Skin science article
Olehenriksen Banana Bright Vitamin C Serum Versus Paula's Choice C5 Super Boost Moisturizer
Olehenriksen Banana Bright Vitamin C Serum Versus Paula's Choice C5 Super Boost Moisturizer This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid and Potassium Azeloyl Diglycinate to brighten dull-looking skin and fade the look of dark spots. Thi
Olehenriksen Banana Bright Vitamin C Serum Versus Paula's Choice C5 Super Boost Moisturizer
This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid and Potassium Azeloyl Diglycinate to brighten dull-looking skin and fade the look of dark spots.
This brightening moisturizer is formulated around 3-O-Ethyl Ascorbic Acid and Ascorbyl Glucoside to brighten dull-looking skin.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Squalane
Dimethicone
Cetearyl Alcohol
Glycerin
Caprylic/Capric Triglyceride
Isododecane
Polymethylsilsesquioxane
Mica
Coconut Alkanes
CI 77891
Sclerocarya Birrea Seed Oil
Dilinoleic Acid/Propanediol Copolymer
3-O-Ethyl Ascorbic Acid
Cetearyl Methicone
Silica
Phenoxyethanol
Cetearyl Glucoside
Xylitylglucoside
Dimethicone/Vinyltrimethylsiloxysilicate Crosspolymer
Anhydroxylitol
Microcrystalline Cellulose
Potassium Cetyl Phosphate
Stevioside
Polysilicone-11
Coco-Caprylate/Caprate
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Xylitol
Tocopherol
Parfum
Potassium Azeloyl Diglycinate
CI 77491
Dipotassium Glycyrrhizate
Ethylhexylglycerin
Glucose
Xanthan Gum
Sodium Citrate
Citrus Aurantium Dulcis Fruit Extract
Citrus Limon Fruit Extract
Hippophae Rhamnoides Extract
Lycium Barbarum Fruit Extract
Rosa Canina Fruit Extract
Sodium Hydroxide
Leuconostoc/Radish Root Ferment Filtrate
Polysorbate 60
Sorbitan Isostearate
Ascorbic Acid
Aroma
Sodium Chloride
Citral
Limonene
Linalool
Water, Squalane, Dimethicone, Cetearyl Alcohol, Glycerin, Caprylic/Capric Triglyceride, Isododecane, Polymethylsilsesquioxane, Mica, Coconut Alkanes, CI 77891, Sclerocarya Birrea Seed Oil, Dilinoleic Acid/Propanediol Copolymer, 3-O-Ethyl Ascorbic Acid, Cetearyl Methicone, Silica, Phenoxyethanol, Cetearyl Glucoside, Xylitylglucoside, Dimethicone/Vinyltrimethylsiloxysilicate Crosspolymer, Anhydroxylitol, Microcrystalline Cellulose, Potassium Cetyl Phosphate, Stevioside, Polysilicone-11, Coco-Caprylate/Caprate, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Xylitol, Tocopherol, Parfum, Potassium Azeloyl Diglycinate, CI 77491, Dipotassium Glycyrrhizate, Ethylhexylglycerin, Glucose, Xanthan Gum, Sodium Citrate, Citrus Aurantium Dulcis Fruit Extract, Citrus Limon Fruit Extract, Hippophae Rhamnoides Extract, Lycium Barbarum Fruit Extract, Rosa Canina Fruit Extract, Sodium Hydroxide, Leuconostoc/Radish Root Ferment Filtrate, Polysorbate 60, Sorbitan Isostearate, Ascorbic Acid, Aroma, Sodium Chloride, Citral, Limonene, Linalool
Dicaprylyl Carbonate
Butylene Glycol
Polyglyceryl-6 Distearate
Ascorbyl Glucoside
Acetyl Sh-Hexapeptide-5 Amide Acetate
Citrullus Lanatus Seed Oil
Hydrogenated Lecithin
Theobroma Cacao Seed Butter
Hydrogenated Phosphatidylcholine
Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
Sodium Hyaluronate
Oryza Sativa Bran Extract
Propanediol
Jojoba Esters
Acetyl Zingerone
Cetyl Palmitate
Caprylyl Glycol
Cetyl Alcohol
Polyglyceryl-3 Beeswax
Sorbitan Olivate
Sorbitan Palmitate
Helianthus Annuus Extract
Hexylene Glycol
Sodium Phytate
Lecithin
Rosmarinus Officinalis Leaf Extract
Glycine Soja Oil
Lysolecithin
Bacillus Ferment
Citric Acid
Polyglutamic Acid
Beta-Sitosterol
Phytic Acid
Squalene
Sodium Benzoate
Potassium Sorbate
Water, Dicaprylyl Carbonate, 3-O-Ethyl Ascorbic Acid, Dimethicone, Butylene Glycol, Polyglyceryl-6 Distearate, Ascorbyl Glucoside, Squalane, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Acetyl Sh-Hexapeptide-5 Amide Acetate, Citrullus Lanatus Seed Oil, Hydrogenated Lecithin, Theobroma Cacao Seed Butter, Hydrogenated Phosphatidylcholine, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Sodium Hyaluronate, Oryza Sativa Bran Extract, Propanediol, Jojoba Esters, Tocopherol, Acetyl Zingerone, Cetyl Palmitate, Caprylyl Glycol, Cetyl Alcohol, Polyglyceryl-3 Beeswax, Sodium Hydroxide, Sorbitan Olivate, Sorbitan Palmitate, Helianthus Annuus Extract, Ethylhexylglycerin, Hexylene Glycol, Sodium Phytate, Polysorbate 60, Sorbitan Isostearate, Lecithin, Rosmarinus Officinalis Leaf Extract, Glycine Soja Oil, Lysolecithin, Bacillus Ferment, Citric Acid, Polyglutamic Acid, Beta-Sitosterol, Phytic Acid, Squalene, Phenoxyethanol, Sodium Benzoate, Potassium Sorbate
Reviews
Be the first to review
Alternatives
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
3-O-Ethyl Ascorbic Acid is one of the most popular "stable" vitamin C derivatives in skincare.
