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Product Comparison

Here's our complete breakdown comparing the ingredients, attributes, and more of Monroe Skincare Glycolic Serum 7% versus Peter Thomas Roth FIRMx Collagen Serum .

Published on January 10, 2021

Overview

What they are

These products are both reef safe serums. They have a total of 10 ingredients in common

Cool Features

They both contain AHA and hyaluronic acid

Suited For

They're both likely to be good for anti aging, dry skin, brightening skin, reducing pores, scar healing and better texture

Free From

They both do not contain any harsh alcohols, 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.

Serum British Brand United Kingdom
Serum American Brand United States

Serum

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

Serum

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

Price

Shop

Buy Glycolic Serum 7%

Shop

Buy FIRMx Collagen Serum

Starts at $39.50

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
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

Notable Ingredients

AHA
Vitamin E
Hyaluronic Acid

Benefits

Hydrating (2)
Good For Oily Skin (3)
Redness Reducing
Reduces Irritation
Skin Texture
Reduces Large Pores
Anti-Aging (2)
Dark Spots
Scar Healing (2)
Brightening (3)

Concerns

Irritating (2)
Rosacea
Eczema

Notable Ingredients

AHA
Hyaluronic Acid
Peptides (3)

Benefits

Hydrating (2)
Skin Texture
Reduces Large Pores
Anti-Aging (4)
Scar Healing
Brightening (2)

Concerns

May Worsen Oily Skin
Irritating
Rosacea
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Ingredients Compared

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

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.

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

Monroe Skincare Glycolic Serum 7% contains this as ingredient number 1.

Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 2.

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

Monroe Skincare Glycolic Serum 7% contains this as ingredient number 5.

Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 6.

3
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

Monroe Skincare Glycolic Serum 7% contains this as ingredient number 7.

Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 23.

4
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

Monroe Skincare Glycolic Serum 7% contains this as ingredient number 11.

Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 15.

5
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

Monroe Skincare Glycolic Serum 7% contains this as ingredient number 13.

Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 18.

6
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.

Monroe Skincare Glycolic Serum 7% contains this as ingredient number 14.

Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 38.

7
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

Monroe Skincare Glycolic Serum 7% contains this as ingredient number 16.

Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 37.

8
What it does: Buffering
Community Rating: Mixed

Sodium Hydroxide is also known as lye or caustic soda. It is used to adjust the pH of products; many ingredients require a specific pH to be effective.

In small amounts, sodium hydroxide is considered safe to use. However, large amounts may cause chemical burns due to its high alkaline.

Your skin has a natural pH and acid mantle. This acid mantle helps prevent harmful bacteria from breaking through. The acid mantle also helps keep your skin hydrated.

"Alkaline" refers to a high pH level. A low pH level would be considered acidic.

Learn more about Sodium Hydroxide

Monroe Skincare Glycolic Serum 7% contains this as ingredient number 17.

Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 25.

9
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

Monroe Skincare Glycolic Serum 7% contains this as ingredient number 18.

Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 33.

10
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

Monroe Skincare Glycolic Serum 7% contains this as ingredient number 19.

Peter Thomas Roth FIRMx Collagen Serum contains this as ingredient number 32.

Here's what our community thinks of the ingredients in these two products.

38% are loved or liked
10% have mixed ratings
43% are disliked or very disliked
10% have no rating yet
38% are loved or liked
21% have mixed ratings
28% are disliked or very disliked
13% have no rating yet

Usage

Here's some more info on how this product is used by our community.

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Alternatives

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