Here's our complete breakdown comparing the ingredients, attributes, and more of COSRX The 6 Peptide Skin Booster Serum versus The Ordinary Multi-Peptide + HA Serum ("Buffet") .
Last updated on August 09, 2023. Published on August 28, 2023
Overview
What they are
These products are both cruelty-free and reef safe serums. They have a total of 21 ingredients in common
Cool Features
They both contain hyaluronic acid and peptides
Suited For
They're both likely to be good for dry skin, brightening skin, sensitive skin and scar healing
Free From
They both do not contain any common allergens, parabens, silicones or sulfates
What's Inside
They both contain oils
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.
Price
Ingredient Info
COSRX The 6 Peptide Skin Booster Serum 44 ingredients
The Ordinary Multi-Peptide + HA Serum ("Buffet") 51 ingredients
Contains Alcohol
Ingredients in this product that are types of alcohol:
Silicon Free
This product is free of silicons 🎉
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
EU Allergen Free
This product is free of EU allergens 🎉
Non Vegan
This product is not vegan 😥
Cruelty Free
This product is cruelty-free 🎉
Alcohol Free
This product is free of harsh alcohols 🎉
Silicon Free
This product is free of silicons 🎉
Fragrance Free
This product is free of fragrances 🎉
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
EU Allergen Free
This product is free of EU allergens 🎉
Vegan
This product is vegan 🎉
Cruelty Free
This product is cruelty-free 🎉
At a glance
Click on any of the items below to learn more
COSRX The 6 Peptide Skin Booster Serum 44 ingredients
The Ordinary Multi-Peptide + HA Serum ("Buffet") 51 ingredients
Notable Ingredients
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Benefits
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Concerns
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Benefits
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Concerns
This product contains 1 ingredient that may have this attribute:
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Join SkinSortIngredients Compared
Ingredients that are highlighted in purple are present in both products.
COSRX The 6 Peptide Skin Booster Serum 44 ingredients
The Ordinary Multi-Peptide + HA Serum ("Buffet") 51 ingredients
Water • 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
Water • Glycerin • Lactococcus Ferment Lysate • Acetyl Hexapeptide-8 • Pentapeptide-18 • Palmitoyl Tripeptide-1 • Palmitoyl Tetrapeptide-7 • Palmitoyl Tripeptide-38 • Dipeptide Diaminobutyroyl Benzylamide Diacetate • Acetylarginyltryptophyl Diphenylglycine • Sodium Hyaluronate Crosspolymer • Sodium Hyaluronate • Allantoin • Glycine • Alanine • Serine • Valine • Isoleucine • Proline • Threonine • Histidine • Phenylalanine • Arginine • Aspartic Acid • Trehalose • Fructose • Glucose • Maltose • Urea • Sodium PCA • PCA • Sodium Lactate • Citric Acid • Hydroxypropyl Cyclodextrin • Sodium Chloride • Sodium Hydroxide • Butylene Glycol • Pentylene Glycol • Acacia Senegal Gum • Xanthan Gum • Carbomer • Polysorbate 20 • Ppg-26-Buteth-26 • Peg-40 Hydrogenated Castor Oil • Trisodium Ethylenediamine Disuccinate • Ethoxydiglycol • Sodium Benzoate • Caprylyl Glycol • Ethylhexylglycerin • Phenoxyethanol • Chlorphenesin
Ingredients Side-by-side
Ingredients that are highlighted in purple are present in both products.
Learn more about what what Com. / Irr. ratings are
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. Talk about multi-purpose! If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 1.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 1.
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 GlycerinCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 3.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 2.
Pentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.
The hydrophilic trait of Pentylene Glycol makes it a humectant. As a humectant, Pentylene Glycol helps draw moisture from the air to your skin. This can help keep your skin hydrated.
This property also makes Pentylene Glycol a great texture enhancer. It can help thicken or emulsify a product. Emulsifiers help stabilize a product. It does this by preventing certain ingredients from separating.
Pentylene Glycol also acts as a mild preservative and helps to keep a product microbe-free.
