Here's our complete breakdown comparing the ingredients, attributes, and more of Peter Thomas Roth FIRMx Collagen Serum versus Kate Somerville KateCeuticals Firming Serum .
Published on February 02, 2023
Overview
What they are
These products are both reef safe serums. They have a total of 15 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 and scar healing
Free From
They both do not contain any harsh alcohols, parabens or sulfates
What's Inside
They both contain silicones
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.
Price
Ingredient Info
Peter Thomas Roth FIRMx Collagen Serum 39 ingredients
Kate Somerville KateCeuticals Firming Serum 46 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 😥
Not Cruelty Free
This product is not cruelty-free 😥
Alcohol Free
This product is free of harsh alcohols 🎉
Contains Silicon
Ingredients in this product that are types of silicon:
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 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
Contains EU Allergens
Ingredients in this product that are 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
Peter Thomas Roth FIRMx Collagen Serum 39 ingredients
Kate Somerville KateCeuticals Firming Serum 46 ingredients
Notable Ingredients
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Benefits
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Concerns
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This product contains 1 ingredient that may have this attribute:
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 1 ingredient that may have this attribute:
This product contains 1 ingredient that may have this attribute:
Benefits
This product contains 3 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 3 ingredients 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 1 ingredient 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.
Peter Thomas Roth FIRMx Collagen Serum 39 ingredients
Kate Somerville KateCeuticals Firming Serum 46 ingredients
Collagen • Water • Dimethicone • Butylene Glycol • Polysilicone-11 • Glycerin • Caffeine • Squalane • Soluble Collagen • Collagen Amino Acids • Hydrolyzed Collagen • Palmitoyl Dipeptide-5 Diaminobutyroyl Hydroxythreonine • Palmitoyl Tripeptide-5 • Acetyl Tetrapeptide-2 • Sodium Hyaluronate • Hydroxyproline • Sodium Citrate • Citric Acid • Acrylamide/Sodium Acryloyldimethyltaurate Copolymer • Ammonium Acryloyldimethyltaurate Crosspolymer • Hydroxystearic Acid • Magnesium Chloride • Polysorbate 20 • Polysorbate 80 • Sodium Hydroxide • Sorbitan Isostearate • Decyl Glucoside • Lauryl Glucoside • Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate • Leuconostoc/Radish Root Ferment Filtrate • Disodium EDTA • Potassium Sorbate • Sodium Benzoate • Isohexadecane • Ethylhexylglycerin • Hexylene Glycol • Caprylyl Glycol • Phenoxyethanol • CI 77015
Water • Dimethicone • Isohexadecane • Glycerin • Propanediol • Polysilicone-11 • Diisopropyl Sebacate • Polysorbate 20 • Isocetyl Stearate • Myristyl Alcohol • Dipalmitoyl Hydroxyproline • Glycine Soja Seed Extract • Adenosine • Ceramide Ng • Pisum Sativum Extract • Sodium Hyaluronate • Palmitoyl Tripeptide-5 • Tropaeolum Majus Flower/Leaf/Stem Extract • Citrus Aurantifolia Oil • Citrus Aurantium Dulcis Peel Oil • Citrus Paradisi Peel Oil • Mentha Piperita Oil • Zingiber Officinale Root Oil • Citrus Aurantium Bergamia Fruit Oil • Tocopherol • Myristyl Glucoside • Polymethylsilsesquioxane • Polyacrylate-13 • Commiphora Mukul Resin Extract • Sucrose Palmitate • Polysorbate 80 • Polyisobutene • Ammonium Polyacryloyldimethyl Taurate • Caprylic/Capric Triglyceride • Glyceryl Linoleate • Tocopheryl Acetate • Aminomethyl Propanol • Sorbitan Isostearate • Potassium Sorbate • Citric Acid • Disodium EDTA • Ethylhexylglycerin • Phenoxyethanol • Citral • Limonene • Linalool
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 WaterPeter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 2.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 1.
Dimethicone is a silicone used for making products smooth and silky. It also has the added benefit of sealing in hydration. The amount of dimethicone found in beauty products is considered safe and non-comedogenic, meaning it won't clog pores.
Dimethicone has been found increase absorption in skin, boosting the benefits of other ingredients. While there is concern for the safety of dimethicone, the levels used in skincare are safe for use.
Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 3.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 2.
We don't have a description for Polysilicone-11.
Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 5.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 6.
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 GlycerinPeter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 6.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 4.
Palmitoyl Tripeptide-5 isn't fungal acne safe and is a peptide.
Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 13.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 17.
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 HyaluronatePeter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 15.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 16.
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 AcidPeter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 18.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 40.
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 20Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 23.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 8.
Polysorbate 80 is a surfactant and emulsifier. It is used to keep ingredients together, and prevent oils and waters from separating.
It is made from polyethoxylated sorbitan and oleic acid. This ingredient can be found in cosmetics, foods, and medicine. It is water-soluble.
Polysorbate 80 may not be fungal acne safe.
Learn more about Polysorbate 80Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 24.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 31.
Sorbitan Isostearate is an emulsifer and cleaning agent. It is created from isostearic acid and sorbitol.
As an emulsifier, Sorbitan Isostearate prevents oils and water from separating.
Due to its isostearic acid base, it may not be safe for Malassezia or fungal acne.
Learn more about Sorbitan IsostearatePeter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 26.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 38.
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 EDTAPeter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 31.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 41.
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 SorbatePeter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 32.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 39.
Isohexadecane is added to enhance texture, emulsify, and to help cleanse. It is an isoparrafin. It is a component of petrolatum.
Due to its large size, Isohexadecane is not absorbed by the skin. Instead, it sits on top and acts as an emollient. Emollients help keep your skin soft and smooth by trapping moisture within.
Isohexadecane is often used in products designed to help oily skin. It is lightweight and non-greasy while helping to moisturize. When mixed with silicones, it gives a product a silky feel.
Learn more about IsohexadecanePeter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 34.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 3.
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.
Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 35.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 42.
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.
Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 38.
Kate Somerville KateCeuticals Firming Serum contains this as ingredient number 43.
Here's what our community thinks of the ingredients in these two products.
Peter Thomas Roth FIRMx Collagen Serum 39 ingredients
Kate Somerville KateCeuticals Firming Serum 46 ingredients
Usage
Here's some more info on how this product is used by our community.
When to use
Peter Thomas Roth FIRMx Collagen Serum 39 ingredients
Kate Somerville KateCeuticals Firming Serum 46 ingredients
Alternatives
Our Dupe Finder has found 32 potential alternatives that have similar ingredients to Peter Thomas Roth FIRMx Collagen Serum.
See 32 alternativesOur Dupe Finder has found 8 potential alternatives that have similar ingredients to Kate Somerville KateCeuticals Firming Serum.
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