Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

The INKEY List Polyglutamic Acid Dewy Sunscreen SPF 30 Versus Round Lab Birch Moisturizing Sunscreen SPF 50+ PA++++

The INKEY List Polyglutamic Acid Dewy Sunscreen SPF 30 Versus Round Lab Birch Moisturizing Sunscreen SPF 50+ PA++++ Detailed comparison of The INKEY List Polyglutamic Acid Dewy Sunscreen SPF 30 versus Round Lab Birch Moisturizing Sunscreen SPF 50+ PA++++. This

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The INKEY List Polyglutamic Acid Dewy Sunscreen SPF 30 Versus Round Lab Birch Moisturizing Sunscreen SPF 50+ PA++++ Detailed comparison of The INKEY List Polyglutamic Acid Dewy Sunscreen SPF 30 versus Round Lab Birch Moisturizing Sunscreen SPF 50+ PA++++. This chemical sunscreen covers most of the UV range, lighter on the deep UVA that drives aging. This chemical sunscreen covers the full UV range and blocks ~98% of UVB at SPF 50. Water Octocrylene Glycerin Ethylhexyl Salicylate Coco-Caprylate/Caprate Butyl Methoxydibenzoylmethane Phenylbenzimidazole Sulfonic Acid Triheptanoin Saccharomyces Ferment Cetearyl Alcohol Glyceryl Stearate Se Tromethamine Glyceryl Caprylate Propanediol C9-12 Alkane Dilinoleic Acid/Butanediol Copolymer Sodium Stearoyl Glutamate Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Dimethicone Squalane Hectorite Lauroyl Lysine Hydroxyethylcellulose Caprylhydroxamic Acid Dimethiconol Polysorbate 60 Acrylates/C10-30 Alkyl Acrylate Crosspolymer Oryza Sativa Hull Extract Castor Oil/Ipdi Copolymer Phenoxyethanol Polyglutamic Acid Sorbitan Isostearate Camellia Sinensis Leaf Extract Ipomoea Batatas Root Extract Hydroxyacetophenone Sodium Benzoate 1,2-Hexanediol Caprylyl Glycol Lactobacillus Ferment Lysate Saccharomyces Lysate Water, Octocrylene, Glycerin, Ethylhexyl Salicylate, Coco-Caprylate/Caprate, Butyl Methoxydibenzoylmethane, Phenylbenzimidazole Sulfonic Acid, Triheptanoin, Saccharomyces Ferment, Cetearyl Alcohol, Glyceryl Stearate Se, Tromethamine, Glyceryl Caprylate, Propanediol, C9-12 Alkane, Dilinoleic Acid/Butanediol Copolymer, Sodium Stearoyl Glutamate, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Dimethicone, Squalane, Hectorite, Lauroyl Lysine, Hydroxyethylcellulose, Caprylhydroxamic Acid, Dimethiconol, Polysorbate 60, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Oryza Sativa Hull Extract, Castor Oil/Ipdi Copolymer, Phenoxyethanol, Polyglutamic Acid, Sorbitan Isostearate, Camellia Sinensis Leaf Extract, Ipomoea Batatas Root Extract, Hydroxyacetophenone, Sodium Benzoate, 1,2-Hexanediol, Caprylyl Glycol, Lactobacillus Ferment Lysate, Saccharomyces Lysate Dibutyl Adipate Diethylamino Hydroxybenzoyl Hexyl Benzoate Polymethylsilsesquioxane Ethylhexyl Triazone Niacinamide Methylene Bis-Benzotriazolyl Tetramethylbutylphenol Caprylyl Methicone Diethylhexyl Butamido Triazone Butylene Glycol Betula Platyphylla Japonica Juice Sodium Hyaluronate Hyaluronic Acid Glyceryl Glucoside Dipotassium Glycyrrhizate Allantoin Portulaca Oleracea Extract Artemisia Annua Extract Pinus Sylvestris Leaf Oil Anthemis Nobilis Flower Oil Polyacrylate Crosspolymer-6 Ethylhexylglycerin Ascorbic Acid Adenosine Pentylene Glycol Behenyl Alcohol Poly C10-30 Alkyl Acrylate Polyglyceryl-3 Methylglucose Distearate Decyl Glucoside Xanthan Gum T-Butyl Alcohol Tocopherol Carbomer Water, Dibutyl Adipate, Propanediol, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Polymethylsilsesquioxane, Ethylhexyl Triazone, Niacinamide, Methylene Bis-Benzotriazolyl Tetramethylbutylphenol, Coco-Caprylate/Caprate, Caprylyl Methicone, Diethylhexyl Butamido Triazone, Glycerin, 1,2-Hexanediol, Butylene Glycol, Betula Platyphylla Japonica Juice, Sodium Hyaluronate, Hyaluronic Acid, Glyceryl Glucoside, Dipotassium Glycyrrhizate, Allantoin, Portulaca Oleracea Extract, Artemisia Annua Extract, Pinus Sylvestris Leaf Oil, Anthemis Nobilis Flower Oil, Acrylates/C10-30 Alkyl Acrylate C These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. 1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse. It is a: Humectant, drawing moisture into the skin Emollient, helping to soften skin Solvent, dispersing and stabilizing formulas Preservative booster, enhancing the antimicrobial activity of other preservatives Acrylates/C10-30 Alkyl Acrylate Crosspolymer is a synthetic polymer. It is used to thicken, emulsify, and improve the texture of products. As an emulsifier, it helps stabilize oil-in-water emulsions to give products an elegant feel when applied. It can also form a thin protective film on skin. One study found that a formula using this polymer helped slow down how quickly other ingredients (like DEET) were absorbed through skin. A 2024 study of over 1,300 patients confirmed that sensitization to this ingredient is rare. It is also non-mutagenic and has a clean track record. Coco-Caprylate/Caprate is a lightweight ester created from coconut oil fatty acids, caprylic acid, and capric acid. It is an emollient that helps soften skin and reduce transepidermal water loss (TEWL). What sets it apart from heavier emollients is its ultralight, non-greasy feel. Once applied, this ingredient dries down quickly and leaves a dry, silky finish behind. This also helps improve spreadability and texture. This ingredient has an excellent safety-record and is non-irritating. Typical concentrations for cosmetics range from 0.5-62%. Research on Malassezia growth found no growth on fatty acid esters with chain lengths shorter than 12 carbons (it prefers C11-24). Since Coco-Caprylate/Caprate is built on C8 and C10 fatty acids, it is out of the range that Malassezia metabolizes, and therefore safe for fungal acne. 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