K18 Hair Leave-In Molecular Repair Hair Mask Versus L'Oréal Professionnel Absolut Repair Protein Treatment Hair Mask

K18 Hair Leave-In Molecular Repair Hair Mask Versus L'Oréal Professionnel Absolut Repair Protein Treatment Hair Mask Detailed comparison of K18 Hair Leave-In Molecular Repair Hair Mask Original versus L'Oréal Professionnel Absolut Repair Protein Treatment Hair Mask. No key ingredients Water Alcohol Denat. Propylene Glycol Cetearyl Alcohol Dicaprylyl Ether Cetyl Esters Behentrimonium Chloride Polysorbate 20 Sh-Oligopeptide-78 Hydrolyzed Wheat Protein Hydrolyzed Wheat Starch Isopropyl Alcohol Tocopherol Phenoxyethanol Potassium Sorbate Citric Acid Parfum Geraniol Linalool Hexyl Cinnamal Benzyl Alcohol Water, Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, Sh-Oligopeptide-78, Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Parfum, Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol Euphorbia Cerifera Cera Amodimethicone Glycerin Trideceth-6 Lactic Acid Chlorhexidine Digluconate Cetrimonium Chloride Limonene Sodium Hydroxide Chenopodium Quinoa Seed Extract Hydroxypropyltrimonium Hydrolyzed Wheat Protein CI 19140 CI 15985 Water, Cetearyl Alcohol, Behentrimonium Chloride, Euphorbia Cerifera Cera, Amodimethicone, Cetyl Esters, Isopropyl Alcohol, Glycerin, Phenoxyethanol, Trideceth-6, Linalool, Lactic Acid, Hexyl Cinnamal, Chlorhexidine Digluconate, Cetrimonium Chloride, Limonene, Sodium Hydroxide, Chenopodium Quinoa Seed Extract, Hydroxypropyltrimonium Hydrolyzed Wheat Protein, CI 19140, CI 15985, Parfum These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. This ingredient is a preservative and often used for it's anti-static properties. You'll most likely see this ingredient in hair conditioners. It does not cause irritation or sensitization in leave-on products at 1-5%. Cetearyl alcohol is a waxy mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is an emollient and emulsifier. Despite having "alcohol" in its name, it has nothing to do with drying solvent alcohols; the FDA also allows "alcohol-free" products to contain fatty alcohols like this ingredient. It plays several roles in a formula: Typical use levels for this ingredient sit around 1-10% and the Cosmetic Ingredient Review Expert Panel has affirmed safety at concentrations up to 25% in leave-on products. Multiple assessments have found it to be non-irritating and non-sensitizing to most people. However, there have been some cases of allergic contact dermatitis in patients with chronically compromised skin barriers. Cetearyl alcohol has a comedogenic rating of 2 and irritancy rating of 1. Both of these numbers come from the 1989 study that used rabbit ears; a "2" means mildly comedogenic and a "1" means low irritancy. Here's the catch: rabbit skin is more sensitive than human skin and throws a lot of false positives. A 1996 reappraisal found that ingredients rated 1-2 in the rabbit ear tests are generally safe for humans. Remember comedogenic ratings are unable to assess the entire formula of a product or how it will react on your skin. Just be sure to patch test if you are unsure about certain ingredients. This ingredient is not fungal acne safe. Cetearyl alcohol is a fatty alcohol with chain lengths that fall within the range that Malassezia can metabolize. A 2019 study has also observed Malassezia growth in the presence of this ingredient, confirming it to be not-fungal acne safe. Cetyl Esters is an emollient with an interesting backstory: it's a synthetic wax originally designed to be a copy of spermaceti, a waxy material that used to be harvested from whales. This ingredient delivers the same "velvety" feel without anything animal-derived (usually made from coconut or palm-sourced fatty alcohols/acids). Chemically, it's a blend of esters from 14-18 fatty acids and alcohols that is a solid at room temperature but melts on contact with skin. It helps soften and smooth the skin while improving the feel and spread of products. Typical use concentrations range from 1-10% (most commonly 2-5%). The CIR Expert Panel has concluded it's safe as used and has shown no skin irritation in available studies. Because it's a blend of fatty acid esters in the chain-length range that Malassezia can feed on, it may not be fungal acne safe. Hexyl Cinnamal is a fragrance ingredient with a similar scent to jasmine. It can be naturally found in chamomile essential oil. This ingredient is a known EU allergen and