Skin science article
Charlotte Tilbury Magic Cream Moisturizer Versus Paula's Choice Defense Essential Glow Moisturizer SPF 30
Charlotte Tilbury Magic Cream Moisturizer Versus Paula's Choice Defense Essential Glow Moisturizer SPF 30 This anti-aging moisturizer is formulated around Butyrospermum Parkii Butter and Sodium Hyaluronate to soften the look of wrinkles and hydrate skin. This
Charlotte Tilbury Magic Cream Moisturizer Versus Paula's Choice Defense Essential Glow Moisturizer SPF 30
This anti-aging moisturizer is formulated around Butyrospermum Parkii Butter and Sodium Hyaluronate to soften the look of wrinkles and hydrate skin.
This brightening moisturizer is formulated around Glycyrrhiza Glabra Root Extract and Tetrapeptide-30 to brighten dull-looking skin and fade the look of dark spots.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
C12-15 Alkyl Benzoate
Glyceryl Stearate Se
Butylene Glycol
Glycerin
Isononyl Isononanoate
Caprylic/Capric Triglyceride
Cetyl Alcohol
Ethylhexyl Palmitate
Cyclopentasiloxane
Dimethicone
Polyester-7
Phenoxyethanol
Neopentyl Glycol Diheptanoate
Hydrogenated Rapeseed Oil
Butyrospermum Parkii Butter
Steareth-21
Avena Sativa Kernel Extract
Carbomer
Dimethiconol
Potassium Cetyl Phosphate
Chlorphenesin
Caprylyl Glycol
Xanthan Gum
Hydrolyzed Viola Tricolor Extract
Allantoin
Aloe Barbadensis Leaf Juice Powder
Disodium EDTA
Tocopheryl Acetate
Camellia Oleifera Seed Oil
Rosa Canina Fruit Oil
Rosa Damascena Extract
Sodium Hydroxide
Helianthus Annuus Seed Oil
Michelia Alba Leaf Oil
Sodium Lactate
PEG-8
Ethylhexylglycerin
Coco-Glucoside
Sodium Hyaluronate
Tocopherol
Ascorbyl Palmitate
Plumeria Rubra Flower Extract
Ascorbic Acid
Citric Acid
Palmitoyl Tripeptide-1
Palmitoyl Tetrapeptide-7
Hydrolyzed Vegetable Protein
Citronellol
Geraniol
Linalool
Water, C12-15 Alkyl Benzoate, Glyceryl Stearate Se, Butylene Glycol, Glycerin, Isononyl Isononanoate, Caprylic/Capric Triglyceride, Cetyl Alcohol, Ethylhexyl Palmitate, Cyclopentasiloxane, Dimethicone, Polyester-7, Phenoxyethanol, Neopentyl Glycol Diheptanoate, Hydrogenated Rapeseed Oil, Butyrospermum Parkii Butter, Steareth-21, Avena Sativa Kernel Extract, Carbomer, Dimethiconol, Potassium Cetyl Phosphate, Chlorphenesin, Caprylyl Glycol, Xanthan Gum, Hydrolyzed Viola Tricolor Extract, Allantoin, Aloe Barbadensis Leaf Juice Powder, Disodium EDTA, Tocopheryl Acetate, Camellia Oleifera Seed Oil, Rosa Canina Fruit Oil, Rosa Damascena Extract, Sodium Hydroxide, Helianthus Annuus Seed Oil, Michelia Alba Leaf Oil, Sodium Lactate, PEG-8, Ethylhexylglycerin, Coco-Glucoside, Sodium Hyaluronate, Tocopherol, Ascorbyl Palmitate, Plumeria Rubra Flower Extract, Ascorbic Acid, Citric Acid, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7, Hydrolyzed Vegetable Protein, Citronellol, Geraniol, Linalool
Zinc Oxide
Titanium Dioxide
Cetearyl Alcohol
Glyceryl Stearate
Glycyrrhiza Glabra Root Extract
Actinidia Chinensis Fruit Extract
Argania Spinosa Kernel Oil
Tetrapeptide-30
Linoleic Acid
Resveratrol
Ascorbyl Glucoside
Niacinamide
Magnesium Ascorbyl Phosphate
Bisabolol
Phospholipids
Lecithin
Glycine Soja Sterols
Xanthophylls
Pullulan
Sodium Gluconate
Sclerotium Gum
Alumina
Triethoxycaprylylsilane
C13-14 Isoparaffin
Acrylates Copolymer
Polyhydroxystearic Acid
Polyacrylamide
Ceteareth-20
Aluminum Stearate
Laureth-7
Water, C12-15 Alkyl Benzoate, Zinc Oxide, Titanium Dioxide, Glycerin, Isononyl Isononanoate, Butylene Glycol, Cetearyl Alcohol, Potassium Cetyl Phosphate, Dimethicone, Glyceryl Stearate, Glycyrrhiza Glabra Root Extract, Actinidia Chinensis Fruit Extract, Argania Spinosa Kernel Oil, Tetrapeptide-30, Linoleic Acid, Resveratrol, Ascorbyl Glucoside, Niacinamide, Tocopheryl Acetate, Magnesium Ascorbyl Phosphate, Bisabolol, Tocopherol, Phospholipids, Lecithin, Glycine Soja Sterols, Xanthophylls, Pullulan, Sodium Gluconate, Xanthan Gum, Sclerotium Gum, Alumina, Caprylic/Capric Triglyceride, Citric Acid, Triethoxycaprylylsilane, C13-14 Isoparaffin, Acrylates Copolymer, Polyhydroxystearic Acid, Caprylyl Glycol, Polyacrylamide, Ceteareth-20, Aluminum Stearate, Laureth-7, Ethylhexylglycerin, Phenoxyethanol
Reviews
Alternatives
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.
