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Medik8 Liquid Peptides Ingredients Explained

5.0   from 3 ratings
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Published on January 31, 2022 Submitted by EmilieNetteland_868

Overview

What it is

Serum with 33 ingredients that contains AHA, hyaluronic acid and peptides

Cool Features

It is cruelty-free and reef safe

Suited For

It has ingredients that are good for anti aging, dry skin, brightening skin, sensitive skin, reducing pores, scar healing, dark spots and better texture

Free From

It doesn't contain any harsh alcohols, common allergens, oils, parabens, silicones or sulfates

Fun facts

Medik8 is from United Kingdom. This product is used in 79 routines created by our community.

We independently verify ingredients and our claims are backed by peer-reviewed research. Does this product need an update? Let us know.

You should know

Here's our breakdown of the notable ingredients, benefits, and concerns we determined from the ingredients in this product. Click any item to learn more.

Notable Ingredients

AHA (2)
Hyaluronic Acid
Peptides (9)

Benefits

Hydrating
Reduces Irritation
Skin Texture (2)
Reduces Large Pores (2)
Anti-Aging
Dark Spots
Scar Healing (2)
Brightening (3)

Concerns

Irritating (2)
Rosacea (2)
Eczema

Ingredient Info

Click any item below to learn more and view relevant ingredients.
alcohol-free
silicon-free
fragrance-free
sulfate-free
paraben-free
oil-free
fungal-acne safe
reef-safe
eu-allergen-free
vegan
cruelty-free

Ingredients Overview

Here's our quick-to-read summary of the ingredients in this product. Keep scrolling if you'd like to learn more about what each ingredient does!
Ingredient
Features
1
Skin Conditioning, Solvent
2
Humectant, Skin Conditioning, Skin Protecting, Solvent
0 / 0
Helps hydrate Dry Skin IconHelps brighten skin Icon
3
Humectant, Masking, Skin Conditioning, Solvent
1 / 0
4
Skin Conditioning
5
Humectant, Skin Conditioning
0 / 0
Hyaluronic Acid Icon
6
Skin Conditioning
0 / 0
Helps reduce irritation Icon
7
Cleansing, Skin Conditioning, Smoothing
8
Skin Conditioning
9
Emulsion Stabilising, Gel Forming
1 / 0
10
Emulsifying
0 / 0
Not safe for Fungal Acne Icon
11
Emollient, Humectant, Skin Conditioning
12
Preservative
Preservative Icon
13
Masking, Skin Conditioning
14
Skin Conditioning
15
Skin Conditioning
16
Buffering, Masking
AHA IconMay cause irritation IconGood for Skin Texture IconGood for Minimizing Pores IconGood for Scar Healing IconMay worsen Rosacea IconHelps brighten skin Icon
17
Skin Conditioning
Peptide IconNot safe for Fungal Acne Icon
18
Masking, Preservative
Preservative Icon
19
Humectant, Skin Conditioning
Peptide Icon
20
Skin Conditioning
Peptide Icon
21
Skin Conditioning
Peptide Icon
22
Skin Conditioning
Peptide IconNot safe for Fungal Acne Icon
23
Humectant, Skin Conditioning
24
Skin Conditioning
Peptide IconNot safe for Fungal Acne Icon
25
Skin Conditioning
Peptide IconNot safe for Fungal Acne Icon
26
Emollient, Emulsifying
27
Buffering, Humectant, Skin Conditioning
AHA IconMay cause irritation IconGood for Skin Texture IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconMay worsen Eczema IconMay worsen Rosacea IconHelps brighten skin Icon
28
29
Masking, Perfuming, Solvent
Fragrance Icon
30
Skin Conditioning
Peptide Icon
31
Skin Conditioning
Peptide IconNot safe for Fungal Acne Icon
32
Preservative
Preservative Icon
33
Emulsifying, Emulsion Stabilising, Gel Forming, Skin Conditioning

Ingredients Explained

This product contains 33 ingredients. Click on any ingredient to learn more about it
1
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
2
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
3
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.

4
What it does: Skin Conditioning
Community Rating: Loved

Inulin is a polysaccharide (carbohydrate) with prebiotic and antioxidant properties.

