acid to eat. With C12-15 Alkyl Benzoate, the acid part is benzoic acid, which isn't a fatty acid and which the yeast can't use as food.
Benzoic acid is actually used as a preservative to stop yeast from growing.
The oily part is a blend of C12-15 fatty alcohols but fatty alcohols in this size range can support only a little Malassezia growth (mostly for one species of Malassezia as well).
In the ingredient, those alcohols stay locked inside the molecule. The yeast can only reach them by snipping the benzoate bond, and that type of bond is harder for it to cut than a normal fatty bond.
So not much gets released. And whatever does get snipped comes packaged with benzoic acid, which discourages yeast growth.
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%.
Caprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created.
Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin.
Because it is not a free-fatty acid, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on).
Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
Topically, glycerin does several things at once:
Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.
Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.
This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.
Just know very high concentrations (>40%) can feel tacky in low humidity.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Isohexadecane is added to enhance texture, emulsify, and to help cleanse. It is an isoparrafin. It is a component of petrolatum.
Due to its large size, Isohexadecane is not absorbed by the skin. Instead, it sits on top and acts as an emollient. Emollients help keep your skin soft and smooth by trapping moisture within.
Isohexadecane is often used in products designed to help oily skin. It is lightweight and non-greasy while helping to moisturize. When mixed with silicones, it gives a product a silky feel.
Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!).
It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome.
On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive.
Another perk of this ingredient is that it stays functional across a wide pH range (3-10).
You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own.
Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU.
Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages.
Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon.
Phospholipids are a family of skin-identical lipids that makeup the structural backbone of every cell membrane in your body.
In cosmetics, they function as skin conditioning agents with emulsifier and surfactant properties. They're typically sourced from soybean or sunflower lecithin (or sometimes egg yolk or marine sources).
Because they mirror the lipids naturally found in the deeper layers of your skin, topical phospholipids help reinforce the lipid matrix, reduce transepidermal water loss, and leave skin feeling conditioned.
They're also used to form liposomes, or tiny self-assembling vesible used to stabilize actives like vitamin c or retinol. This helps these ingredients integrate into the upper layers of skin more easily.
Phospholipids are compatible with everything and the CIR Expert Panel has concluded them to be safe at current use levels.
Some types of phospholipids include:
Polysorbate 60 is used to help stabilize products. It is a surfactant and emulsifier. These properties help keep ingredients together in a product. Surfactants help reduce surface tension between ingredients with different states, such as liquids and solids. Emulsifiers help prevent oils and waters from separating.
Polysorbate 60 is sorbitol-based and created from the ethoxylation of sorbitan. Ethoxylation is a chemical reaction used to add ethylene oxide. Sorbitan is a the dehydrated version of sorbitol, a sugar found in fruits.
In this case, the 60 comes from reacting 60 units of ethylene oxide with sorbitan.
Polysorbates are commonly used in medicine and foods.
Tocopherol is a fat-soluble antioxidant known as Vitamin E.
You'll find this ingredient in the vast majority of skincare (for good reason). It works to neutralize free radicals, or unstable molecules generated by UV exposure, pollution, and other environmental stressors, before they can cause oxidative damage to your skin cells.
Topically applied tocopherol has been shown to protect against UV damage by ramping up the skin's own natural defense enzymes.
It also acts as a skin conditioning agent; some studies show that regular topical use can improve the skin's water-binding capacity over 2-4 weeks.
This ingredient is especially loved for being a team player. When combined with Vitamin C, the photoprotective effect of both ingredients roughly doubles and the combo also helps reduce UV-induced DNA damage.
This ingredient has some brightening potential but it's more of a prevention ingredient than spot-fader. Cell studies show it can slow down melanin production but it's worth noting that it's not the most powerful brightener out there.
In formulations, it also serves as a stabilizer that helps protect other oxidation-prone ingredients from degrading.
Concentrations usually range from 0.1-1% in most leave-on products.
Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!