What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningGlycerin
HumectantButylene Glycol
HumectantPropanediol
SolventMethyl Gluceth-20
HumectantPEG-75
HumectantSerine
MaskingBetaine
HumectantSodium Citrate
BufferingDipotassium Glycyrrhizate
HumectantPEG-50 Hydrogenated Castor Oil Triisostearate
EmulsifyingPhytosteryl/Octyldodecyl Lauroyl Glutamate
Skin ConditioningPhenoxyethanol
PreservativeArginine
MaskingCitric Acid
BufferingPEG-60 Hydrogenated Castor Oil
EmulsifyingTocopherol
AntioxidantSodium PCA
HumectantAlanine
MaskingLysine Hcl
Skin ConditioningPCA Ethyl Cocoyl Arginate
MoisturisingGlycine
BufferingCeteth-20
CleansingThreonine
Valine
MaskingHistidine
HumectantProline
Skin ConditioningLeucine
Skin ConditioningPentasodium Pentetate
Carnosine
Skin ConditioningPolyquaternium-61
Skin Conditioning1,2-Hexanediol
Skin ConditioningHydrogenated Lecithin
EmulsifyingPolyglyceryl-10 Laurate
Skin ConditioningSodium Hyaluronate
HumectantHydrolyzed Hyaluronic Acid
HumectantWater, Glycerin, Butylene Glycol, Propanediol, Methyl Gluceth-20, PEG-75, Serine, Betaine, Sodium Citrate, Dipotassium Glycyrrhizate, PEG-50 Hydrogenated Castor Oil Triisostearate, Phytosteryl/Octyldodecyl Lauroyl Glutamate, Phenoxyethanol, Arginine, Citric Acid, PEG-60 Hydrogenated Castor Oil, Tocopherol, Sodium PCA, Alanine, Lysine Hcl, PCA Ethyl Cocoyl Arginate, Glycine, Ceteth-20, Threonine, Valine, Histidine, Proline, Leucine, Pentasodium Pentetate, Carnosine, Polyquaternium-61, 1,2-Hexanediol, Hydrogenated Lecithin, Polyglyceryl-10 Laurate, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid
Water
Skin ConditioningCaprylic/Capric Triglyceride
MaskingCetyl Ethylhexanoate
EmollientIsodecyl Neopentanoate
EmollientGlycerin
HumectantPropanediol
SolventPolyglyceryl-6 Polyricinoleate
EmulsifyingHydrogenated Vegetable Oil
EmollientPolyglyceryl-2 Isostearate
EmulsifyingIsosorbide Dicaprylate
Skin ConditioningDisteardimonium Hectorite
StabilisingPhytosteryl Canola Glycerides
Skin ConditioningGlycosphingolipids
EmollientGlycolipids
Skin ConditioningLinoleic Acid
CleansingOleic Acid
EmollientPalmitic Acid
EmollientStearic Acid
CleansingArginine
MaskingGlycine
BufferingAlanine
MaskingSerine
MaskingProline
Skin ConditioningThreonine
Glutamic Acid
HumectantLysine Hcl
Skin ConditioningBetaine
HumectantXylitylglucoside
HumectantAnhydroxylitol
HumectantXylitol
HumectantGlucose
HumectantMaltose
MaskingFructose
HumectantTrehalose
HumectantSodium PCA
HumectantPCA
HumectantSodium Lactate
BufferingUrea
BufferingAllantoin
Skin ConditioningSodium Hyaluronate
HumectantLecithin
EmollientTriolein
Skin ConditioningDimethyl Isosorbide
SolventPentylene Glycol
Skin ConditioningTocopherol
AntioxidantHydroxymethoxyphenyl Decanone
Skin ConditioningCitric Acid
BufferingTrisodium Ethylenediamine Disuccinate
Magnesium Sulfate
Sodium Chloride
MaskingSodium Hydroxide
BufferingPhenoxyethanol
PreservativeChlorphenesin
AntimicrobialWater, Caprylic/Capric Triglyceride, Cetyl Ethylhexanoate, Isodecyl Neopentanoate, Glycerin, Propanediol, Polyglyceryl-6 Polyricinoleate, Hydrogenated Vegetable Oil, Polyglyceryl-2 Isostearate, Isosorbide Dicaprylate, Disteardimonium Hectorite, Phytosteryl Canola Glycerides, Glycosphingolipids, Glycolipids, Linoleic Acid, Oleic Acid, Palmitic Acid, Stearic Acid, Arginine, Glycine, Alanine, Serine, Proline, Threonine, Glutamic Acid, Lysine Hcl, Betaine, Xylitylglucoside, Anhydroxylitol, Xylitol, Glucose, Maltose, Fructose, Trehalose, Sodium PCA, PCA, Sodium Lactate, Urea, Allantoin, Sodium Hyaluronate, Lecithin, Triolein, Dimethyl Isosorbide, Pentylene Glycol, Tocopherol, Hydroxymethoxyphenyl Decanone, Citric Acid, Trisodium Ethylenediamine Disuccinate, Magnesium Sulfate, Sodium Chloride, Sodium Hydroxide, Phenoxyethanol, Chlorphenesin
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Alanine is an amino acid and is already found in the human body. Our skin uses alanine to build collagen, elastin, and keratin.
