Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

FaceTheory BHA Exfoliating Serum S3 Versus Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel

FaceTheory BHA Exfoliating Serum S3 Versus Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel Detailed comparison of FaceTheory BHA Exfoliating Serum S3 versus Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel. This smoothing serum is

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FaceTheory BHA Exfoliating Serum S3 Versus Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel Detailed comparison of FaceTheory BHA Exfoliating Serum S3 versus Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel. This smoothing serum is formulated around Carnitine and Salicylic Acid to refine skin texture and refine the look of pores. This smoothing exfoliator is formulated around Glycolic Acid and Lactic Acid to refine skin texture and brighten dull-looking skin. 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, 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 Aminomethyl Propanol Glycolic Acid Lactic Acid Mandelic Acid Isoamyl Laurate Tartaric Acid Malic Acid Butylene Glycol Clitoria Ternatea Flower Extract Glycyrrhetinic Acid Bisabolol Allantoin Hydroxyethylcellulose Hydrogenated Lecithin Polyglyceryl-4 Laurate Polyacrylate Crosspolymer-6 Titanium Dioxide Mica Phenoxyethanol 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 Be the first to review These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum. Topically, glycerin does several things at once: Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3. Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin. This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products. Just know very high concentrations (>40%) can feel tacky in low humidity. Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine. Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin. 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. Salicylic 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. Sodium Hyaluronate is the salt form of hyaluronic acid. It is a long sugar chain that is naturally found in your skin, joints, and connective tissue that maintains hydration and elasticity. In skincare, it works as a humectant. It pulls water from the environment and deeper layers of skin and binds it to the surface. Interestingly, the size of the molecule affects its behavior: Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and ba