Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

La Roche-Posay Substiane EYES Versus La Roche-Posay Pure Vitamin C Eye Cream

La Roche-Posay Substiane EYES Versus La Roche-Posay Pure Vitamin C Eye Cream Detailed comparison of La Roche-Posay Substiane EYES versus La Roche-Posay Pure Vitamin C Eye Cream. This anti-aging eye moisturizer is formulated around Butyrospermum Parkii Butter a

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La Roche-Posay Substiane EYES Versus La Roche-Posay Pure Vitamin C Eye Cream Detailed comparison of La Roche-Posay Substiane EYES versus La Roche-Posay Pure Vitamin C Eye Cream. This anti-aging eye moisturizer is formulated around Butyrospermum Parkii Butter and Acetyl Dipeptide-1 Cetyl Ester to soften the look of wrinkles and hydrate skin. This anti-aging eye moisturizer is formulated around Ascorbic Acid and Madecassoside to soften the look of wrinkles and brighten dull-looking skin. Water Glycerin Butyrospermum Parkii Butter Cyclohexasiloxane Prunus Armeniaca Kernel Oil Pentaerythrityl Tetraethylhexanoate Isohexadecane Zea Mays Starch Silica Hydroxypropyl Tetrahydropyrantriol Beeswax Stearic Acid Dimethicone Palmitic Acid PEG-100 Stearate Glyceryl Stearate Propylene Glycol PEG-20 Stearate Bis-PEG-18 Methyl Ether Dimethyl Silane Stearyl Alcohol Dimethiconol Arginine PCA Serine Disodium EDTA Hydrolyzed Linseed Extract Acetyl Dipeptide-1 Cetyl Ester Polysorbate 80 Acrylamide/Sodium Acryloyldimethyltaurate Copolymer Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate Sodium Benzoate Phenoxyethanol Benzoic Acid Water, Glycerin, Butyrospermum Parkii Butter, Cyclohexasiloxane, Prunus Armeniaca Kernel Oil, Pentaerythrityl Tetraethylhexanoate, Isohexadecane, Zea Mays Starch, Silica, Hydroxypropyl Tetrahydropyrantriol, Beeswax, Stearic Acid, Dimethicone, Palmitic Acid, PEG-100 Stearate, Glyceryl Stearate, Propylene Glycol, PEG-20 Stearate, Bis-PEG-18 Methyl Ether Dimethyl Silane, Stearyl Alcohol, Dimethiconol, Arginine PCA, Serine, Disodium EDTA, Hydrolyzed Linseed Extract, Acetyl Dipeptide-1 Cetyl Ester, Polysorbate 80, Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Sodium Benzoate, Phenoxyethanol, Benzoic Acid Limnanthes Alba Seed Oil Ascorbic Acid Mannose Butylene Glycol Paraffinum Liquidum Ammonium Polyacryloyldimethyl Taurate Cetyl Alcohol Polymethylsilsesquioxane Potassium Hydroxide Paraffin Sodium Styrene/Ma Copolymer Microcrystalline Wax Madecassoside Dimethicone/Vinyl Dimethicone Crosspolymer Hydrolyzed Hyaluronic Acid Caprylyl Glycol Xanthan Gum Water, Glycerin, Dimethicone, Butyrospermum Parkii Butter, Limnanthes Alba Seed Oil, Ascorbic Acid, Mannose, Butylene Glycol, Paraffinum Liquidum, Ammonium Polyacryloyldimethyl Taurate, Cetyl Alcohol, PEG-100 Stearate, Glyceryl Stearate, Polymethylsilsesquioxane, Potassium Hydroxide, Paraffin, Sodium Styrene/Ma Copolymer, Microcrystalline Wax, Madecassoside, Dimethicone/Vinyl Dimethicone Crosspolymer, Dimethiconol, Disodium EDTA, Hydrolyzed Hyaluronic Acid, Caprylyl Glycol, Acetyl Dipeptide-1 Cetyl Ester, Xanthan Gum, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Phenoxyethanol These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Acetyl Dipeptide-1 Cetyl Ester is a peptide composed of amino acids arginine and tyrosine. This peptide is considered a neurotransmitter peptide, meaning it has pain-relieving and relaxing properties. It has the ability to calm skin irritation from external factors such as chemical stinging or heat. Neurotransmitter peptides are also often called "botox in a bottle". This is because these peptides have the ability to relax the muscles. Though relaxing the muscles can prevent expression lines (as we have seen in botox), the studies do not show these peptides to be a botox replacement. The effects of this muscle relaxation is also short-term, as opposed to longer-term results from botox. This ingredient is also known as shea butter. It is a plant-derived extract from the nuts of the Africa shea tree and one of the most well-studied emollients. Because it has a high concentration of fatty acids (primarily oleic, stearic, and linoleic) it is able to form a protective barrier on the skin's surface. This helps seal in moisture and prevents transepidermal water loss (TEWL). In vitro research found an increase in skin hydration by 58% and a decrease in TEWL by 37.8% after 24 hours of applying this ingredient (pretty impressive for a single ingredient!). Besides hydration, shea butter also contains triterpenes that have anti-inflammatory potential. In particule, lupeol cinnamate has shown the highest anti-inflammatory activity in vivo. Shea butter also contains vitamins A and E which may contribute to antioxidant activity. While Shea Butter has an SPF rating of about 3-4, it is not a sunscreen replacement. This ingredient may not be fungal acne safe because its fatty acids fall within the C11-C24 range that the Malassezia yeast can metabolize. Dimethicone is a type of synthetic silicone created from natural materials such as quartz. It is also known as polydimethylsiloxane. What it does: Dimethicone comes in different viscosities: Depending on the viscosity, dimethicone has different properties. Ingredients lists don't always show which type is used, so we recommend reaching out to the brand if you have questions about the viscosity. This ingredient is unlikely to cause irritation because it does not get absorbed into skin. However, people with silicone allergies should be careful about using this ingredient. Note: Dimethicone may contribute to pilling. This is because it is not oil or water soluble, so pilling may occur when layered with products. When mixed with heavy oils in a formula, the outcome is also quite greasy. Dimethiconol is a silicone that resembles the popular dimethicone. Like other silicones, it is an emollient. Emollients create a thin film on skin to prevent moisture from escaping. This ingredient helps to create a silky texture and improve spreadability. Due to its high molecular weight and thickness, it i