Kiehl's Better Screen UV Serum SPF 50+ Facial Sunscreen With Collagen Peptide Versus Kiehl's Ultra Light Daily UV Defense SPF 50+

Kiehl's Better Screen UV Serum SPF 50+ Facial Sunscreen With Collagen Peptide Versus Kiehl's Ultra Light Daily UV Defense SPF 50+ Detailed comparison of Kiehl's Better Screen UV Serum SPF 50+ Facial Sunscreen With Collagen Peptide versus Kiehl's Ultra Light Daily UV Defense SPF 50+. This chemical sunscreen covers most of the UV range, lighter on the deep UVA that drives aging. This hybrid sunscreen covers the full UV range and blocks ~98% of UVB at SPF 50. Butyl Methoxydibenzoylmethane 3% Homosalate 7% Ethylhexyl Salicylate 5% Octocrylene 7% Water Glycerin C15-19 Alkane Propanediol C12-22 Alkyl Acrylate/Hydroxyethylacrylate Copolymer Tocopherol Sodium Stearoyl Glutamate Butylene Glycol Cetearyl Alcohol Sclerotium Gum Hydroxyacetophenone Caprylyl Glycol Sodium Starch Octenylsuccinate Glyceryl Stearate Jojoba Esters Helianthus Annuus Seed Wax Hydroxypropyl Starch Phosphate Trisodium Ethylenediamine Disuccinate Carbomer Sodium Lactate Sodium Hydroxide Polysorbate 20 Polyglycerin-3 Palmitoyl Tripeptide-1 Palmitoyl Tetrapeptide-7 Butyl Methoxydibenzoylmethane 3%, Homosalate 7%, Ethylhexyl Salicylate 5%, Octocrylene 7%, Water, Glycerin, C15-19 Alkane, Propanediol, C12-22 Alkyl Acrylate/Hydroxyethylacrylate Copolymer, Tocopherol, Sodium Stearoyl Glutamate, Butylene Glycol, Cetearyl Alcohol, Sclerotium Gum, Hydroxyacetophenone, Caprylyl Glycol, Sodium Starch Octenylsuccinate, Glyceryl Stearate, Jojoba Esters, Helianthus Annuus Seed Wax, Hydroxypropyl Starch Phosphate, Trisodium Ethylenediamine Disuccinate, Carbomer, Sodium Lactate, Sodium Hydroxide, Polysorbate 20, Polyglycerin-3, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7 Ethylhexyl Methoxycinnamate Dimethicone Drometrizole Trisiloxane Terephthalylidene Dicamphor Sulfonic Acid Propylene Glycol Titanium Dioxide Alcohol Denat. Triethanolamine Stearic Acid Potassium Cetyl Phosphate Nylon-12 Palmitic Acid PEG-100 Stearate Phenoxyethanol Cetyl Alcohol Cellulose Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine Diethylamino Hydroxybenzoyl Hexyl Benzoate Citric Acid Aluminum Hydroxide Sodium Cocoyl Sarcosinate Tromethamine Scutellaria Baicalensis Extract Scutellaria Baicalensis Root Extract Acrylamide/Sodium Acryloyldimethyltaurate Copolymer Isohexadecane Xanthan Gum Myristic Acid Disodium EDTA Adenosine Polysorbate 80 Arginine Mannitol Disodium Adenosine Triphosphate Rna Pyridoxine Hcl Sorbitan Oleate Sorbitol Pentylene Glycol BHT Histidine Hcl Zea Mays Kernel Extract Sodium Chloride Yeast Extract Phenylalanine Mentha Piperita Extract Rosa Gallica Flower Extract Tyrosine Sorbic Acid Water, Ethylhexyl Methoxycinnamate, Dimethicone, Glycerin, Drometrizole Trisiloxane, Terephthalylidene Dicamphor Sulfonic Acid, Propylene Glycol, Titanium Dioxide, Alcohol Denat., Triethanolamine, Stearic Acid, Potassium Cetyl Phosphate, Nylon-12, Palmitic Acid, PEG-100 Stearate, Glyceryl Stearate, Phenoxyethanol, Cetyl Alcohol, Cellulose, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Citric Acid, Aluminum Hydroxide, Caprylyl Glycol, Sodium Cocoyl Sarcosinate, Carbomer, Tocopherol, Tromethamine, Scutellaria Baicalensis Extract, Scutellaria Baicalensis Root Extract, Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, Isohexadecane, Xanthan Gum, Myristic Acid, Disodium EDTA, Adenosine, Polysorbate 80, Arginine, Mannitol, Disodium Adenosine Triphosphate, Rna, Pyridoxine Hcl, Sorbitan Oleate, Sorbitol, Pentylene Glycol, BHT, Histidine Hc These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Caprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created. Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin. Because it is not a free-fatty acid, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on). Carbomer is a synthetic thickening and gelling agent. It's basically the ingredient that gives a lot of serums, gels, creams, and sunscreens their smooth, non-sticky texture. Although legally permitted at very high levels, carbomers are normally used at concentrations below 1%. It also needs to be neutralized to actually thicken, and because it is a large molecule, it doesn't really penetrate the skin barrier. Allergy-wise, the risk is very low. Clinical studies show carbomers have low potential for skin irritation/sensitization even at concentrations up to 100%. A 2024 UK study patch-tested 1,302 patients and found true allergy to the parent group of carbomer to be rare with no confirmed relevant reactions. 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. Glyceryl Stearate is made by reacting glycerin with stearic acid (typically sourced from plant oils like palm or coconut). It's an emulsifier, emollient, and mild occlusive. Emulsifiers help ingredients like oil and water stay mixed so your formula stays nicely blended and uniform in texture. This ingredient is typically used in concentrations between 1-10%. Studies have found it to be non-sensitizing, non-phototoxic, and non-photoallergenic. A close cousin of this ingredient is Glyceryl Stearate SE ("self-emulsifying"). This just has a small amount of sodium or potassium stearate added so it can emulsify without a co-emulsifier. Since this ingredient is an ester of a C18 fatty acid, it may not be fungal acne safe. The Malassezia yeast can potentially metabolize within the C11-C24 range. Fun fact: The human body also creates Glyceryl Stearate naturall