Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

Kiehl's Eye Fuel Versus La Roche-Posay Pure Vitamin C Eye Cream

Kiehl's Eye Fuel Versus La Roche-Posay Pure Vitamin C Eye Cream Detailed comparison of Kiehl's Eye Fuel versus La Roche-Posay Pure Vitamin C Eye Cream. This anti-aging eye moisturizer is formulated around Niacinamide and Caffeine to soften the look of wrinkles

This source-based comparison does not add ratings or recommend a winner.

Kiehl's Eye Fuel Versus La Roche-Posay Pure Vitamin C Eye Cream Detailed comparison of Kiehl's Eye Fuel versus La Roche-Posay Pure Vitamin C Eye Cream. This anti-aging eye moisturizer is formulated around Niacinamide and Caffeine to soften the look of wrinkles and brighten dull-looking 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 Dimethicone Glycerin Niacinamide Methyl Methacrylate Crosspolymer Caffeine Ethylhexyl Palmitate Dimethicone/Vinyl Dimethicone Crosspolymer Dimethicone/PEG-10/15 Crosspolymer PEG-10 Dimethicone Hydroxyethylpiperazine Ethane Sulfonic Acid Sodium Chloride Perlite Phenoxyethanol Chlorphenesin Sodium Citrate P-Anisic Acid Tocopherol Disodium EDTA Ascorbyl Glucoside Adenosine Glycine Soja Protein Dipropylene Glycol Caprylyl Glycol Sodium Cocoyl Glutamate Chlorhexidine Digluconate N-Hydroxysuccinimide Potassium Sorbate Ethylhexylglycerin Sodium Benzoate Palmitoyl Oligopeptide Chrysin Palmitoyl Tetrapeptide-7 Water, Dimethicone, Glycerin, Niacinamide, Methyl Methacrylate Crosspolymer, Caffeine, Ethylhexyl Palmitate, Dimethicone/Vinyl Dimethicone Crosspolymer, Dimethicone/PEG-10/15 Crosspolymer, PEG-10 Dimethicone, Hydroxyethylpiperazine Ethane Sulfonic Acid, Sodium Chloride, Perlite, Phenoxyethanol, Chlorphenesin, Sodium Citrate, P-Anisic Acid, Tocopherol, Disodium EDTA, Ascorbyl Glucoside, Adenosine, Glycine Soja Protein, Dipropylene Glycol, Caprylyl Glycol, Sodium Cocoyl Glutamate, Chlorhexidine Digluconate, N-Hydroxysuccinimide, Potassium Sorbate, Ethylhexylglycerin, Sodium Benzoate, Palmitoyl Oligopeptide, Chrysin, Palmitoyl Tetrapeptide-7 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 Dimethiconol Hydrolyzed Hyaluronic Acid Acetyl Dipeptide-1 Cetyl Ester Xanthan Gum Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate 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. 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). 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. This ingredient is a silicone elastomer that works as a texture enhancer, adds a silky slip, and also helps absorb excess oil. Because it's a large macromolecule that's insoluble in water and chemically inert, it's not expected to penetrate or be absorbed into skin. Human patch tests with a facial lotion containing 1% of this ingredient found no sensitization. Disodium EDTA is a chelating agent. It grabs onto and deactivates metal ions that sneak into your products from water, packaging, or air. This ingredient mainly works behind the scenes and helps with: On top of that, this ingredient can counteract the effects of hard water by binding to the minerals in it. One thing worth knowing is that Disodium EDTA has been shown to be a mild penetration enhancer. It can help other ingredients absorb into skin more effectively which can be a double-edged sword (great for actives, but can also make the active too strong if you have sensitive skin). Clinical patch testing showed no significant skin irritation at typical use concentrations and minimal dermal absorption. You'll most likely see this ingredient near the end of an ingredient list. It's typically found in concentrations less than 1%. 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 ski