
Kirkland Signature Moisture Conditioner is a product with 45 ingredients: Water, Cyclopentasiloxane, Cetearyl Alcohol, Stearyl Alcohol, Cetrimonium Chloride, Behentrimonium Methosulfate, Helianthus Annuus (Sunflower) Oil, Lycium Barbarum (Matrimony Vine) Fruit Extract, Aloe Barbadensis (Aloe Vera) Leaf Extract, Camellia Sinensis (Green Tea) Leaf Extract and 35 more.
Contains: AHA - Citric Acid; PHA - Gluconolactone; Vitamins - Panthenol; Antioxidant - Lycium Barbarum (Matrimony Vine) Fruit Extract, Aloe Barbadensis (Aloe Vera) Leaf Extract, Camellia Sinensis (Green Tea) Leaf Extract, Persea Gratissima (Avocado) Fruit Extract, Gluconolactone, Citric Acid;
Organic score: 33% natural, 56% chemical. Vegan - No; Cruelty free - No; Reef safe - Yes;
Positive effects
Concerns
INCI - Full Breakdown
Water is a great solvent. It’s neutral and doesn’t provide any strong positive or negative effects. It just helps components to mix better and to transport active components.
Cyclopentasiloxane is a fluid silicone. It’s non-greasy and doesn’t have any scent or color. It evaporates pretty fast which makes this ingredient essential when it comes to making products that have to dry quickly. It also gives a nice silky feeling when you apply the product to the skin and hair. It leaves a thin film that protects the skin after evaporation.
Cyclopentasiloxane is chemically neutral, meaning it doesn’t react with other components.
Cetearyl Alcohol is used mostly for formulation purposes. It’s a very good emulsifier and emulsion stabilizer. It helps the ingredients mix better and it makes the product spread on your skin evenly. It also makes the product thicker. It doesn’t belong to harmful alcohols and it will not dry your skin.

Stearyl Alcohol creates a barrier on the skin's surface lowering the evaporation of water and making it hydrated for a longer time. This barrier helps the skin to recover after deep cleansing. It also makes the skin look smooth. Though it belongs to alcohols, it's a fatty alcohol and it doesn't make your skin dry.
Cetrimonium Chloride is used mostly for formulation purposes and doesn't provide any strong skincare effects. Used mostly to help mix different components together. It also helps to increase the shelf life of the product. CIR safety report tells that this ingredient was found to be “…safe for use in rinse‐off products and …safe for use at concentrations of up to 0.25% in leave‐on products.”
In the European Union (EU), cetrimonium chloride and steartrimonium chloride were reported to be used as a preservative at up to 0.1%. They are also used in rinse-off hair care products at up to 2.5%, leave-on hair products at up to 1.0%, and in leave-on facial cream products at up to 0.5%.
Helianthus Annuus (Sunflower) Oil is an ingredient known from ancient times. It’s the oil people receive from Sunflower Seeds and use for different purposes, including cooking. It contains a lot of Lenoic acid which moisturizes the skin, makes it softer, and reduces inflammation. The oil also works as an occlusive agent that forms a protective film and helps to keep skin hydrated.
As for haircare, it’s the second most popular basic oil used in haircare products. It helps to lower hair fragility and make hair softer.

Green Tea Leaf Extract is a great antioxidant often used in Korean skincare products. It contains EGCG - the most effective flavonoid. It makes the skin look fresh, fills it with vitamines, and helps to prevent aging. It also helps to lower inflammation.
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