Comparison between Lazartigue Stronger Hair Serum vs. Kerastase Serum Extentioniste

Find out which product is better for your skin.

29 Ingredients 30

1
Water
1
Water
2
Propanediol
2
Polyquaternium-37
3
Butylene Glycol
3
Paraffinum Liquidum/​mineral Oil
4
Polysorbate-20
4
Amodimethicone
5
Caprylyl/Capryl Glucoside
5
Polysorbate-20
6
Pentylene Glycol
6
Quaternium-87
7
Cellulose Gum
7
Stearyl Alcohol
8
Methyl Diisopropyl Propionamide
8
Menthoxypropanediol
-- Show others --
Uniqueness25 out of 29
86.2%
Uniqueness26 out of 30
86.7%

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
11 out of 29
38%
chemical
15 out of 29
52%
natural
6 out of 30
20%
chemical
21 out of 30
70%

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: 0
Butylene Glycol#3Glycerin#12
Oily skin
Positive: 0Negative: 0
Sensitive skin
Positive: 0Negative: 3
Citric Acid#15Limonene#23Linalool#26
Dry skin
Positive: 3Negative: 0
Stearyl Alcohol#7Propylene Glycol#12Tocopherol#27
Oily skin
Positive: 1Negative: 1
Camellia Sinensis (Green Tea) Leaf Extract#25Sorbitan Oleate#20
Sensitive skin
Positive: 0Negative: 1
Isopropyl Alcohol#17

Detailed view

Lazartigue Stronger Hair Serum vs. Kerastase Serum Extentioniste
Position 1
Both products have the same component on this position.

#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

#2Propanediol

Origin: chemical
Role: Solvent, Viscosity controlling agent
Moisturizing
Hair conditioning
EWG Rating [ 2 ]

Propanediol is a good solvent, emollient and humectant. It helps to moisturize the skin and prevent moisture loss. In haircare products, it conditions hair and improves absorption of the product.

-- versus --

#2Polyquaternium-37

Origin: chemical
Role: Antistatic agent, Film former, Hair fixative
Antistatic
Hair conditioning
Hair gloss
Hair protection
EWG Rating [ 1 ]
CIR Rating [ B ]
Position 3

#3Butylene Glycol

Origin: chemical
Role: Skin conditioning agent, Fragrance ingredient, Humectant, Masking, Solvent, Viscosity controlling agent
Moisturizing
Softening
Hair protection
Comedogenic rating [ 1 ]
EWG Rating [ 1 ]
CIR Rating [ A ]
Good for dry skin
Good for dry skin

Butylene Glycol is a very popular synthetic alcohol. It helps the product to absorb deeper and faster. It is also a solvent for other ingredients. As for the skin benefits, it helps to attract water and helps to make the skin softer.

Unlike many other “Glycols”, it is not harmful and that's why it is used in many products. It was approved by US FDA and US EPA for usage.

-- versus --

#3Paraffinum Liquidum/​mineral Oil

Origin: No information
Role: No information
Position 4

#4Polysorbate-20

Origin: chemical
Role: Emulsifying agent, Fragrance ingredient, Surfactant
Nutrifying
Malassezia unsafe
EWG Rating [ 3 ]
CIR Rating [ B ]

Polysorbate 20 doesn’t have any notable skin benefits but is used in cosmetics quite often. Manufacturers use it for formulation purposes. It improves the scent, texture, and feel of the product.

-- versus --

#4Amodimethicone

Origin: chemical
Role: Hair conditioning
Hair conditioning
Hair structure improvement
Hair gloss
Silicones
EWG Rating [ 1 ]
CIR Rating [ A ]
Position 5

#5Caprylyl/Capryl Glucoside

Origin: chemical
Role: Cleansing agent, Foaming, Surfactant
EWG Rating [ 1 ]
-- versus --

#5Polysorbate-20

Origin: chemical
Role: Emulsifying agent, Fragrance ingredient, Surfactant
Nutrifying
Malassezia unsafe
EWG Rating [ 3 ]
CIR Rating [ B ]

Polysorbate 20 doesn’t have any notable skin benefits but is used in cosmetics quite often. Manufacturers use it for formulation purposes. It improves the scent, texture, and feel of the product.

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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