Here's our complete breakdown comparing the ingredients, attributes, and more of Paula's Choice Peptide Booster versus Medik8 Liquid Peptides .
Published on April 12, 2022
Overview
What they are
These products are both cruelty-free and reef safe . They have a total of 10 ingredients in common
Cool Features
They both contain AHA and peptides
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, sensitive skin, scar healing and dark spots
Free From
They both do not contain any harsh alcohols, common allergens, oils, parabens or sulfates
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.
Facial Treatment
Facial treatments are specially designed to treat a skin concern. Acne treatments and anti-aging products are common examples of facial treatments.
Serum
Serums are highly concentrated with ingredients to provide skin with benefits. They should be used after cleansing and before moisturizing.
Ingredient Info
Paula's Choice Peptide Booster 56 ingredients
Medik8 Liquid Peptides 33 ingredients
Alcohol Free
This product is free of harsh alcohols 🎉
Contains Silicon
Ingredients in this product that are types of silicon:
Fragrance Free
This product is free of fragrances 🎉
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Oil Free
This product is free of oils 🎉
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 🎉
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 🎉
Oil Free
This product is free of oils 🎉
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 🎉
At a glance
Click on any of the items below to learn more
Paula's Choice Peptide Booster 56 ingredients
Medik8 Liquid Peptides 33 ingredients
Notable Ingredients
This product contains 1 ingredient that may have this attribute:
This product contains 8 ingredients that may have this attribute:
Benefits
This product contains 3 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
Concerns
This product contains 1 ingredient that may have this attribute:
Notable Ingredients
This product contains 2 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 9 ingredients that may have this attribute:
Benefits
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
This product contains 2 ingredients that may have this attribute:
This product contains 3 ingredients that may have this attribute:
Concerns
This product contains 2 ingredients that may have this attribute:
This product contains 2 ingredients that may have this attribute:
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.
Paula's Choice Peptide Booster 56 ingredients
Medik8 Liquid Peptides 33 ingredients
Water • Glycerin • Peg-8 Dimethicone • Tripeptide-1 • Palmitoyl Tripeptide-1 • Palmitoyl Tetrapeptide-7 • Palmitoyl Hexapeptide-12 • Myristoyl Hexapeptide-16 • Myristoyl Pentapeptide-17 • Hexanoyl Dipeptide-3 Norleucine Acetate • Azelaoyl Bis-Dipeptide-10 • Glycoproteins • Phospholipids • Adenosine • Dipotassium Glycyrrhizate • Arginine • Valine • Glycine • Alanine • Glutamic Acid • Serine • Threonine • Yeast Extract • Isoleucine • Proline • Histidine • Phenylalanine • PCA • Phytic Acid • Panax Ginseng Root Extract • Sodium PCA • Psidium Guajava Fruit Extract • Euterpe Oleracea Fruit Extract • Ahnfeltiopsis Concinna Extract • Dextran • Hydrolyzed Silk • Lecithin • Glyceryl Polymethacrylate • C12-16 Pareth-9 • Trideceth-12 • Sodium Lactate • Carbomer • Aspartic Acid • Polysorbate 20 • Butylene Glycol • Caprylyl Glycol • Peg-8 • C11-15 Pareth-7 • Guar Hydroxypropyltrimonium Chloride • Phytosteryl/Octyldodecyl Lauroyl Glutamate • Ectoin • Citrate Buffer • Trimethylsiloxyamodimethicone • Phenoxyethanol • Sodium Hydroxide • Ethylhexylglycerin
Water • 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 • Polyvinyl Alcohol • Phenylpropanol • Copper Palmitoyl Heptapeptide-14 • Heptapeptide-15 Palmitate • Potassium Sorbate • Xanthan Gum
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 WaterPaula's Choice Peptide Booster contains this as ingredient number 1.
Medik8 Liquid Peptides 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 GlycerinPaula's Choice Peptide Booster contains this as ingredient number 2.
Medik8 Liquid Peptides contains this as ingredient number 2.
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-1Paula's Choice Peptide Booster contains this as ingredient number 5.
Medik8 Liquid Peptides contains this as ingredient number 22.
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-7Paula's Choice Peptide Booster contains this as ingredient number 6.
Medik8 Liquid Peptides contains this as ingredient number 25.
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.
Paula's Choice Peptide Booster contains this as ingredient number 42.
Medik8 Liquid Peptides contains this as ingredient number 9.
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 20Paula's Choice Peptide Booster contains this as ingredient number 44.
Medik8 Liquid Peptides contains this as ingredient number 10.
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.
Paula's Choice Peptide Booster contains this as ingredient number 45.
Medik8 Liquid Peptides contains this as ingredient number 3.
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 GlycolPaula's Choice Peptide Booster contains this as ingredient number 46.
Medik8 Liquid Peptides contains this as ingredient number 11.
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.
Paula's Choice Peptide Booster contains this as ingredient number 54.
Medik8 Liquid Peptides contains this as ingredient number 12.
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.
Paula's Choice Peptide Booster contains this as ingredient number 56.
Medik8 Liquid Peptides contains this as ingredient number 15.
Here's what our community thinks of the ingredients in these two products.
Paula's Choice Peptide Booster 56 ingredients
Medik8 Liquid Peptides 33 ingredients
Usage
Here's some more info on how this product is used by our community.
When to use
Paula's Choice Peptide Booster 56 ingredients
Medik8 Liquid Peptides 33 ingredients
Reviews
Here's what our community thinks
Paula's Choice Peptide Booster 56 ingredients
Medik8 Liquid Peptides 33 ingredients
Julietteanne6464
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
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