Comparison between K18 Leave-in Molecular Repair Hair Mask vs. Kerastase Stimuliste Spray
Find out which product is better for your skin.
21 Ingredients 19
Positive Effects
ECO Metrics
Concerns
Components by Skin Type
Detailed view
#1Water (Aqua) (Eau)
#1Water
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.
#2Alcohol Denatured
![Bad for dry skin](https://skinsignal.com/api/web/image/layout/dry_bad.png?w=30&q=50)
Alcohol Denatured is a great bacteria killer. Manufacturers often put it inside products to increase their shelf life.
It’s one of the most harmful alcohols used in skincare. You should use it carefully, especially if you have dry skin. It removes oily barrier from the surface of your skin making it less protected and causing dryness. We advise you to pay attention to the position of this component in a formulation. If it stays below the 6th position it will hardly harm your skin. We also recommend testing the product first before application. If you feel a “cooling effect” it means the product contains a lot of alcohol and it's better to be careful with it.
#3Propylene Glycol
![Good for dry skin](https://skinsignal.com/api/web/image/layout/dry_good.png?w=30&q=50)
Propylene Glycol is a useful componet with many positive effects. It’s a very good moisturizer. It helps to deliver ingredients into deeper layers of the skin. It creates a protective layer on the skin preventing water loss. The component is researched very well and doesn’t have notable side effects. It’s used even for making food.
#3Diaminopyrimidine Oxide
#4Cetearyl Alcohol
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.
#4Arginine
Arginine is an essential amino acid. It works as an antioxidant when used in skincare products. It also helps the skin to regenerate and stay hydrated. In hair care, it is used to decrease damage from oxidative coloring or bleaching.
#5Dicaprylyl Ether
#5Citric Acid
Citric Acid is one of the AHAs and it is a super useful component! It’s a great antioxidant. It acts as a soft peeling that removes dead cells and kills bacteria. It becomes even more effective if used with other cosmetic acids. Combined formulations are more active, but can irritate sensitive skin if used too often. The component can also whiten the skin and remove dark areas.