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).
Citric Acid is an alpha hydroxy acid (AHA) naturally found in citrus fruits like oranges, lemons, and limes.
Like other AHAs, citric acid can exfoliate skin by breaking down the bonds that hold dead skin cells together. This helps reveal smoother and brighter skin underneath.
However, this exfoliating effect only happens at high concentrations (20%) which can be hard to find in cosmetic products.
Due to this, citric acid is usually included in small amounts as a pH adjuster. This helps keep products slightly more acidic and compatible with skin's natural pH.
In skincare formulas, citric acid can:
While it can provide some skin benefits, research shows lactic acid and glycolic acid are generally more effective and less irritating exfoliants.
Most citric acid used in skincare today is made by fermenting sugars (usually from molasses). This synthetic version is identical to the natural citrus form but easier to stabilize and use in formulations.
Rosacea skin has a lower threshold for acids generally, with 62.5% of rosacea subjects in one study reacting to lactic acid in a sting test. This is why we mark citric acid as a potential rosacea trigger.
However, this ingredient shows up as a pH adjuster or chelator at roughly 0.1-1% in many products. These low levels are unlikely to be an issue for rosacea skin and becomes a potential trigger at exfoliating concentrations (20%). Because everybody's skin is unique, we recommend a patch test if you are unsure.
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.
Ethylhexylglycerin is created from glycerin. It is a multitasker ingredient that:
The CIR Expert Panel found minimal skin absorption or sensitization of any kind in a safety assessment. Though this ingredient is considered well-tolerated, a small number of cases of allergic dermatitis have been published since 2002. Just be sure to patch test if you are unsure.
Industry-reported use ranges from 8% in rinse-off products and 2% in leave-on formulations.
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.
Isononyl Isononanoate is a synthetic skin-conditioner and texture enhancer. It is created from nonanoic acid, a fatty acid found in cocoa and lavender oil.
As an emollient, Isononyl Isononanoate helps keep your skin soft and smooth. This is because emollients create a barrier on the skin to trap moisture in.
Isononyl Isononanoate helps give products a velvet feel and improves spreadability.
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.
Potassium Cetyl Phosphate is the potassium salt of a mixture. This mixture consists of the esters from phosphoricacid and cetyl alcohol.
Potassium Cetyl Phosphate is an emulsifier and cleansing agent. Emulsifiers help stabilize a product. It does this by preventing certain ingredients from separating.
As a cleansing agent, Potassium Cetyl Phosphate helps gather oils, dirts, and pollutants from your skin. This makes it easier to rinse them away with water.
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.
Tocopheryl Acetate is a stable, shelf-friendly form of vitamin E.
Formulators love it because plain vitamin E oxidizes quickly once it hits air. This acetate version stays stable and resists going off, helping to extend a product's shelf life.
It's actually inactive on its own and works like a slow-release "storage" form; the enzymes in your skin called esterases gradually convert it into active vitamin E over time.
One in vivo study showed 5% of the acetate in the living layer of the epidermis converted to vitamin E after 5 days of application. This study also found the skin gained protection against UV damage even though the conversion was slow and small.
Once converted, vitamin E acts as a skin's main fat-soluble antioxidant that fights free radicals to protect skin from damage.
Topical vitamin E generally boosts the skin's photoprotection, and it reduced UV-damage in animal models.
Overall, it has a pretty solid safety profile and has been found to be non-irritating and non-comedogenic. Allergic reactions may happen but stay rare due to how widely the ingredient gets used.
The concentration will vary depending on the formula; industry data shows 0.1% in baby lotions, 3% in lipsticks, and 5% in foot powders. You can also find this ingredient at 100% in a pure vitamin E oil.
Most leave-on skincare keeps it at the lower end, often between 0.5-1%.
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.