COSRX Oil Free Ultra Moisturizing Lotion with Birch Sap Versus Tatcha The Silk Serum
Updated on July 18, 2023
Overview
What they are
These products are both cruelty-free and reef safe . They have a total of 6 ingredients in common
Suited For
They're both likely to be good for dry skin, brightening skin, sensitive skin, scar healing and dark spots
Free From
They both do not contain any harsh alcohols, parabens or sulfates
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
COSRX Oil Free Ultra Moisturizing Lotion with Birch Sap 19 ingredients
Tatcha The Silk Serum 46 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
COSRX Oil Free Ultra Moisturizing Lotion with Birch Sap 19 ingredients
Tatcha The Silk Serum 46 ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Betula Platyphylla Japonica Juice
Skin Conditioning
Butylene Glycol
Humectant
Glycerin
Humectant
Dimethicone
Emollient
Betaine
Humectant
Cetearyl Alcohol
Emollient
1,2-Hexanediol
Skin Conditioning
Cetearyl Olivate
Sorbitan Olivate
Emulsifying
Ethylhexylglycerin
Skin ConditioningHydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Emulsion StabilisingEthyl Hexanediol
SolventXanthan Gum
EmulsifyingAllantoin
Skin Conditioning
Panthenol
Skin Conditioning
Sodium Hyaluronate
Humectant
Sodium Lactate
Buffering4-Terpineol
Masking
Water
Skin ConditioningBetula Platyphylla Japonica Juice, Butylene Glycol, Glycerin, Dimethicone, Betaine, Cetearyl Alcohol, 1,2-Hexanediol, Cetearyl Olivate, Sorbitan Olivate, Ethylhexylglycerin, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Ethyl Hexanediol, Xanthan Gum, Allantoin, Panthenol, Sodium Hyaluronate, Sodium Lactate, 4-Terpineol, Water
Water
Skin ConditioningSaccharomyces/Rice Ferment Filtrate
Skin Conditioning
Glycerin
Humectant
Betaine
Humectant
Pentylene Glycol
Skin ConditioningCaprylic/Capric Triglyceride
Masking
Propanediol
Solvent
Vaccinium Macrocarpon Fruit Extract
AstringentCrithmum Maritimum Extract
Skin ConditioningCamellia Sinensis Leaf Extract
Antimicrobial
Cladosiphon Okamuranus Extract
Skin ConditioningSqualane
Emollient
Sericin
Skin ConditioningMorus Alba Leaf Extract
Skin ConditioningHydrolyzed Silk
Humectant
Carthamus Tinctorius Seed Oil
Masking
Tetrapeptide-4
Skin Conditioning
Polyglyceryl-10 Stearate
Skin Conditioning
Diglucosyl Gallic Acid
Helianthus Annuus Seed Oil
Emollient
Hydrolyzed Conchiolin Protein
Skin ConditioningCaprylyl Glycol
EmollientAcrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingPrunus Amygdalus Dulcis Oil
Skin Conditioning
Citrus Aurantium Bergamia Fruit Oil
Masking
Citrus Limon Peel Oil
Masking
Citrus Latifolia Peel Oil
Masking
Lavandula Angustifolia Oil
Masking
Ocimum Basilicum Oil
Masking
Eucalyptus Globulus Leaf Oil
Perfuming
Juniperus Virginiana Oil
Masking
Amyris Balsamifera Bark Oil
Masking
1,2-Hexanediol
Skin Conditioning
Butylene Glycol
Humectant
Sodium Citrate
BufferingCitric Acid
Buffering
Disodium EDTA
Potassium Hydroxide
BufferingSynthetic Fluorphlogopite
Tin Oxide
Abrasive
Citral
Perfuming
Limonene
Perfuming
Linalool
Perfuming
Ethylhexylglycerin
Skin ConditioningPhenoxyethanol
Preservative
CI 77891
Cosmetic ColorantWater, Saccharomyces/Rice Ferment Filtrate, Glycerin, Betaine, Pentylene Glycol, Caprylic/Capric Triglyceride, Propanediol, Vaccinium Macrocarpon Fruit Extract, Crithmum Maritimum Extract, Camellia Sinensis Leaf Extract, Cladosiphon Okamuranus Extract, Squalane, Sericin, Morus Alba Leaf Extract, Hydrolyzed Silk, Carthamus Tinctorius Seed Oil, Tetrapeptide-4, Polyglyceryl-10 Stearate, Diglucosyl Gallic Acid, Helianthus Annuus Seed Oil, Hydrolyzed Conchiolin Protein, Caprylyl Glycol, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Prunus Amygdalus Dulcis Oil, Citrus Aurantium Bergamia Fruit Oil, Citrus Limon Peel Oil, Citrus Latifolia Peel Oil, Lavandula Angustifolia Oil, Ocimum Basilicum Oil, Eucalyptus Globulus Leaf Oil, Juniperus Virginiana Oil, Amyris Balsamifera Bark Oil, 1,2-Hexanediol, Butylene Glycol, Sodium Citrate, Citric Acid, Disodium EDTA, Potassium Hydroxide, Synthetic Fluorphlogopite, Tin Oxide, Citral, Limonene, Linalool, Ethylhexylglycerin, Phenoxyethanol, CI 77891
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservatives
Betaine is a common humectant (a substance that promotes retention of moisture). It's known to be gentle on the skin and can help balance hydration.
This ingredient is best for improving hydration and soothing irritated skin. Studies also show it helps even out skin tone.
Fun fact: Betaine is naturally created in the skin and body. The kind found within cosmetic products can be either plant-derived or synthetic.
Learn more about BetaineButylene 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.
Learn more about Butylene GlycolEthylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.
You might see Ethylhexylglycerin often paired with other preservatives such as phenoxyethanol. Ethylhexylglycerin has been found to increase the effectiveness of these other preservatives.
Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.
A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.
As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.
Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.
Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.
In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.
This ingredient is organic, colorless, odorless, and non-toxic.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinWater. 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. Stay hydrated!
Learn more about WaterIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
COSRX Oil Free Ultra Moisturizing Lotion with Birch Sap 19 ingredients
Tatcha The Silk Serum 46 ingredients
Reviews
Here's what our community thinks