The majority of inulin is extracted from chicory, but can also be obtained from other plants such as garlic, onion, asparagus, and sugarcane.

Studies show inulin may help with controlling your skin's natural microbiota when applied topically.

The antioxidant potential of inulin varies depending on the source.

Learn more about Inulin
5
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
6
What it does: Skin Conditioning
Community Rating: Loved

Panthenol (also referred to as pro-vitamin B5) is a common ingredient that helps hydrate and soothe the skin.

lt is a humectant, meaning that it helps the skin attract and retain moisture.

Another benefit is the anti-inflammatory abilities. This means that it's great for sensitive, irritation-prone skin.

Once oxidized, panthenol converts to pantothenic acid. Panthothenic acid is found in all living cells.

Learn more about Panthenol
7
What it does: Cleansing, Skin Conditioning, Smoothing
Community Rating: Loved

Alpha-Glucan Oligosaccharide is a prebiotic. It prevents harmful bacteria from growing on skin by keeping the skin's microbiome in balance.

Alpha-Glucan Oligosaccharide also has antioxidant properties. Antioxidants help fight free-radicals. Free-radicals are molecules that may damage your skin cells.

8
What it does: Skin Conditioning
Community Rating: Loved

We don't have a description for Carnosine.

9
What it does: Emulsion Stabilising, Gel Forming
Community Rating: Disliked

Carbomer is a polymer of acrylic acid. Its main role is to create gel consistency within products.

Carbomer is commonly found in many types of cosmetics products. It is found to be safe in concentrations up to 15%. However, a high amount of carbomer can cause pilling or balling up of products. Most products contain 1% of less of carbomer.

10
What it does: Emulsifying
Community Rating: Very Disliked

Polysorbate 20 is made by combining ethoxylation of sorbitan, ethylene oxide, and lauric acid. It is a mild cleansing agent, surfactant, and emulsifier.

As a surfactant, it helps collect dirt and oils for washing. Emulsifiers prevent oils and water from separating.

Polysorbate 20 also adds scent to a product. Since it is made using sorbitol, it has a sweet scent. Sorbitol can also be found in fruits such as apples and peaches.

The lauric acid used to create Polysorbate 20 is often derived from coconuts.

Polysorbate 20 may not be fungal acne safe.

Learn more about Polysorbate 20
11
What it does: Emollient, Humectant, Skin Conditioning
Community Rating: Liked

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 Glycol
12
What it does: Preservative
Community Rating: Very Disliked

Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent germ and microbial growth. By itself, it has a scent that is similar to that of a rose.

It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.

13
What it does: Masking, Skin Conditioning

We don't have a description for Hydroxypropyl Cyclodextrin.

14
What it does: Skin Conditioning
Community Rating: Mixed

We don't have a description for Dunaliella Salina Extract.

15
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.

16
What it does: Buffering, Masking
Community Rating: Disliked

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 Acid
17
What it does: Skin Conditioning
Community Rating: Liked

Palmitoyl Tripeptide-5 isn't fungal acne safe and is a peptide.

18
What it does: Masking, Preservative
Community Rating: Disliked

Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.

Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.

Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.

Sodium Benzoate is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.

Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.

We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.

Learn more about Sodium Benzoate
19
What it does: Humectant, Skin Conditioning
Community Rating: Loved

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-8
20
What it does: Skin Conditioning
Community Rating: Loved

Tetrapeptide-21 is a peptide.

21
What it does: Skin Conditioning
Community Rating: Loved

Pentapeptide-18 is a peptide.

22
What it does: Skin Conditioning
Community Rating: Liked

Palmitoyl Tripeptide-1 is a 3-amino acid peptide. Peptides are building blocks for protein.

Palmitoyl Tripeptide-1 is a signal peptide. This means it tells our skin to create 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.

Palmitoyl Tripeptide-1 can help reduce wrinkles and make the skin look more youthful.

Read more about other common types of peptides here:

Learn more about Palmitoyl Tripeptide-1
23
What it does: Humectant, Skin Conditioning
Community Rating: Liked

Pantolactone is a synthetically created humectant.

As a humectant, Pantolactone helps draw moisture to the skin. It can help add hydration to your skin.

24
What it does: Skin Conditioning
Community Rating: Liked

Palmitoyl Tripeptide-38 isn't fungal acne safe and is a peptide.

