Medik8 Liquid Peptides Versus Peach & Lily Copper Peptide Pro Firming Serum
Updated on September 16, 2023
Overview
What they are
These products are both cruelty-free and reef safe serums. They have a total of 12 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, sensitive skin, reducing pores, scar healing, dark spots and better texture
Free From
They both do not contain any harsh alcohols, common allergens, oils, parabens, silicones or sulfates
What's Inside
They both contain fragrances
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
Medik8 Liquid Peptides 33 ingredients
Peach & Lily Copper Peptide Pro Firming Serum 63 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
Medik8 Liquid Peptides 33 ingredients
Peach & Lily Copper Peptide Pro Firming Serum 63 ingredients
Key Ingredients
Benefits
Concerns
Benefits
Ingredients Side-by-side
Water
Skin ConditioningGlycerin
Humectant
Butylene Glycol
Humectant
Inulin
Skin ConditioningSodium Hyaluronate
Humectant
Panthenol
Skin Conditioning
Alpha-Glucan Oligosaccharide
CleansingCarnosine
Skin Conditioning
Carbomer
Emulsion StabilisingPolysorbate 20
Emulsifying
Caprylyl Glycol
EmollientPhenoxyethanol
Preservative
Hydroxypropyl Cyclodextrin
MaskingDunaliella Salina Extract
Skin ConditioningEthylhexylglycerin
Skin ConditioningCitric Acid
Buffering
Palmitoyl Tripeptide-5
Skin Conditioning
Sodium Benzoate
Masking
Acetyl Hexapeptide-8
Humectant
Tetrapeptide-21
Skin Conditioning
Pentapeptide-18
Skin Conditioning
Palmitoyl Tripeptide-1
Skin Conditioning
Pantolactone
Humectant
Palmitoyl Tripeptide-38
Skin Conditioning
Palmitoyl Tetrapeptide-7
Skin Conditioning
Glyceryl Caprylate
EmollientLactic Acid/Glycolic Acid Copolymer
Skin ConditioningPolyvinyl Alcohol
Phenylpropanol
Masking
Copper Palmitoyl Heptapeptide-14
Skin Conditioning
Heptapeptide-15 Palmitate
Skin Conditioning
Potassium Sorbate
Preservative
Xanthan Gum
EmulsifyingWater, Glycerin, Butylene Glycol, Inulin, Sodium Hyaluronate, Panthenol, Alpha-Glucan Oligosaccharide, Carnosine, Carbomer, Polysorbate 20, Caprylyl Glycol, Phenoxyethanol, Hydroxypropyl Cyclodextrin, Dunaliella Salina Extract, Ethylhexylglycerin, Citric Acid, Palmitoyl Tripeptide-5, Sodium Benzoate, Acetyl Hexapeptide-8, Tetrapeptide-21, Pentapeptide-18, Palmitoyl Tripeptide-1, Pantolactone, Palmitoyl Tripeptide-38, Palmitoyl Tetrapeptide-7, Glyceryl Caprylate, Lactic Acid/Glycolic Acid Copolymer, Polyvinyl Alcohol, Phenylpropanol, Copper Palmitoyl Heptapeptide-14, Heptapeptide-15 Palmitate, Potassium Sorbate, Xanthan Gum
Water
Skin ConditioningDipropylene Glycol
MaskingGlycerin
Humectant
1,2-Hexanediol
Skin Conditioning
Betaine
Humectant
Copper Tripeptide-1
Skin Conditioning
Acetyl Hexapeptide-8
Humectant
Palmitoyl Tripeptide-1
Skin Conditioning
Tetrapeptide-21
Skin Conditioning
Tetrapeptide-30
Skin Conditioning
Heptasodium Hexacarboxymethyl Dipeptide-12
Skin Conditioning
Acetyl Tetrapeptide-5
Humectant
Palmitoyl Tripeptide-38
Skin Conditioning
Palmitoyl Pentapeptide-4
Skin Conditioning
Dipeptide-2
Skin Conditioning
Tripeptide-1
Skin Conditioning
Hexapeptide-9
Skin Conditioning
Nonapeptide-1
Skin Conditioning
Collagen Extract
Skin Conditioning
Serine
Masking
Methionine
Skin ConditioningCysteine
Antioxidant
Arginine
Masking