Some people may experience mild eye and skin irritation from Pentylene Glycol. We always recommend speaking with a professional about using this ingredient in your routine.
Pentylene Glycol has a low molecular weight and is part of the 1,2-glycol family.
Learn more about Pentylene GlycolCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 4.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 38.
Acetyl Hexapeptide-8 is a peptide. A common name for this peptide is Argireline.
Argireline has a similar function to botox. It prevents muscle movement and contractions. By preventing muscles from moving, Argireline also prohibits the formation of fine lines and wrinkles. However, research is lacking in proving this ingredient to be as effective as botox.
Argireline tells our body to create more collagen. Collagen is a protein that makes connective tissue. Boosting collagen production leads to a healthier skin barrier. Having a healthy skin barrier means having firm and hydrated skin.
Read more about other common types of peptides here:
Learn more about Acetyl Hexapeptide-8COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 7.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 4.
Dipeptide Diaminobutyroyl Benzylamide Diacetate is a peptide.
COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 10.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 9.
Allantoin plays a role in soothing and moisturizing the skin. Because of this, it is often added to products with strong active ingredients.
Some studies have shown this ingredient can promote wound healing with higher concentrations.
Allantoin is derived from the comfrey plant but produced synthetically for cosmetic products to ensure purity.
Learn more about AllantoinCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 13.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 13.
Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.
Like hyaluronic acid, it is great at holding water and acts as a humectant. This makes it a great skin hydrating ingredient.
Sodium Hyaluronate is naturally occurring in our bodies and is mostly found in eye fluid and joints.
These are some other common types of Hyaluronic Acid:
Learn more about Sodium HyaluronateCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 14.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 12.
Serine is an amino acid naturally found in our body. Our bodies use amino acids to create protein.
Amino-acids help give keep our skin hydrated. They play an important role in the skin barrier, which keeps the skin plump and firm.
Serine is a non-essential amino acid, meaning we don't need to obtain it from eating foods.
Learn more about SerineCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 16.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 16.
Alanine is an amino acid and is already found in the human body.
Alanine has antioxidant properties and can help with anti-aging.
Alanine is used by fibrous proteins such as collagen, elastin, and keratin. These three help make a strong skin barrier. Having a healthy skin barrier leads to more plump and youthful skin.
Learn more about AlanineCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 17.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 15.
Glycine is an amino acid that helps build proteins. It is already present in our skin as our bodies produce them naturally.
Glycine helps keep skin hydrated and reduce signs of aging. Amino acids help transport moisture throughout our skin; glycine already plays a role in helping keep our skin moisturized.
As collagen is made up of glycine and other amino acids, it is believed Glycine may help our skin produce more collagen. Collagen helps keep skin plump and firm.
Learn more about GlycineCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 18.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 14.
Threonine is an amino-acid. It helps hydrate the skin and has antioxidant benefits.
Threonine is vital for creating collagen and elastin. Collagen and elastin support youthful and firm skin. Our bodies decrease collagen production naturally with age.
Humans are not able to create threonine and must get it through eating foods such as fish, lentils, poultry, sesame seeds, and more.
Learn more about ThreonineCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 19.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 20.
Arginine is an amino acid that is important for human development. Your body uses is it to produce hair keratin and skin collagen.
As a cosmetic ingredient, Arginine has antioxidant properties and can also help repair damaged skin. This ingredient is derived either synthetically or from animals.
Arginine isn't fungal acne safe when used in the presence of other lipids (fats, fatty acids, oils, esters, etc). Oils and fats occur naturally within the skin, so take caution when using Arginine if you're prone to fungal acne.
Learn more about ArginineCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 20.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 23.
Proline is an amino-acid. It helps moisturize the skin and plays an important role in creating proteins.
Proline is one of the building blocks for producing collagen. As we age, our bodies produce less collagen. Collagen helps the skin look plump and firm.
In medicine, proline is used as an osmoprotectant. This means it helps prevent oxidative degradation in other drugs.
