FaceTheory BHA Exfoliating Serum S3 Versus Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel
Updated on June 26, 2025
Overview
What they are
These products are both cruelty-free exfoliators. They have a total of 7 ingredients in common
Cool Features
They both contain BHA, hyaluronic acid and Vitamin E
Suited For
They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores and scar healing
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 needs an update? Let us know.
Ingredient Info
FaceTheory BHA Exfoliating Serum S3 19 ingredients
Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel 26 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
FaceTheory BHA Exfoliating Serum S3 19 ingredients
Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel 26 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningPropanediol
Solvent
Butyloctyl Salicylate
Skin Conditioning
Carnitine
CleansingPolyglyceryl-6 Stearate
Emollient
Salicylic Acid
Masking
Glycerin
Humectant
Chamomilla Recutita Flower Extract
Masking
Camellia Sinensis Leaf Extract
Antimicrobial
Aloe Barbadensis Leaf Juice
Skin Conditioning
Polyglyceryl-4 Oleate
Emulsifying
Tocopherol
Antioxidant
Cetyl Hydroxyethylcellulose
Emulsion StabilisingGlyceryl Caprylate
EmollientSodium Anisate
AntimicrobialSodium Levulinate
Skin ConditioningPolyglyceryl-6 Behenate
Emulsion Stabilising
Xanthan Gum
EmulsifyingSodium Hyaluronate
Humectant
Water, Propanediol, Butyloctyl Salicylate, Carnitine, Polyglyceryl-6 Stearate, Salicylic Acid, Glycerin, Chamomilla Recutita Flower Extract, Camellia Sinensis Leaf Extract, Aloe Barbadensis Leaf Juice, Polyglyceryl-4 Oleate, Tocopherol, Cetyl Hydroxyethylcellulose, Glyceryl Caprylate, Sodium Anisate, Sodium Levulinate, Polyglyceryl-6 Behenate, Xanthan Gum, Sodium Hyaluronate
Water
Skin ConditioningAminomethyl Propanol
BufferingGlycolic Acid
Buffering
Lactic Acid
Buffering
Mandelic Acid
Antimicrobial
Isoamyl Laurate
Emollient
Tartaric Acid
Buffering
Propanediol
Solvent
Salicylic Acid
Masking
Malic Acid
Buffering
Butylene Glycol
Humectant
Clitoria Ternatea Flower Extract
Skin ConditioningSodium Hyaluronate
Humectant
Glycyrrhetinic Acid
Skin ConditioningGlycerin
Humectant
Tocopherol
Antioxidant
Bisabolol
Masking
Allantoin
Skin Conditioning
Hydroxyethylcellulose
Emulsion StabilisingHydrogenated Lecithin
Emulsifying
Xanthan Gum
EmulsifyingPolyglyceryl-4 Laurate
Emulsifying
Polyacrylate Crosspolymer-6
Emulsion StabilisingTitanium Dioxide
Cosmetic Colorant
Mica
Cosmetic Colorant
Phenoxyethanol
Preservative
Water, Aminomethyl Propanol, Glycolic Acid, Lactic Acid, Mandelic Acid, Isoamyl Laurate, Tartaric Acid, Propanediol, Salicylic Acid, Malic Acid, Butylene Glycol, Clitoria Ternatea Flower Extract, Sodium Hyaluronate, Glycyrrhetinic Acid, Glycerin, Tocopherol, Bisabolol, Allantoin, Hydroxyethylcellulose, Hydrogenated Lecithin, Xanthan Gum, Polyglyceryl-4 Laurate, Polyacrylate Crosspolymer-6, Titanium Dioxide, Mica, Phenoxyethanol
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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 GlycerinPropanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.Â
It’s often used to:
Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
Learn more about PropanediolSalicylic Acid (also known as beta hydroxy acid or BHA) is a well-known ingredient for treating skin that struggles with acne and clogged pores. It exfoliates both the skin's surface and deep within the pores to help clear out buildup, control oil, and reduce inflammation.
Unlike AHAs (alpha hydroxy acids), salicylic acid is oil-soluble. This allows it to penetrate into pores which makes it especially effective for treating blackheads and preventing future breakouts.
Salicylic acid is also known for its soothing properties. It has a similar structure to aspirin and can calm inflamed or irritated skin, making it a good option for acne-prone skin that is also sensitive.
Concentrations of 0.5-2% are recognized by the U.S. FDA as an over-the-counter topical acne product.
It can cause irritation and/or dryness if one's skin already has a compromised moisture barrier, so it's best to focus on repairing that before introducing this ingredient into your routine.
While salicylic acid does not increase sun sensitivity, it’s still important to wear sunscreen daily to protect your skin.
If you are looking for the ingredient called BHA or Butylated Hydroxyanisole, click here.
Learn more about Salicylic AcidSodium 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 HyaluronateTocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.
Vitamin E also helps keep your natural skin lipids healthy. Your lipid skin barrier naturally consists of lipids, ceramides, and fatty acids. Vitamin E offers extra protection for your skin’s lipid barrier, keeping your skin healthy and nourished.
Another benefit is a bit of UV protection. Vitamin E helps reduce the damage caused by UVB rays. (It should not replace your sunscreen). Combining it with Vitamin C can decrease sunburned cells and hyperpigmentation after UV exposure.
You might have noticed Vitamin E + C often paired together. This is because it is great at stabilizing Vitamin C. Using the two together helps increase the effectiveness of both ingredients.
There are often claims that Vitamin E can reduce/prevent scarring, but these claims haven't been confirmed by scientific research.
Learn more about TocopherolWater. 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 WaterXanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.
On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.
Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.
Learn more about Xanthan GumIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
FaceTheory BHA Exfoliating Serum S3 19 ingredients
Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel 26 ingredients
Reviews
Here's what our community thinks