Arginine is a semi-essential amino acid. This just means our bodies can product a bit on its own, but sometimes needs a little boost from food sources.
It is a part of your skin's natural moisturizing factor (NMF), or the water-loving molecules in your outermost layer of skin (stratum corneum) that keeps everything hydrated and happy.
Here's an interesting thing about Arginine: your skin converts it into urea through the Krebs-Henseleit urea cycle. Urea is one of the most effective humectants your skin naturally produces.
A clinical study showed applying 2.5% arginine hydrochloride to atopic dermatitis skin showed significant urea levels in the stratum corneum and improved moisture in just four weeks.
Arginine is also a precursor to nitric oxide; nitric oxide improves microcirculation and supports wound healing and collagen synthesis.
One study found that an amino acid complex containing Arginine reduced skin irritation, improved hydration, and accelerated skin repair in clinical / in-vivo studies.
Arginine itself is an amino acid and not a fatty acid, oil, or ester. On its own, it's not a direct food source for Malassezia, or the yeast that causes fungal acne.
Learn more about ArginineBetaine is a humectant. Like hyaluronic acid, it helps attract and retain moisture in the skin. It’s known for being gentle and for helping the skin maintain balanced hydration.
Betaine is mainly used to improve hydration and support calmer skin. It helps skin cells regulate water balance because it functions as an osmolyte.
Some studies suggest betaine may support making skin tone more even.
Fun fact: Betaine naturally exists in the skin and the body. In cosmetic products, it can be either plant-derived (most commonly from sugar beets) or synthetically produced for consistency and stability.
Betaine is also known as trimethylglycine.
Learn more about BetaineCitric 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.
Read more about some other popular AHA's here:
Learn more about Citric AcidGlycerin (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.
Learn more about GlycerinGlycine is the smallest amino acid and a key building block of collagen. It's part if your skin's Natural Moisturizing Factor (NMF), or the water-loving molecules in your outermost layer of skin (stratum corneum) that keeps everything hydrated and happy.
A study from 2022 found that an amino acid complex featuring taurine, arginine, and glycine significantly reduced skin irritation, improved redness, and accelerated the skin repair process.
Lysine HCl is an alpha amino acid salt.
Our skin uses amino acids as a precursor for building protein, and therefore keratins, collagen and elastin.
Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.
It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.
Proline is a non-essential amino acid, meaning your body can make it on its own. In skincare, it is a skin conditioning ingredient that keeps skin soft and hydrated.
It makes up about 23% of the collagen molecule (collagen is the protein responsible for keeping your skin firm) and is involved in your skin's natural hyaluronic acid production. When applied topically, proline can penetrate the skin fairly well due to its small molecular size.
Reviews of this ingredient have found it to be neither a dermal irritant nor a sensitizer.
Fun fact: Proline can be found in protein-rich foods like meat, fish, eggs, and dairy.
Learn more about ProlinePropanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.Â
It’s often used to:
Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
Learn more about PropanediolSerine is a non-essential amino acid (your body makes it on its own!). It is a major player in your skin's natural moisturizing factor (NMF), or the water-loving molecules in your outermost layer of skin (stratum corneum) that keeps everything hydrated and happy.
Serine is one of your NMF's most abundant components that works as a skin-identical humectant. Its hydroxyl group grabs onto water molecules to boost hydration without any heaviness or occlusion.
Research on a hydrogel with serine confirmed this serine got delivered to your stratum corneum and demonstrated enhanced skin moisturization.
Interestingly serine also helps your skin produce filaggrin, a protein that keeps your skin barrier strong and used to create collagen.
Learn more about SerineSodium Hyaluronate is the salt form of hyaluronic acid. It is a long sugar chain that is naturally found in your skin, joints, and connective tissue that maintains hydration and elasticity.
In skincare, it works as a humectant. It pulls water from the environment and deeper layers of skin and binds it to the surface.
Interestingly, the size of the molecule affects its behavior:
Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair.
Many serums use a blend of both weights so you can get surface hydration plus longer-lasting and deeper effects.
You'll typically see concentrations between 0.1-2% for this ingredient.
Learn more about Sodium HyaluronateSodium PCA is the sodium salt of pyroglutamic acid. It is naturally occurring in our skin's natural moisturizing factors where it works to maintain hydration.
The PCA stands for pyrrolidone carboxylic acid, a natural amino acid derivative.
This ingredient has skin conditioning, anti-inflammatory, and humectant properties. Humectants help hydrate your skin by drawing moisture from the air. This helps keep your skin moisturized.
Learn more about Sodium PCAThreonine is an amino-acid. It helps hydrate the skin and has antioxidant benefits.
Our skin uses threonine for creating collagen and elastin. Humans are not able to create threonine and must get it through eating foods such as fish, lentils, poultry, sesame seeds, and more.
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.
Learn more about TocopherolWater. 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!
Learn more about Water