Plain ascorbic acid is fantastic but notoriously fragile; it browns, oxidizes, and loses potency fast. So attaching an ethyl group to the third carbon of the molecule gives it some cool perks:
In a formula, it does the 3 classic vitamin C jobs: it acts as an antioxidant, helps brighten skin tone by inhibiting tyrosinase, and supports collagen.
The evidence is reasonably solid for a cosmetic ingredient; Liao and colleagues (2018) showed it's significantly more stable than ascorbic acid while still being effective.
A 2021 study by Zerbinati and colleagues tested a serum with 30% 3-O-ethyl-l-ascorbic acid and 1% lactic acid significantly increased collagen production, reduced UVB-induced DNA damage, and decreased melanin on a reconstructed pigmented skin model.
Typical real world usage sits around 0.5-5% (and 1-2% is common for daily serums).
Amounts up to 30% have been shown to be non-irritating on human skin samples, but two isolated cases reported allergic contact dermatitis so a patch test is sensible if you have reactive skin.
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.
This is a synthetic polymer. It helps improve the texture of products by adding thickness and gel-like feel.
It is also an emulsifer, meaning it prevents ingredients such as oil and water from separating. It also helps evenly disperse other ingredients.
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.
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.
Sodium Hydroxide is also known as lye or caustic soda. It is used to adjust the pH of products; many ingredients require a specific pH to be effective.
In small amounts, sodium hydroxide is considered safe to use. However, large amounts may cause chemical burns due to its high alkaline.
Your skin has a natural pH and acid mantle. This acid mantle helps prevent harmful bacteria from breaking through. The acid mantle also helps keep your skin hydrated.
"Alkaline" refers to a high pH level. A low pH level would be considered acidic.
Sorbitan Isostearate is an emulsifer. It is created from isostearic acid and sorbitol.
As an emulsifier, it keeps the water and oil ingredients from separating. This keeps formulas stable and smooth.
In a 24 hour occlusive patch test on 56 subjects, 10% sorbitan isostearate was completely non-irritating. Most formulas use less than 10%.
Because it's a fatty acid ester, it may not be fungal acne safe since the Malassezia yeast can utilize it as a nutrient source.
Squalane is the hydrogenated and shelf-stable form of squalene (a lipid that naturally occurs in human sebum).
It is an emollient and skin conditioning agent that is able to integrate seamlessly into the skin's lipid barrier without clogging pores.
This is due to how structurally similar it is to what your skin already produces.
Though it is mostly an emollient that helps soften and hydrate skin, it also has some humectant and occlusive action. Humectants help the skin retain moisture while occlusives seal it in, making squalane a triple-threat moisturizer.
Research shows it has antioxidant capabilities that help protect against stressors like UV exposure, specifically UVA induced oxidative stress. This study also found that it supports collagen biosynthesis in human dermal fibroblasts.
No clinical study has reported significant adverse effects and irritation reactions are very rare from this ingredient (even at 100% concentration).
Overall, it's a fantastic ingredient for hydration and is suitable for all skin types.
This depends on the source. Squalane can be derived from both plants and animals. Most squalane used in skincare comes from plants.
Please note: the source of squalane is only known if disclosed by the brand. We recommend reaching out to the brand if you have any questions about their squalane.
Read more about squalene with an "e".
Though squalane is often called an oil, it’s technically not one. It is a hydrocarbon, meaning it is only made of carbon and hydrogen. True oils are triglycerides and made of fatty acids and glycerol.
The term “oil-free” isn’t regulated so companies can define it however they want. Some exclude all oils, while others just avoid mineral oil or comedogenic oils.
Squalane has a comedogenic rating of 1 from the original 1972 study that tested raw ingredients under occlusion on rabbit ears. This system is not standardized or peer-reviewed, and using the raw ingredients is very different from how diluted cosmetic formulations are used on human skin.
A comedogenic rating of 1 means it is "unlikely to clog pores" according to the original rating system.
The overall formula of a product matters more than the individual ingredients on whether or not it will cause clogged pores.
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!