25
What it does: Skin Conditioning
Community Rating: Loved

Palmitoyl Tetrapeptide-7 is a peptide. Peptides are building blocks for protein.

This ingredient consists of four amino acids and palmitic acid. These amino acids are arginine, proline, glutamine, and glycine.

This ingredient has many benefits. These benefits include boosting collagen production, fighting inflammation, and reversing UV damage.

By preventing our bodies from producing interleukins, Palmitoyl Tetrapeptide-7 helps fight inflammation. An interleukin is a chemical that signals to the body to produce an inflammatory response. Interleukin production is accelerated by UV radiation.

Palmitoyl Tetrapeptide-7 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 Palmitoyl Tetrapeptide-7
26
What it does: Emollient, Emulsifying
Community Rating: Mixed

Glyceryl Caprylate comes from glycerin and caprylic acid, a fatty acid from coconut.

Glyceryl Caprylate is used for its emollient and emulsifier properties.

As an emollient, it helps hydrate your skin. Emollients work by creating a barrier on your skin to trap moisture in, helping to keep your skin soft and smooth.

Glyceryl Caprylate helps keep the ingredients such as oil and water together as an emulsifier.

Learn more about Glyceryl Caprylate
27
What it does: Buffering, Humectant, Skin Conditioning
Community Rating: Loved

Lactic Acid is an AHA that is derived from fermenting lactose, a carbohydrate from milk. It removes the top layer of old and dead skin cells and helps increase cell turnover.

Benefits of Lactic Acid are that it can help to reduce large pores and reduce the effects of aging. Some potential downsides are that it can be bad for dry skin, cause irritation, worsen eczema, and worsen rosacea.

Not only does it help exfoliate the skin, it helps strengthen the skin's barrier. When applied, lactic acid helps the skin create ceramides.

Lactic acid is an over-the-counter chemical exfoliant that comes from the fermentation of lactose β€” a carbohydrate found in milk.

Legend has it that Cleopatra used to bathe in sour milk to help reduce wrinkles.

Read more about some other popular AHA's here:

Learn more about Lactic Acid
28
What it does:
Community Rating: Very Disliked

We don't have a description for Polyvinyl Alcohol.

29
What it does: Masking, Perfuming, Solvent
Community Rating: Disliked

Phenylpropanol is a fragrance.

30
What it does: Skin Conditioning
Community Rating: Liked

This peptide is the copper salt and formed by reacting palmitic acid and heptapeptide-14.

31
What it does: Skin Conditioning
Community Rating: Liked

Heptapeptide-15 Palmitate isn't fungal acne safe and is a peptide.

32
What it does: Preservative
Community Rating: Disliked

Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.

Potassium sorbate is potassium salt derived from sorbic acid. Sorbic acid is a natural antibiotic and effective against fungus.

Potassium sorbate and sorbic acid can be found in baked goods, cheeses, dried meats, dried fruit, ice cream, pickles, wine, yogurt, and more.

Potassium sorbate is often used with stronger preservatives.

Learn more about Potassium Sorbate
33
What it does: Emulsifying, Emulsion Stabilising, Gel Forming, Skin Conditioning
Community Rating: Disliked

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 Gum
Embed Ingredients

Here's what our community thinks of the 33 ingredients in this product ✨

58% are loved or liked
12% have mixed ratings
27% are disliked or very disliked
3% have no rating yet

When to use

We've created a guide with info on when you should use Medik8 Liquid Peptides. We've also included some recommended products to use it with, as well as some routine inspiration!

Read our guide on when to use Liquid Peptides ->
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The data we've presented on this page has been verified by a member of the SkinSort Team.

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Reviews

5.0 /5
from 3 ratings
Julietteanne6464's avatar

Julietteanne6464

9 months ago Β· Normal Skin
Review

It’s water based and firms my skin. My skin loves it. I also like Bare Minerals Herb Serum as it has niacinamide and my skin loves that too. Medik8...

It’s water based and firms my skin. My skin loves it. I also like Bare Minerals Herb Serum as it has niacinamide and my skin loves that too. Medik8 Crystal Retinal 3 and 6 also. Elemis pro rad cream wash and dynamic resurf and kefir mist