Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Kiehl's Clearly Corrective Dark Spot Solution

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Kiehl's Clearly Corrective Dark Spot Solution Detailed comparison of Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant US versus Kiehl's Clearly Corrective Dark Spot Solution. This smoothing ex

This source-based comparison does not add ratings or recommend a winner.

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant Versus Kiehl's Clearly Corrective Dark Spot Solution Detailed comparison of Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant US versus Kiehl's Clearly Corrective Dark Spot Solution. This smoothing exfoliator is formulated around Salicylic Acid to refine skin texture and refine the look of pores. This brightening treatment is formulated around 3-O-Ethyl Ascorbic Acid and Salicylic Acid to fade the look of dark spots and brighten dull-looking skin. Water Methylpropanediol Butylene Glycol Salicylic Acid Polysorbate 20 Camellia Oleifera Leaf Sodium Hydroxide Tetrasodium EDTA Water, Methylpropanediol, Butylene Glycol, Salicylic Acid, Polysorbate 20, Camellia Oleifera Leaf, Sodium Hydroxide, Tetrasodium EDTA Propylene Glycol Glycerin Alcohol Denat. PEG/PPG/Polybutylene Glycol-8/5/3 Glycerin Hydroxypropyl Tetrahydropyrantriol 3-O-Ethyl Ascorbic Acid PPG-6-Decyltetradeceth-30 Phenoxyethanol Xanthan Gum Hydroxyethylcellulose Potassium Hydroxide Citric Acid Sodium Citrate Tocopheryl Acetate Lavandula Angustifolia Oil Disodium EDTA Adenosine Linalool Tocopherol Citrus Aurantium Tachibana Peel Extract Paeonia Suffruticosa Root Extract Water, Propylene Glycol, Glycerin, Alcohol Denat., PEG/PPG/Polybutylene Glycol-8/5/3 Glycerin, Hydroxypropyl Tetrahydropyrantriol, 3-O-Ethyl Ascorbic Acid, PPG-6-Decyltetradeceth-30, Phenoxyethanol, Salicylic Acid, Xanthan Gum, Hydroxyethylcellulose, Potassium Hydroxide, Citric Acid, Sodium Citrate, Tocopheryl Acetate, Lavandula Angustifolia Oil, Disodium EDTA, Adenosine, Linalool, Butylene Glycol, Tocopherol, Citrus Aurantium Tachibana Peel Extract, Paeonia Suffruticosa Root Extract These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Butylene Glycol (or BG) is used within cosmetic products for a few different reasons: Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients. Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness. 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. 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. If you see this, drink a glass of water. Remember to stay hydrated!