Our bodies are able to produce proline naturally, but certain conditions may inhibit this production. In that case, proline can be obtained from eating egg whites, soy protein, dairy products, asparagus, mushrooms, and seaweed.
Learn more about ProlineCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 21.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 19.
Sodium PCA is the sodium salt of pyroglutamic acid and is naturally occurring on human skin.
The PCA stands for pyrrolidone carboxylic acid, a natural amino acid derivative.
Sodium PCA is a has 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 PCACOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 23.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 30.
Sodium Lactate is the sodium salt of lactic acid, an AHA. It is a humectant and used to adjust the pH of a product.
Sodium Lactate 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.
It also influences our skin's natural acid mantle and pH, which protects our skin from harmful bacteria.
Our NMF is formed from amino acids, lactic acid, sugars, minerals, peptides, and electrolytes. As we age, our NMF naturally depletes. Other sources of NMF depletion include harsh and drying ingredients such as denatured alcohol. Sodium lactate can help replenish our NMF, leading to more hydrated and plump skin.
High percentages of Sodium Lactate can have an exfoliating effect.
Sodium Lactate is produced from fermented sugar.
Learn more about Sodium LactateCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 24.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 32.
PCA is derived from amino acids and is naturally found in our skin's barrier.
As a humectant, PCA helps draw and hold moisture to the skin. Studies show it is effective at helping the skin stay hydrated long-term.
COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 25.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 31.
Butylene 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.
Overall, Butylene Glycol is a safe and well-rounded ingredient. It is unlikely to irritate skin, and works well with pretty much all other ingredients.
COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 34.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 37.
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.
Learn more about Xanthan GumCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 35.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 40.
Ethylhexylglycerin (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.
COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 36.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 49.
Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
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.
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 look more even.
Read more about some other popular AHA's here:
Learn more about Citric AcidCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 40.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 33.
Caprylyl Glycol is a humectant and emollient, meaning it attracts and preserves moisture.
It is a common ingredient in many products, especially those designed to hydrate skin. The primary benefits are retaining moisture, skin softening, and promoting a healthy skin barrier.
Though Caprylyl Glycol is an alcohol derived from fatty acids, it is not the kind that can dry out skin.
This ingredient is also used as a preservative to extend the life of products. It has slight antimicrobial properties.
Learn more about Caprylyl GlycolCOSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 41.
The Ordinary Multi-Peptide + HA Serum ("Buffet") contains this as ingredient number 48.
Here's what our community thinks of the ingredients in these two products.
COSRX The 6 Peptide Skin Booster Serum 44 ingredients
The Ordinary Multi-Peptide + HA Serum ("Buffet") 51 ingredients
Usage
Here's some more info on how this product is used by our community.
When to use
COSRX The 6 Peptide Skin Booster Serum 44 ingredients
The Ordinary Multi-Peptide + HA Serum ("Buffet") 51 ingredients
Reviews
Here's what our community thinks
The Ordinary Multi-Peptide + HA Serum ("Buffet") 51 ingredients
Lakooo
Watery but good
Although I prefer creamy serums over watery or oily ones, this one is still pretty pleasant, and I like how it hydrates as well as...
Watery but good
Although I prefer creamy serums over watery or oily ones, this one is still pretty pleasant, and I like how it hydrates as well as giving me the peptide boost I need.
sioloisiol
I started to add this serum to my routine when I turned 29 and wanted to incorporate peptides to my skincare game. I have an oily skin and lives in...
I started to add this serum to my routine when I turned 29 and wanted to incorporate peptides to my skincare game. I have an oily skin and lives in the tropics. I kept trying to use it but saw no benefits after almost 6 months. It just makes my skin dewy and greasy.
Alternatives
Our Dupe Finder has found 50 potential alternatives that have similar ingredients to COSRX The 6 Peptide Skin Booster Serum.
See 50 alternativesOur Dupe Finder has found 50 potential alternatives that have similar ingredients to The Ordinary Multi-Peptide + HA Serum ("Buffet").
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