Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel Versus Algenist Genius Liquid Skin Resurfacing 2% BHA Toner

Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel Versus Algenist Genius Liquid Skin Resurfacing 2% BHA Toner Detailed comparison of Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel versus Algenist Genius Liquid Skin Resurfacing 2% B

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Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel Versus Algenist Genius Liquid Skin Resurfacing 2% BHA Toner Detailed comparison of Paula's Choice Skin Perfecting 25% AHA + 2% BHA Exfoliant Peel versus Algenist Genius Liquid Skin Resurfacing 2% BHA Toner. This smoothing exfoliator is formulated around Glycolic Acid and Lactic Acid to refine skin texture and brighten dull-looking skin. This smoothing toner is formulated around Salicylic Acid and Niacinamide to refine skin texture and refine the look of pores. 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 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 Niacinamide Collagen Amino Acids Parachlorella Beijerinckii Exopolysaccharides Hydrolyzed Collagen Azelaic Acid Decyl Glucoside Eucalyptus Globulus Leaf Extract Lauryl Glucoside Rosmarinus Officinalis Extract Mentha Piperita Extract Citrus Limon Fruit Extract Dextrin Amylopectin Leuconostoc/Radish Root Ferment Filtrate Ethylhexylglycerin Sodium Hydroxide Phytic Acid Citric Acid Sodium Benzoate Potassium Sorbate Water, Propanediol, Salicylic Acid, Niacinamide, Collagen Amino Acids, Parachlorella Beijerinckii Exopolysaccharides, Hydrolyzed Collagen, Azelaic Acid, Glycolic Acid, Decyl Glucoside, Eucalyptus Globulus Leaf Extract, Lauryl Glucoside, Rosmarinus Officinalis Extract, Mentha Piperita Extract, Citrus Limon Fruit Extract, Dextrin, Amylopectin, Leuconostoc/Radish Root Ferment Filtrate, Tocopherol, Ethylhexylglycerin, Sodium Hydroxide, Phytic Acid, Butylene Glycol, Citric Acid, Sodium Benzoate, Potassium Sorbate, 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. 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. Glycolic Acid is arguably the most famous alpha hydroxy acid (AHA) with tons of research backing its benefits. It is found naturally in sugar cane but the form used in skincare is usually synthetic for purity and stability. Glycolic acid removes the top layer of dead skin cells to allow newer and fresher ones to emerge. AHAs work by breaking down the structural “glue” that holds old skin cells in place. When that buildup is gone, your skin can renew itself more efficiently. Research also shows glycolic acid stimulates collagen production, helping to firm and thicken the skin over time. This is one of its biggest advantages over other AHAs. Overall, glycolic acid helps with: Fun fact: Glycolic acid boosts skin hydration by helping it produce molecules that increase hyaluronic acid naturally. To work best, glycolic acid products should have a pH between 3-4 (that’s where exfoliation is most effective but still gentle on skin). The pH and concentration of a product are key to its effectiveness: It is normal to feel a slight stinging sensation when using glycolic acid. This usually fades as your skin adjusts. Because glycolic acid has the smallest molecular size in the AHA family, it can penetrate deeper, which enhances its effectiveness but also makes it more likely to irritate sensitive skin. If your skin is very sensitive or prone to rosacea, glycolic acid may be too strong; in that case, try milder options like lactic acid or a PHA instead. Recent studies suggest glycolic acid might even help protect against UV damage. But don’t skip sunscreen! Freshly exfoliated skin is more sensitive to the sun. Glycolic acid is a skincare superstar. It smooths, brightens, hydrates, and firms the skin. Unless you’re highly sensitive, it’s well worth adding to your routine. Read more about some other popular AHA's here: Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!). It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome. On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive. Another perk of this ingredient is that it stays functional across a wide pH range (3-10). You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhex