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

See how these products line up with your preferences

Here's our complete breakdown comparing the ingredients, attributes, and more of COSRX The 6 Peptide Skin Booster Serum versus MEDI-PEEL Red Lacto Collagen Ampoule .

Last updated on December 09, 2023. Published on March 13, 2024

Overview

What they are

These products are both 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 need an update? Let us know.

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COSRX The 6 Peptide Skin Booster Serum

MEDI-PEEL Red Lacto Collagen Ampoule

Serum South Korean Brand

Ampoule South Korean Brand

Serum

Serums are highly concentrated with ingredients to provide skin with benefits. They should be used after cleansing and before moisturizing.

Ampoule

Ampoules are created to target one area of concern. They are usually highly concentrated with active or beneficial ingredients.

Price

Ingredient Info

Click any item below to learn more and view relevant ingredients.

COSRX The 6 Peptide Skin Booster Serum 44 ingredients

MEDI-PEEL Red Lacto Collagen Ampoule 57 ingredients

alcohol-free

silicon-free

fragrance-free

sulfate-free

paraben-free

oil-free

fungal-acne safe

reef-safe

eu-allergen-free

vegan

cruelty-free

alcohol-free

silicon-free

fragrance-free

sulfate-free

paraben-free

oil-free

fungal-acne safe

reef-safe

eu-allergen-free

vegan

cruelty-free

At a glance

Click on any of the items below to learn more

COSRX The 6 Peptide Skin Booster Serum 44 ingredients

MEDI-PEEL Red Lacto Collagen Ampoule 57 ingredients

Notable Ingredients

Vitamin E

Niacinamide

Hyaluronic Acid

Peptides (6)

Benefits

Hydrating (4)

Good For Oily Skin

Redness Reducing (3)

Reduces Irritation (2)

Reduces Large Pores

Anti-Aging (3)

Dark Spots

Scar Healing (3)

Acne Fighting

Brightening (3)

Concerns

Irritating

Notable Ingredients

Niacinamide

Hyaluronic Acid (3)

Peptides (2)

Benefits

Hydrating

Good For Oily Skin

Redness Reducing (2)

Reduces Irritation

Reduces Large Pores (2)

Anti-Aging (3)

Dark Spots

Scar Healing

Acne Fighting (2)

Brightening (2)

Concerns

May Worsen Oily Skin

Acne Trigger

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Ingredients Compared

Ingredients that are highlighted in purple are present in both products.

COSRX The 6 Peptide Skin Booster Serum 44 ingredients

MEDI-PEEL Red Lacto Collagen Ampoule 57 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 • Diglycerin • Butylene Glycol • Cyclohexasiloxane • Isopropyl Palmitate • 1,2-Hexanediol • Niacinamide • Lactobacillus Ferment • Polyquaternium-51 • Polyglyceryl-10 Laurate • Arginine • Acrylates/C10-30 Alkyl Acrylate Crosspolymer • Carbomer • Bifida Ferment Filtrate • Lactococcus Ferment • Prunus Amygdalus Dulcis Oil • Hydrolyzed Collagen • Diospyros Kaki Leaf Extract • Vitis Vinifera Fruit Extract • Coffea Arabica Seed Extract • Carthamus Tinctorius Flower Extract • Polygonum Cuspidatum Root Extract • Adenosine • Camellia Sinensis Leaf Extract • Castanea Crenata Shell Extract • Zanthoxylum Piperitum Fruit Extract • Mentha Arvensis Leaf Oil • Disodium EDTA • Barosma Betulina Leaf Extract • Sodium Hyaluronate • Rosa Damascena Flower Water • Pueraria Lobata Root Extract • Ulmus Davidiana Root Extract • Pinus Palustris Leaf Extract • Oenothera Biennis Flower Extract • Ethylhexylglycerin • Glycine • Serine • Glutamic Acid • Aspartic Acid • Leucine • Hydrolyzed Hyaluronic Acid • Alanine • Lysine • Tyrosine • Phenylalanine • Threonine • Valine • Proline • Isoleucine • Dipeptide Diaminobutyroyl Benzylamide Diacetate • Histidine • Methionine • Cysteine • Palmitoyl Tripeptide-5 • Sodium Acetylated Hyaluronate

Ingredients Side-by-side

Ingredients that are highlighted in purple are present in both products.

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Ingredients Explained

These ingredients are found in both products.

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

Water

What it does: Skin Conditioning, Solvent

Community Rating: Loved

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 Water

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 1.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 1.

Glycerin

What it does: Humectant, Skin Conditioning, Skin Protecting, Solvent

Community Rating: Loved

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

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 3.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 2.

1,2-Hexanediol

What it does: Skin Conditioning, Solvent

Community Rating: Mixed

1,2-Hexanediol is a multi-tasker ingredient. It acts as a preservative to increase shelf-life and can aid other preservatives in preventing microbe growth. 1,2-Hexanediol also helps the skin retain moisture as a humectant.

In products that are water-based, this ingredient can help stabilize perfumes and fragrances. It can also help make the texture of products softer and more smooth.

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 5.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 7.

Niacinamide

What it does: Smoothing

Community Rating: Loved

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

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 6.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 8.

Dipeptide Diaminobutyroyl Benzylamide Diacetate

What it does: Skin Conditioning

Community Rating: Loved

Dipeptide Diaminobutyroyl Benzylamide Diacetate is a peptide.

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 10.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 52.

Sodium Hyaluronate

What it does: Humectant, Skin Conditioning

Community Rating: Loved

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

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 14.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 31.

Serine

What it does: Masking, Skin Conditioning

Community Rating: Loved

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

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 16.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 39.

Alanine

What it does: Masking, Skin Conditioning

Community Rating: Loved

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 Alanine

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 17.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 44.

Glycine

What it does: Buffering, Skin Conditioning

Community Rating: Loved

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 Glycine

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 18.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 38.

Threonine

What it does:

Community Rating: Loved

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 Threonine

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 19.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 48.

Arginine

What it does: Masking, Skin Conditioning

Community Rating: Mixed

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

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 20.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 12.

Proline

What it does: Skin Conditioning

Community Rating: Loved

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 Proline

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 21.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 50.

Glutamic Acid

What it does: Humectant

Community Rating: Loved

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

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 26.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 40.

Butylene Glycol

What it does: Humectant, Masking, Skin Conditioning, Solvent

Community Rating: Mixed

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.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 4.

Ethylhexylglycerin

What it does: Skin Conditioning

Community Rating: Mixed

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.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 37.

Adenosine

What it does: Skin Conditioning

Community Rating: Loved

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

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 37.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 24.

Polyquaternium-51

What it does: Skin Conditioning

Community Rating: Liked

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.

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 38.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 10.

Disodium EDTA

What it does:

Community Rating: Disliked

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

COSRX The 6 Peptide Skin Booster Serum contains this as ingredient number 39.

MEDI-PEEL Red Lacto Collagen Ampoule contains this as ingredient number 29.

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