Versus

COSRX The 6 Peptide Skin Booster Serum Versus MEDI-PEEL Red Lacto Collagen Ampoule

Serum
Ampoule
Korean Brand South Korea
Korean Brand South Korea

Updated on August 29, 2024

Overview

What they are

These products are both cruelty-free and reef safe . They have a total of 18 ingredients in common

Cool Features

They both contain hyaluronic acid, niacinamide and peptides

Suited For

They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing and dark spots

Free From

They both do not contain any common allergens, parabens or sulfates

What's Inside

They both contain fragrances and oils

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

Click any item below to learn more and see relevant ingredients

About this product

About this product

At a glance

Click on any of the items below to learn more

Key Ingredients

Benefits

Concerns

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products
The 6 Peptide Skin Booster Serum
Red Lacto Collagen Ampoule

Water

Skin Conditioning

Glycerin

Humectant
0 / 0 Helps hydrate Dry Skin IconHelps brighten skin Icon

Diglycerin

Humectant

Butylene Glycol

Humectant
1 / 0 Helps hydrate Dry Skin Icon

Cyclohexasiloxane

Emollient
Silicon Icon

Isopropyl Palmitate

Emollient
3-4 / 1 May worsen Oily Skin IconBad for Acne Prone Skin IconNot safe for Fungal Acne Icon

1,2-Hexanediol

Skin Conditioning

Niacinamide

Smoothing
Niacinamide IconGood for Oily Skin IconHelps reduce Skin Redness IconHelps reduce irritation IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps fight Acne IconHelps brighten skin Icon

Lactobacillus Ferment

Skin Conditioning

Polyquaternium-51

Skin Conditioning

Polyglyceryl-10 Laurate

Skin Conditioning
Not safe for Fungal Acne Icon

Arginine

Masking
Good for Scar Healing IconNot safe for Fungal Acne Icon

Acrylates/C10-30 Alkyl Acrylate Crosspolymer

Emulsion Stabilising

Carbomer

Emulsion Stabilising
1 / 0

Bifida Ferment Filtrate

Skin Conditioning

Lactococcus Ferment

Skin Conditioning

Prunus Amygdalus Dulcis Oil

Skin Conditioning
3 / 0 Oil IconBad for Acne Prone Skin IconNot safe for Fungal Acne Icon

Hydrolyzed Collagen

Emollient
Helps hydrate Dry Skin IconHelps with Anti-Aging Icon

Diospyros Kaki Leaf Extract

Skin Protecting

Vitis Vinifera Fruit Extract

Skin Conditioning

Coffea Arabica Seed Extract

Masking

Carthamus Tinctorius Flower Extract

Skin Conditioning

Polygonum Cuspidatum Root Extract

Antioxidant
Antioxidant Icon

Adenosine

Skin Conditioning
Good for Minimizing Pores IconGood for Scar Healing Icon

Camellia Sinensis Leaf Extract

Antimicrobial
Antioxidant IconHelps reduce Skin Redness IconHelps reduce irritation IconGood for Minimizing Pores IconHelps with Anti-Aging Icon

Castanea Crenata Shell Extract

Skin Conditioning

Zanthoxylum Piperitum Fruit Extract

Skin Conditioning

Mentha Arvensis Leaf Oil

Masking
Oil Icon

Disodium EDTA

Barosma Betulina Leaf Extract

Perfuming
Fragrance Icon

Sodium Hyaluronate

Humectant
0 / 0 Hyaluronic Acid Icon

Rosa Damascena Flower Water

Masking

Pueraria Lobata Root Extract

Humectant

Ulmus Davidiana Root Extract

Skin Conditioning

Pinus Palustris Leaf Extract

Tonic

Oenothera Biennis Flower Extract

Astringent

Ethylhexylglycerin

Skin Conditioning

Glycine

Buffering
Helps hydrate Dry Skin Icon

Serine

Masking

Glutamic Acid

Humectant

Aspartic Acid

Masking

Leucine

Skin Conditioning

Hydrolyzed Hyaluronic Acid

Humectant
Hyaluronic Acid IconHelps with Anti-Aging IconGood for Scar Healing IconHelps brighten skin Icon

Alanine

Masking

Lysine

Skin Conditioning

Tyrosine

Masking

Phenylalanine

Masking

Threonine

Valine

Masking

Proline

Skin Conditioning

Isoleucine

Skin Conditioning

Dipeptide Diaminobutyroyl Benzylamide Diacetate

Skin Conditioning
Peptide Icon

Histidine

Humectant

Methionine

Skin Conditioning

Cysteine

Antioxidant
Antioxidant Icon

Palmitoyl Tripeptide-5

Skin Conditioning
Peptide IconHelps with Anti-Aging IconNot safe for Fungal Acne Icon

Sodium Acetylated Hyaluronate

Humectant
Hyaluronic Acid Icon

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Skin Conditioning, Solvent

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 Water
Humectant, Skin Conditioning, Skin Protecting

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 Glycerin
Skin Conditioning, Solvent

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 
Smoothing

Niacinamide has emerged as an all-star ingredient due to its many benefits.