Acmella Oleracea Extract
Skin ProtectingAlpha-Glucan Oligosaccharide
CleansingSodium PCA
Humectant
Ulmus Davidiana Root Extract
Skin Conditioning
Cichorium Intybus Root Extract
MaskingHelianthus Tuberosus Root Extract
Skin ConditioningTremella Fuciformis Extract
Humectant
Fomes Officinalis Extract
Skin ProtectingLentinus Edodes Extract
Skin ConditioningPyrus Malus Fruit Extract
Skin Conditioning
Lens Esculenta Fruit Extract
Skin ConditioningCitrullus Lanatus Fruit Extract
Skin Conditioning
Sodium Acetylated Hyaluronate
Humectant
Hydrolyzed Hyaluronic Acid
Humectant
Hyaluronic Acid
Humectant
Sodium Hyaluronate
Humectant
Sodium Hyaluronate Crosspolymer
Humectant
Potassium Hyaluronate
Skin ConditioningSqualane
Emollient
Ficus Carica Fruit Extract
Humectant
Cynanchum Atratum Extract
Skin ConditioningHydroxypropyltrimonium Hyaluronate
Ocimum Sanctum Leaf Extract
Skin Conditioning
Melia Azadirachta Leaf Extract
Skin ConditioningCurcuma Longa Root Extract
Masking
Corallina Officinalis Extract
Skin Conditioning
Solanum Melongena Fruit Extract
Skin ConditioningCoccinia Indica Fruit Extract
Skin ConditioningGellan Gum
Butylene Glycol
Humectant
Adenosine
Skin Conditioning
Aloe Barbadensis Flower Extract
EmollientMelia Azadirachta Flower Extract
Skin ConditioningPolyglyceryl-10 Eicosanedioate/Tetradecanedioate
Skin ConditioningPolyquaternium-51
Skin Conditioning
Sodium Polyacryloyldimethyl Taurate
Emulsion StabilisingHydroxypropyl Cyclodextrin
MaskingEthylhexylglycerin
Skin ConditioningHydroxyethylcellulose
Emulsion StabilisingCaprylyl Glycol
EmollientWater, Dipropylene Glycol, Glycerin, 1,2-Hexanediol, Betaine, Copper Tripeptide-1, Acetyl Hexapeptide-8, Palmitoyl Tripeptide-1, Tetrapeptide-21, Tetrapeptide-30, Heptasodium Hexacarboxymethyl Dipeptide-12, Acetyl Tetrapeptide-5, Palmitoyl Tripeptide-38, Palmitoyl Pentapeptide-4, Dipeptide-2, Tripeptide-1, Hexapeptide-9, Nonapeptide-1, Collagen Extract, Serine, Methionine, Cysteine, Arginine, Acmella Oleracea Extract, Alpha-Glucan Oligosaccharide, Sodium PCA, Ulmus Davidiana Root Extract, Cichorium Intybus Root Extract, Helianthus Tuberosus Root Extract, Tremella Fuciformis Extract, Fomes Officinalis Extract, Lentinus Edodes Extract, Pyrus Malus Fruit Extract, Lens Esculenta Fruit Extract, Citrullus Lanatus Fruit Extract, Sodium Acetylated Hyaluronate, Hydrolyzed Hyaluronic Acid, Hyaluronic Acid, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Potassium Hyaluronate, Squalane, Ficus Carica Fruit Extract, Cynanchum Atratum Extract, Hydroxypropyltrimonium Hyaluronate, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Curcuma Longa Root Extract, Corallina Officinalis Extract, Solanum Melongena Fruit Extract, Coccinia Indica Fruit Extract, Gellan Gum, Butylene Glycol, Adenosine, Aloe Barbadensis Flower Extract, Melia Azadirachta Flower Extract, Polyglyceryl-10 Eicosanedioate/Tetradecanedioate, Polyquaternium-51, Sodium Polyacryloyldimethyl Taurate, Hydroxypropyl Cyclodextrin, Ethylhexylglycerin, Hydroxyethylcellulose, Caprylyl Glycol
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Acetyl Hexapeptide-8, commonly known as Argireline, is a popular peptide in skincare. It’s often referred to as a “Botox-like” ingredient because it helps reduce muscle movement.
