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

1
Water (Aqua) (Eau)
1
Water
2
Alcohol Denatured
2
Alcohol Denatured
3
Propylene Glycol
3
Diaminopyrimidine Oxide
4
Cetearyl Alcohol
4
Arginine
5
Dicaprylyl Ether
5
Citric Acid
6
Cetyl Esters
6
PEG-40 Hydrogenated Castor Oil
7
Behentrimonium Chloride
7
Menthoxypropanediol
8
Polysorbate-20
8
Safflower Glucoside
-- Show others --
Uniqueness14 out of 21
66.7%
Uniqueness12 out of 19
63.2%

Positive Effects

Find out what good effects the product has

ECO Metrics

Find out how eco-friendly the components are
Vegan
No
No
Cruelty free
No
No
Reef friendly
Yes
Yes
Ozone layer safe
Yes
Yes
Organic score
natural
7 out of 21
33%
chemical
12 out of 21
57%
natural
6 out of 19
32%
chemical
8 out of 19
42%

Concerns

Pay attention to these components
-- Extra information --

Components by Skin Type

Find out what components are good or bad for your skin type
Dry skin
Positive: 2Negative: 1
Propylene Glycol#3Tocopherol#13Alcohol Denatured#2
Oily skin
Positive: 0Negative: 0
Sensitive skin
Positive: 0Negative: 4
Isopropyl Alcohol#12Citric Acid#16Linalool#19Hexyl Cinnamal#20
Dry skin
Positive: 0Negative: 1
Alcohol Denatured#2
Oily skin
Positive: 0Negative: 0
Sensitive skin
Positive: 0Negative: 3
Citric Acid#5Hexyl Cinnamal#10Linalool#12

Detailed view

K18 Leave-in Molecular Repair Hair Mask vs. Kerastase Stimuliste Spray
Position 1

#1Water (Aqua) (Eau)

Origin: No information
Role: No information
-- versus --

#1Water

Origin: natural
Role: Solvent
EWG Rating [ 1 ]

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.

Position 2
Both products have the same component on this position.

#2Alcohol Denatured

Origin: chemical
Role: Antifoaming agent, Antimicrobial agent, Astringent, Masking, Solvent, Viscosity controlling agent
Antiseptic
Alcohols
EWG Rating [ 1 ]
Bad for dry skin
Bad for dry skin

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.

Position 3

#3Propylene Glycol

Origin: chemical
Role: Skin conditioning agent, Fragrance ingredient, Humectant, Solvent, Viscosity controlling agent
Moisturizing
EWG Rating [ 3 ]
CIR Rating [ B ]
Good for dry skin
Good for dry skin

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.

-- versus --

#3Diaminopyrimidine Oxide

Origin: No information
Role: No information
Position 4

#4Cetearyl Alcohol

Origin: chemical
Role: Emollient, Emulsifying agent, Emulsion stabilizer, Foam booster, Surfactant, Viscosity controlling agent
Comedogenic rating [ 2 ]
EWG Rating [ 1 ]
CIR Rating [ A ]

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.

-- versus --

#4Arginine

Origin: chemical
Role: Skin conditioning agent, Antistatic agent, Fragrance ingredient, Hair conditioning, Masking
Antioxidants
Healing
Regeneration
Hair conditioning
EWG Rating [ 1 ]
CIR Rating [ A ]

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.

Position 5

#5Dicaprylyl Ether

Origin: chemical
Role: Skin conditioning agent, Emollient, Solvent
EWG Rating [ 1 ]
-- versus --

#5Citric Acid

Origin: natural
Role: Buffering agent, Chelating agent, Fragrance ingredient, Masking
Antioxidants
Cleansing
Exfoliating
Soothing
Lightening
Lifting
Hair growth stimulating
EWG Rating [ 1 ]
CIR Rating [ A ]

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.

It's an exfoliator, meaning it increases UV sensitivity of your skin. That's why it's very important to use sunscreen after it.
Skin Signal
2023 - 2024

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Disclaimer: All the information on the website is not a medical advice. Visit a doctor if you have problems.

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