It is known to treat acne by reducing inflammation. It also helps fade dark-spots and strengthen the skin by promoting the growth of the ceramide barrier.

Other benefits include smoothing wrinkles and minimizing redness.

The cherry on top? Niacinamide can also help build keratin, a protein that keeps skin firm.

When incorporating niacinamide into your routine, look out for concentration amounts. Typically, 5% niacinamide provides benefits such as fading dark spots. However, if you have sensitive skin, it is better to begin with a smaller concentration.

Niacinamide can be mixed with other ingredients to boost benefits. For instance, it has shown to be effective when used with copper, folic acid, and zinc to treat acne.

Learn more about Niacinamide

This small molecule peptide has similar benefits to Argireline, the "botox" peptide.

According to the manufacturer, this peptide mimics snake venom to freeze muscles. This prevents muscle movement and contractions to prohibit the formation of fine lines and wrinkles.

While this seems promising, research is lacking in proving this ingredient to be as effective as botox.

Learn more about Dipeptide Diaminobutyroyl Benzylamide Diacetate
Humectant, Skin Conditioning

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 Hyaluronate
Masking, Skin Conditioning

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 Serine
Masking, Skin Conditioning

Alanine is an amino acid and is already found in the human body. Our skin uses alanine to build collagen, elastin, and keratin.

Buffering, Skin Conditioning

This ingredient is an amino acid that helps build proteins and moisturizes skin. It is already present in our skin as our bodies produce them naturally.

Glycine already plays a role in helping keep our skin moisturized as amino acids transport moisture throughout our skin.

As collagen is made up of glycine and other amino acids, it is believed glycine may help our skin produce more collagen.

Learn more about Glycine

Threonine 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.

Masking, Skin Conditioning

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 Arginine
Skin Conditioning

Proline is an amino-acid. It helps moisturize the skin and plays an important role in creating proteins.

Our skin uses proline as one of the building blocks for producing collagen.

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 Proline
Humectant

Glutamic Acid is an amino acid that is found in all living organisms. Our bodies use this to help nerve cells in the brain communicate with other cells.

In cosmetics, glutamic acid is a famous humectant. It draws water from the air to your skin, keeping your skin hydrated (like hyaluronic acid).

An in-vitro study from 2024 found glutamic acid to play a role in inhibiting inflammation and thus a potential skin-soothing ingredient.

Other studies show it to be have potential wound healing, skin barrier repair, and hair growth properties.

Glutamic acid has poor solubility in water and other solvents.

Learn more about Glutamic Acid
Humectant, Masking, Skin Conditioning

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.
  • It has mild preservative properties.

Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.

Skin Conditioning

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.

Skin Conditioning

Adenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.

Adenosine has many benefits when used. These benefits include hydrating the skin, smoothing skin, and reducing wrinkles. Once applied, adenosine increases collagen production. It also helps with improving firmness and tissue repair.

Studies have found adenosine may also help with wound healing.

In skincare products, Adenosine is usually derived from yeast.

Learn more about Adenosine
Skin Conditioning

Polyquaternium-51 is a polymer salt. It helps hydrate the skin by creating a film on top. This film traps moisture in, keeping your skin soft and hydrated.

Disodium EDTA plays a role in making products more stable by aiding other preservatives.

It is a chelating agent, meaning it neutralizes metal ions that may be found in a product.

Disodium EDTA is a salt of edetic acid and is found to be safe in cosmetic ingredients.

Learn more about Disodium EDTA

When to use

1,800 Routines
50% use in am
50% use in pm
95% use every day
When to use See routines that use it ->
3 Routines
33% use in am
67% use in pm
67% use every day

Reviews

Here's what our community thinks

COSRX The 6 Peptide Skin Booster Serum 44 ingredients

2.8 /5
from 27 ratings
No Scent (12) Light (11) Absorbs Well (10)
Sato's avatar

Katarzyna K

9 months ago
Review

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.

#broke me out
#irritating
#light
#absorbs well
skincaredude's avatar

Kevin Estevez

8 months ago
Review

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.

#broke me out
#absorbs well

MEDI-PEEL Red Lacto Collagen Ampoule 57 ingredients

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