By relaxing these micro-movements, Argireline may help minimize the appearance of fine lines and wrinkles. That said, it’s not as powerful as Botox, and research on its long-term effectiveness is still limited.
Beyond smoothing, Argireline may also support collagen production. Collagen is the protein that helps keep your skin firm, bouncy, and well-hydrated by strengthening the skin barrier.
So while Argireline isn’t a miracle fix, it can be a helpful addition to a routine focused on both prevention and skin health.
Read more about other common types of peptides here:
Learn more about Acetyl Hexapeptide-8Alpha-Glucan Oligosaccharide is a prebiotic. It prevents harmful bacteria from growing on skin by keeping the skin's microbiome in balance.
Another benefit of this ingredient is its antioxidant properties. Antioxidants protect our skin from oxidative damage.
Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.
Learn more about Butylene GlycolCaprylyl 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 GlycolEthylhexylglycerin (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.
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 GlycerinWe don't have a description for Hydroxypropyl Cyclodextrin yet.
Palmitoyl Tripeptide-1 is also known as pal-GHK. It is made up of 3 amino acids and palmitic acid, a fatty acid that helps it absorb into skin more easily.
This peptide is as a signal peptide, meaning it tells the skin to produce more collagen. Collagen is the key protein that helps form the skin's structure and keep it plump, firm, and hydrated.
By boosting collagen production, this ingredient supports a stronger skin barrier and helps reduce the appearance of wrinkles.
You'll most likely see this ingredient paired with Palmitoyl Tetrapeptide-7 in the well-known Matrixyl 3000 complex. While results from in-house testing should be viewed cautiously, this peptide duo is among the most studied and widely used in modern skincare.
Due to its palmitic acid base, this ingredient may not be safe for Malassezia folliculitis.
Read more about other common types of peptides here:
Learn more about Palmitoyl Tripeptide-1This synthetic, signal peptide has unique skin conditioning properties in that is a matrikine-mimetic compound.
First of all, Palmitoyl Tripeptide-38 is a signal peptide; signal peptides tell the body to create more collagen.
What is a matrikine-mimetic compound?
This peptide has the ability to mimic matrikines in skin. Our skin created matrikines by breaking down matrix proteins into peptides.
Matrikines play a role in:
Though further research is needed, this ingredient seems pretty promising. In one study, women over the age of 40 with visible photoaging used a vitamin C serum with this ingredient for 56 days (15% ascorbid acid, 5 ppm palmitoyl tripeptide‐38). The results found improvement in skin roughness and skin tone.
Learn more about Palmitoyl Tripeptide-38Sodium 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 HyaluronateTetrapeptide-21 is a signal peptide. It helps boost collagen, hyaluronic acid, and fibronectin.
Fibronectin is a protein found in our skin's extracellular matrix that plays a role in cell adhesion, tissue repair, and wound healing.
Tetrapeptide-21 works by mimicking skin-protein breakdown signals, telling the skin to produce new structural proteins like collagen.
Preliminary studies show it works better than matrixyl and produced twice the amount of collagen in lab tests.
Learn more about Tetrapeptide-21Water. 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 WaterIngredient Ratings
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When to use
Medik8 Liquid Peptides 33 ingredients
Peach & Lily Copper Peptide Pro Firming Serum 63 ingredients
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