Kiehl's Ultra Facial Moisturizer Versus Naturally Serious After-Dark Natural Peptide Sleeping Cream

Kiehl's Ultra Facial Moisturizer Versus Naturally Serious After-Dark Natural Peptide Sleeping Cream Detailed comparison of Kiehl's Ultra Facial Moisturizer versus Naturally Serious After-Dark Natural Peptide Sleeping Cream. This day moisturizer is formulated around Squalene to hydrate skin. This barrier-repair night moisturizer is formulated around Squalane and Colloidal Oatmeal to strengthen the skin barrier and hydrate skin. Water Propylene Glycol Dicaprylyl Ether Glycerin PEG-100 Stearate Glyceryl Stearate Squalene Hydrogenated Polyisobutene Phenoxyethanol Sorbitan Oleate Caprylyl Glycol Acrylates/C10-30 Alkyl Acrylate Crosspolymer Triethanolamine Beeswax Tocopherol Disodium EDTA Stearic Acid Myristyl Alcohol Prunus Amygdalus Dulcis Oil Prunus Armeniaca Kernel Oil Persea Gratissima Oil Water, Propylene Glycol, Dicaprylyl Ether, Glycerin, PEG-100 Stearate, Glyceryl Stearate, Squalene, Hydrogenated Polyisobutene, Phenoxyethanol, Sorbitan Oleate, Caprylyl Glycol, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Triethanolamine, Beeswax, Tocopherol, Disodium EDTA, Stearic Acid, Myristyl Alcohol, Prunus Amygdalus Dulcis Oil, Prunus Armeniaca Kernel Oil, Persea Gratissima Oil Caprylic/Capric Triglyceride Glyceryl Stearate Se C9-12 Alkane Betaine Inositol Cetearyl Alcohol Undecane Butyrospermum Parkii Butter Propanediol Squalane Pyrus Malus Fruit Extract Aspalathus Linearis Leaf Extract Lycium Barbarum Fruit Extract Punica Granatum Extract Vitis Vinifera Seed Extract Leuconostoc/Radish Root Ferment Filtrate Camellia Sinensis Leaf Extract Apium Graveolens Seed Extract Linum Usitatissimum Seed Extract Angelica Archangelica Root Extract Helianthus Annuus Seed Oil Colloidal Oatmeal Allantoin Ceramide NP Sodium Hydroxide Tocopheryl Acetate Sodium Phytate Sorbitan Trioleate Xanthan Gum Tridecane Coco-Caprylate/Caprate Pentylene Glycol Phenethyl Alcohol Limonene Linalool Citral Citronellol Geraniol Parfum Water, Stearic Acid, Glycerin, Caprylic/Capric Triglyceride, Glyceryl Stearate, Glyceryl Stearate Se, C9-12 Alkane, Betaine, Inositol, Cetearyl Alcohol, Undecane, Butyrospermum Parkii Butter, Propanediol, Squalane, Pyrus Malus Fruit Extract, Aspalathus Linearis Leaf Extract, Lycium Barbarum Fruit Extract, Punica Granatum Extract, Vitis Vinifera Seed Extract, Leuconostoc/Radish Root Ferment Filtrate, Camellia Sinensis Leaf Extract, Apium Graveolens Seed Extract, Linum Usitatissimum Seed Extract, Angelica Archangelica Root Extract, Helianthus Annuus Seed Oil, Colloidal Oatmeal, Allantoin, Ceramide NP, Sodium Hydroxide, Tocopheryl Acetate, Tocopherol, Sodium Phytate, Sorbitan Trioleate, Xanthan Gum, Tridecane, Coco-Caprylate/Caprate, Pentylene Glycol, Phenethyl Alcohol, Limonene, Linalool, Citral, Citronellol, Geraniol, Parfum 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. 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 naturally. Stearic Acid is a fatty acid that is already found in your skin. It's one of the free fatty acids that works alongside ceramides and cholesterols to maintain your barrier. In cosmetics, it is a multitasker: Safety-wise, the CIR Expert Panel has concluded it to be safe in cosmetics when formulated to be non-irritating and non-sensitizing. Free stearic acid is a C18 fatty acid that the Malassezia yeast can substrate, so this ingredient may not be fungal acne safe. Tocopherol is a fat-soluble antioxidant known as Vitamin E. You'll find this ingredient in the vast majority of skincare (for good reason). It works to neutralize free radicals, or unstable molecules generated by UV exposure, pollution, and other environmental stressors, before they can cause oxidative damage to your skin cells. Topically applied tocopherol has been shown to protect against UV damage by ramping up the skin's own natural defense enzymes. It also acts as a skin conditioning agent; some studies show that regular topical use can improve the skin's water-binding capacity over 2-4 weeks. Thi