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Product Comparison

Last updated on February 29, 2024. Published on April 03, 2024

Overview

What they are

These products are both reef safe . They have a total of 6 ingredients in common

Cool Features

They both contain AHA

Suited For

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

Free From

They both do not contain any harsh alcohols, common allergens, fragrances, oils, parabens, silicones 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.

Exfoliator American Brand United States
Facial Treatment American Brand United States

Exfoliator

Exfoliators are used to exfoliate the skin, or remove dead skin cells from the skin. Exfoliators may be chemical or physical.

Facial Treatment

Facial treatments are specially designed to treat a skin concern. Acne treatments and anti-aging products are common examples of facial treatments.

Price

Shop

Buy Skin Perfecting 6% Mandelic Acid + 2% Lactic Acid Liquid Exfoliant

Starts at $37.00
Shop

Buy Clearly Corrective Daily Re-Texturizing Triple Acid Peel

Starts at $50.00

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 (2)

Benefits

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

Concerns

Irritating (2)
Rosacea (2)
Eczema

Notable Ingredients

AHA (2)
BHA
PHA

Benefits

Hydrating
Good For Oily Skin (2)
Redness Reducing
Reduces Irritation (2)
Skin Texture (3)
Reduces Large Pores (3)
Anti-Aging (3)
Dark Spots (2)
Scar Healing (4)
Acne Fighting
Brightening (4)

Concerns

Drying
Irritating (3)
Rosacea (3)
Eczema (2)
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Ingredients Side-by-side

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

Learn more about what what Com. / Irr. ratings are

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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

Paula's Choice Skin Perfecting 6% Mandelic Acid + 2% Lactic Acid Liquid Exfoliant contains this as ingredient number 1.

Kiehl's Clearly Corrective Daily Re-Texturizing Triple Acid Peel contains this as ingredient number 1.

2
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 — 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

Paula's Choice Skin Perfecting 6% Mandelic Acid + 2% Lactic Acid Liquid Exfoliant contains this as ingredient number 4.

Kiehl's Clearly Corrective Daily Re-Texturizing Triple Acid Peel contains this as ingredient number 8.

3
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

Paula's Choice Skin Perfecting 6% Mandelic Acid + 2% Lactic Acid Liquid Exfoliant contains this as ingredient number 5.

Kiehl's Clearly Corrective Daily Re-Texturizing Triple Acid Peel contains this as ingredient number 9.

4
What it does: Masking, Skin Conditioning
Community Rating: Mixed

Arginine is an amino acid that is important for human development. Your body uses is it to produce hair keratin and skin collagen.

As a cosmetic ingredient, Arginine has antioxidant properties and can also help repair damaged skin. This ingredient is derived either synthetically or from animals.

Arginine isn't fungal acne safe when used in the presence of other lipids (fats, fatty acids, oils, esters, etc). Oils and fats occur naturally within the skin, so take caution when using Arginine if you're prone to fungal acne.

Learn more about Arginine

Paula's Choice Skin Perfecting 6% Mandelic Acid + 2% Lactic Acid Liquid Exfoliant contains this as ingredient number 13.

Kiehl's Clearly Corrective Daily Re-Texturizing Triple Acid Peel contains this as ingredient number 20.

5
What it does: Skin Conditioning, Solvent
Community Rating: Mixed

Pentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.

The hydrophilic trait of Pentylene Glycol makes it a humectant. As a humectant, Pentylene Glycol helps draw moisture from the air to your skin. This can help keep your skin hydrated.

This property also makes Pentylene Glycol a great texture enhancer. It can help thicken or emulsify a product. Emulsifiers help stabilize a product. It does this by preventing certain ingredients from separating.

Pentylene Glycol also acts as a mild preservative and helps to keep a product microbe-free.

Some people may experience mild eye and skin irritation from Pentylene Glycol. We always recommend speaking with a professional about using this ingredient in your routine.

Pentylene Glycol has a low molecular weight and is part of the 1,2-glycol family.

Learn more about Pentylene Glycol

Paula's Choice Skin Perfecting 6% Mandelic Acid + 2% Lactic Acid Liquid Exfoliant contains this as ingredient number 17.

Kiehl's Clearly Corrective Daily Re-Texturizing Triple Acid Peel contains this as ingredient number 2.

6
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

Paula's Choice Skin Perfecting 6% Mandelic Acid + 2% Lactic Acid Liquid Exfoliant contains this as ingredient number 19.

Kiehl's Clearly Corrective Daily Re-Texturizing Triple Acid Peel contains this as ingredient number 18.

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

39% are loved or liked
30% have mixed ratings
13% are disliked or very disliked
17% have no rating yet
57% are loved or liked
17% have mixed ratings
17% are disliked or very disliked
9% have no rating yet

Usage

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

When to use

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Alternatives

Our Dupe Finder has found 8 potential alternatives that have similar ingredients to Paula's Choice Skin Perfecting 6% Mandelic Acid + 2% Lactic Acid Liquid Exfoliant.

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Our Dupe Finder has found 50 potential alternatives that have similar ingredients to Kiehl's Clearly Corrective Daily Re-Texturizing Triple Acid Peel.

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