Skin science article
Paula's Choice Hydralight Moisture Infusing Lotion Versus Paula's Choice Clinical Ultra-Rich Moisturizer
Paula's Choice Hydralight Moisture Infusing Lotion Versus Paula's Choice Clinical Ultra-Rich Moisturizer This barrier-repair moisturizer is formulated around Squalane and Avena Sativa Kernel Extract to strengthen the skin barrier and hydrate skin. This barrier
Paula's Choice Hydralight Moisture Infusing Lotion Versus Paula's Choice Clinical Ultra-Rich Moisturizer
This barrier-repair moisturizer is formulated around Squalane and Avena Sativa Kernel Extract to strengthen the skin barrier and hydrate skin.
This barrier-repair moisturizer is formulated around Butyrospermum Parkii Butter Unsaponifiables and Ceramide NP to strengthen the skin barrier and hydrate skin.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Neopentyl Glycol Diheptanoate
Cyclopentasiloxane
Butylene Glycol
Dimethicone
Bis-Diglyceryl Polyacyladipate-2
Propylene Glycol Isoceteth-3 Acetate
Squalane
Glyceryl Stearate
PEG-100 Stearate
Potassium Cetyl Phosphate
Cetyl Alcohol
Magnesium Aluminum Silicate
Tocopheryl Acetate
Cholesterol
Avena Sativa Kernel Extract
Camellia Sinensis Leaf Extract
Punica Granatum Extract
Vaccinium Macrocarpon Fruit Extract
Sodium Hyaluronate
Glycerin
Superoxide Dismutase
Tetrahexyldecyl Ascorbate
Sodium PCA
Phytosphingosine
Caprylic/Capric Triglyceride
Dimethicone Crosspolymer
Cucumis Sativus Fruit Extract
Xanthan Gum
Laureth-4
Laureth-23
Sodium Hydroxide
Phenoxyethanol
Chlorphenesin
Benzoic Acid
Sorbic Acid
Water, Neopentyl Glycol Diheptanoate, Cyclopentasiloxane, Butylene Glycol, Dimethicone, Bis-Diglyceryl Polyacyladipate-2, Propylene Glycol Isoceteth-3 Acetate, Squalane, Glyceryl Stearate, PEG-100 Stearate, Potassium Cetyl Phosphate, Cetyl Alcohol, Magnesium Aluminum Silicate, Tocopheryl Acetate, Cholesterol, Avena Sativa Kernel Extract, Camellia Sinensis Leaf Extract, Punica Granatum Extract, Vaccinium Macrocarpon Fruit Extract, Sodium Hyaluronate, Glycerin, Superoxide Dismutase, Tetrahexyldecyl Ascorbate, Sodium PCA, Phytosphingosine, Caprylic/Capric Triglyceride, Dimethicone Crosspolymer, Cucumis Sativus Fruit Extract, Xanthan Gum, Laureth-4, Laureth-23, Sodium Hydroxide, Phenoxyethanol, Chlorphenesin, Benzoic Acid, Sorbic Acid
Butyrospermum Parkii Butter Unsaponifiables
Glyceryl Stearate Se
Olea Europaea Fruit Oil
Stearic Acid
Mangifera Indica Seed Butter
Cocos Nucifera Fruit Extract
Ceramide NP
Ceramide AP
Ceramide EOP
Sphingolipids
Phospholipids
Squalene
Tocopherol
Simmondsia Chinensis Seed Oil
Persea Gratissima Oil
Glycine Soja Oil
Oryza Sativa Bran Extract
Panthenol
Ascorbyl Palmitate
Beta-Sitosterol
Hydrogenated Vegetable Glycerides Citrate
Propylene Glycol
Sodium Lauroyl Lactylate
Carbomer
Disodium EDTA
Ethylhexylglycerin
Water, Butyrospermum Parkii Butter Unsaponifiables, Caprylic/Capric Triglyceride, Glyceryl Stearate Se, Olea Europaea Fruit Oil, Dimethicone, Stearic Acid, Glyceryl Stearate, Mangifera Indica Seed Butter, Cetyl Alcohol, Cocos Nucifera Fruit Extract, Ceramide NP, Ceramide AP, Ceramide EOP, Sphingolipids, Phospholipids, Phytosphingosine, Squalene, Cholesterol, Tocopherol, Simmondsia Chinensis Seed Oil, Persea Gratissima Oil, Glycine Soja Oil, Oryza Sativa Bran Extract, Avena Sativa Kernel Extract, Glycerin, Panthenol, Ascorbyl Palmitate, Beta-Sitosterol, Hydrogenated Vegetable Glycerides Citrate, Propylene Glycol, Sodium Lauroyl Lactylate, Xanthan Gum, Carbomer, Disodium EDTA, Ethylhexylglycerin, Phenoxyethanol
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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.
