The INKEY List Collagen Peptide Serum Versus COSRX The 6 Peptide Skin Booster Serum
Updated on June 28, 2024
Overview
What they are
These products are both cruelty-free and reef safe serums. They have a total of 5 ingredients in common
Cool Features
They both contain hyaluronic acid and peptides
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, oily skin, reducing pores, scar healing and better texture
Free From
They both do not contain any common allergens, parabens, silicones 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
The INKEY List Collagen Peptide Serum 20 ingredients
COSRX The 6 Peptide Skin Booster Serum 44 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
The INKEY List Collagen Peptide Serum 20 ingredients
COSRX The 6 Peptide Skin Booster Serum 44 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningGlycerin
Humectant
Butylene Glycol
Humectant
Propanediol
SolventPhenoxyethanol
Preservative
Hydroxyethylcellulose
Emulsion StabilisingSodium Phytate
Citric Acid
Buffering
Leuconostoc/Radish Root Ferment Filtrate
Antimicrobial
Carbomer
Emulsion StabilisingHyaluronic Acid
Humectant
Sodium Lactate
BufferingPalmitoyl Dipeptide-5 Diaminobutyroyl Hydroxythreonine
Skin Conditioning
Palmitoyl Dipeptide-5 Diaminohydroxybutyrate
Skin Conditioning
Polysorbate 20
Emulsifying
Polysorbate 60
Emulsifying
Disodium Phosphate
BufferingSodium Phosphate
BufferingPalmitoyl Tetrapeptide-7
Skin Conditioning
Palmitoyl Tripeptide-1
Skin Conditioning
Water, Glycerin, Butylene Glycol, Propanediol, Phenoxyethanol, Hydroxyethylcellulose, Sodium Phytate, Citric Acid, Leuconostoc/Radish Root Ferment Filtrate, Carbomer, Hyaluronic Acid, Sodium Lactate, Palmitoyl Dipeptide-5 Diaminobutyroyl Hydroxythreonine, Palmitoyl Dipeptide-5 Diaminohydroxybutyrate, Polysorbate 20, Polysorbate 60, Disodium Phosphate, Sodium Phosphate, Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-1
Water
Skin ConditioningDipropylene Glycol
MaskingGlycerin
Humectant
Pentylene Glycol
Skin Conditioning1,2-Hexanediol
Skin ConditioningNiacinamide
Smoothing
Acetyl Hexapeptide-8
Humectant
Copper Tripeptide-1
Skin Conditioning
Sh-Polypeptide-121
Skin Conditioning
Dipeptide Diaminobutyroyl Benzylamide Diacetate
Skin Conditioning
Oligopeptide-68
Bleaching
Palmitoyl Tripeptide-8
Skin Conditioning
Allantoin
Skin Conditioning
Sodium Hyaluronate
Humectant
Acetyl Glucosamine
Skin ConditioningSerine
MaskingAlanine
MaskingGlycine
Buffering
Threonine
Arginine
Masking
Proline
Skin ConditioningBetaine
Humectant
Sodium PCA
HumectantSodium Lactate
BufferingPCA
HumectantGlutamic Acid
HumectantLysine Hcl
Skin Conditioning
Tocopherol
Antioxidant
Dextran
Glycine Soja Oil
Emollient
Hydrogenated Lecithin
EmulsifyingAmmonium Acryloyldimethyltaurate/Vp Copolymer
Polyacrylate Crosspolymer-6
Emulsion StabilisingButylene Glycol
Humectant
Xanthan Gum
EmulsifyingEthylhexylglycerin
Skin ConditioningAdenosine
Skin Conditioning
Polyquaternium-51
Skin ConditioningDisodium EDTA
Citric Acid
Buffering
Caprylyl Glycol
EmollientT-Butyl Alcohol
Perfuming
Potassium Sorbate
Preservative
Sodium Oleate
CleansingWater, Dipropylene Glycol, Glycerin, Pentylene Glycol, 1,2-Hexanediol, Niacinamide, Acetyl Hexapeptide-8, Copper Tripeptide-1, Sh-Polypeptide-121, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Oligopeptide-68, Palmitoyl Tripeptide-8, Allantoin, Sodium Hyaluronate, Acetyl Glucosamine, Serine, Alanine, Glycine, Threonine, Arginine, Proline, Betaine, Sodium PCA, Sodium Lactate, PCA, Glutamic Acid, Lysine Hcl, Tocopherol, Dextran, Glycine Soja Oil, Hydrogenated Lecithin, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Polyacrylate Crosspolymer-6, Butylene Glycol, Xanthan Gum, Ethylhexylglycerin, Adenosine, Polyquaternium-51, Disodium EDTA, Citric Acid, Caprylyl Glycol, T-Butyl Alcohol, Potassium Sorbate, Sodium Oleate
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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. Stay hydrated!
Learn more about WaterGlycerin 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 GlycerinButylene Glycol (or BG) is used within cosmetic products for a few different reasons:
- It is a solvent, meaning that it helps to dissolve other ingredients. This also enhances the absorption of the product into one's skin.
- It is a humectant, which means that it helps attract moisture into the skin.
- It helps improve product application.
- It has mild preservative properties.
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
As an AHA, Citric Acid removes the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and even out skin tone.
If you spot Citric Acid near the end of an ingredient list, it's likely there as a pH adjuster rather than an active ingredient.
Read more about some other popular AHA's here:
Learn more about Citric AcidSodium Lactate is the sodium salt of lactic acid, an AHA. It is a humectant and sometimes used to adjust the pH of a product.
This ingredient is part of our skin's NMF, or natural moisturizing factor. Our NMF is essential for the hydration of our top skin layers and plasticity of skin. NMF also influences our skin's natural acid mantle and pH, which protects our skin from harmful bacteria.
High percentages of Sodium Lactate can have an exfoliating effect.
Fun fact: Sodium Lactate is produced from fermented sugar.
Learn more about Sodium LactateIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
The INKEY List Collagen Peptide Serum 20 ingredients
COSRX The 6 Peptide Skin Booster Serum 44 ingredients
Reviews
Here's what our community thinks
COSRX The 6 Peptide Skin Booster Serum 44 ingredients
I was breaking out for 3 months and had no idea what was going on. Then my mom mentioned she’s getting small bumps around her jawline from another peptide serum (Skin1004) and it clicked. Stopped using it week ago and didn’t get a single pimple.
Didn’t see any positive results.
No difference seen so far as i started last week, goes on nice and absorbs fast, no scent whatsoever and pretty hydrating
EDIT: GAVE ME CLOSED COMONDONES LIKE THE OTHER REVIEWER. DONT USE.