Avena Sativa Kernel Extract is is derived from colloidal oatmeal. Besides being a healthy breakfast, oats have many benefits in skincare too.
This ingredient helps sooth, hydrate, and protect the skin. The starches in colloidal oatmeal are able to bind water, keeping the skin hydrated.
The cellulose and fiber in colloidal oatmeal help reduce inflammation. This can also help the skin feel softer.
Colloidal Oatmeal is also an antioxidant. Antioxidants protect our skin from free-radical damage.
Oatmeal also contains beneficial compounds:
This ingredient is created by mixing grounded oatmeal and a liquid base.
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%.
Cetyl Alcohol is a fatty alcohol. Fatty Alcohols are most often used as an emollient or to thicken a product.
Its main roles are:
Though it has "alcohol" in the name, it is not related to denatured alcohol or ethyl alcohol.
The FDA allows products labeled "alcohol-free" to have fatty alcohols.
This ingredient may not be fungal acne safe. It is a primary fatty alcohol with a chain length above 12 carbons. A study from 2019 show Malassezia can feed on fatty alcohols in this range, so it may trigger fungal acne in those prone to it.
Cholesterol is a lipid that is naturally found in human skin and is one of the three key components of your skin barrier. In skincare, it is an emollient and barrier-repairing ingredient.
It works by fitting directly into the lipid layers of skin to help restore structure and reduce transepidermal water loss (TEWL).
This is a great ingredient for dry, compromised, or aging skin; our skin starts to produce less cholesterol with age.
Research shows cholesterol works best in combination with ceramides and fatty acids, the other two major components in your skin barrier.
Cholesterol is also a well-establish penetration enhancer and can help other actives absorb more effectively.
Cosmetic-grade cholesterol is usually derived from lanolin but plant and synthetic options also exist. We recommend reaching out to the brand if you have questions about their source of cholesterol.
Dimethicone is a type of synthetic silicone created from natural materials such as quartz. It is also known as polydimethylsiloxane.
What it does:
Dimethicone comes in different viscosities:
Depending on the viscosity, dimethicone has different properties.
Ingredients lists don't always show which type is used, so we recommend reaching out to the brand if you have questions about the viscosity.
This ingredient is unlikely to cause irritation because it does not get absorbed into skin. However, people with silicone allergies should be careful about using this ingredient.
Note: Dimethicone may contribute to pilling. This is because it is not oil or water soluble, so pilling may occur when layered with products. When mixed with heavy oils in a formula, the outcome is also quite greasy.
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.
Glyceryl Stearate is made by reacting glycerin with stearic acid (typically sourced from plant oils like palm or coconut). It's an emulsifier, emollient, and mild occlusive.
Emulsifiers help ingredients like oil and water stay mixed so your formula stays nicely blended and uniform in texture.
This ingredient is typically used in concentrations between 1-10%. Studies have found it to be non-sensitizing, non-phototoxic, and non-photoallergenic.
A close cousin of this ingredient is Glyceryl Stearate SE ("self-emulsifying"). This just has a small amount of sodium or potassium stearate added so it can emulsify without a co-emulsifier.
Since this ingredient is an ester of a C18 fatty acid, it may not be fungal acne safe. The Malassezia yeast can potentially metabolize within the C11-C24 range.
Fun fact: The human body also creates Glyceryl Stearate naturally.
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.
Phytosphingosine is a phospholipid naturally found in our skin as a building block for ceramides.. It helps moisturize, soothe, and protect skin.
Phytosphingosine contributes to your skin's natural moisturizing factor (NMF). The NMF is responsible for hydration, a strong barrier, and plasticity. Our NMF decreases with age. Increasing NMF leads to more healthy and hydrated skin.
Studies show products formulated with NMF ingredients help strengthen our skin's barrier. Having a healthy skin barrier reduces irritation and increases hydration. Our skin barrier is responsible for having plump and firm skin. It also helps protect our skin against infection, allergies, and inflammation.
Fun fact: Phytosphingosine is abundant in plants and fungi.
More ingredients that help boost collagen in skin:
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!
Xanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.
On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.
Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.