Sebastian Professional Penetraitt Overnight Repair Serum Versus Kérastase Nutritive 8H Magic Night Serum Hydrating Treatment
Updated on March 17, 2025
Overview
What they are
These products are both reef safe hair serums. They have a total of 11 ingredients in common
Cool Features
They both contain niacinamide
Suited For
They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing and dark spots
Free From
They both do not contain any oils, parabens or sulfates
What's Inside
They both contain harsh alcohols, common allergens, fragrances and silicones
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
Sebastian Professional Penetraitt Overnight Repair Serum 21 ingredients
Kérastase Nutritive 8H Magic Night Serum Hydrating Treatment 29 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
Sebastian Professional Penetraitt Overnight Repair Serum 21 ingredients
Kérastase Nutritive 8H Magic Night Serum Hydrating Treatment 29 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Alcohol Denat.
Antimicrobial
Water
Skin ConditioningNiacinamide
Smoothing
PEG/PPG-20/23 Dimethicone
Emulsion Stabilising
Caffeine
Skin ConditioningParfum
Masking
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingTetrahydroxypropyl Ethylenediamine
Sodium Hyaluronate
Humectant
Glycerin
Humectant
Hexyl Cinnamal
Perfuming
Benzyl Salicylate
Perfuming
PEG-30 Dipolyhydroxystearate
Emulsifying
Linalool
Perfuming
Trideceth-6
EmulsifyingCitronellol
Perfuming
Hydroxycitronellal
Perfuming
Alpha-Isomethyl Ionone
Perfuming
Amyl Cinnamal
Perfuming
Geraniol
Perfuming
Limonene
Perfuming
Alcohol Denat., Water, Niacinamide, PEG/PPG-20/23 Dimethicone, Caffeine, Parfum, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Tetrahydroxypropyl Ethylenediamine, Sodium Hyaluronate, Glycerin, Hexyl Cinnamal, Benzyl Salicylate, PEG-30 Dipolyhydroxystearate, Linalool, Trideceth-6, Citronellol, Hydroxycitronellal, Alpha-Isomethyl Ionone, Amyl Cinnamal, Geraniol, Limonene
Water
Skin ConditioningDimethicone
Emollient
C13-16 Isoalkane
SolventNiacinamide
Smoothing
Glycerin
Humectant
Polyacrylamide
Phenoxyethanol
Preservative
C13-14 Isoparaffin
Emollient
Laureth-7
EmulsifyingPanthenol
Skin Conditioning
Ascorbyl Glucoside
Antioxidant
Butylene Glycol
Humectant
Linalool
Perfuming
Hydroxycitronellal
Perfuming
Benzyl Salicylate
Perfuming
Benzyl Alcohol
Perfuming
Hexyl Cinnamal
Perfuming
Citronellol
Perfuming
Hydrolyzed Wheat Protein
Skin ConditioningAlpha-Isomethyl Ionone
Perfuming
Coumarin
Perfuming
Hydrolyzed Corn Protein
Skin ConditioningHydrolyzed Soy Protein
HumectantLimonene
Perfuming
Iris Florentina Root Extract
MaskingCitric Acid
Buffering
CI 19140
Cosmetic ColorantCI 14700
Cosmetic ColorantParfum
Masking
Water, Dimethicone, C13-16 Isoalkane, Niacinamide, Glycerin, Polyacrylamide, Phenoxyethanol, C13-14 Isoparaffin, Laureth-7, Panthenol, Ascorbyl Glucoside, Butylene Glycol, Linalool, Hydroxycitronellal, Benzyl Salicylate, Benzyl Alcohol, Hexyl Cinnamal, Citronellol, Hydrolyzed Wheat Protein, Alpha-Isomethyl Ionone, Coumarin, Hydrolyzed Corn Protein, Hydrolyzed Soy Protein, Limonene, Iris Florentina Root Extract, Citric Acid, CI 19140, CI 14700, Parfum
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterNiacinamide has emerged as an all-star ingredient due to its many benefits.
It is known to treat acne by reducing inflammation. It also helps fade dark-spots and strengthen the skin by promoting the growth of the ceramide barrier.
Other benefits include smoothing wrinkles and minimizing redness.
The cherry on top? Niacinamide can also help build keratin, a protein that keeps skin firm.
When incorporating niacinamide into your routine, look out for concentration amounts. Typically, 5% niacinamide provides benefits such as fading dark spots. However, if you have sensitive skin, it is better to begin with a smaller concentration.
Niacinamide can be mixed with other ingredients to boost benefits. For instance, it has shown to be effective when used with copper, folic acid, and zinc to treat acne.
Learn more about NiacinamideParfum is a catch-all term for an ingredient or more that is used to give a scent to products.
Also called "fragrance", this ingredient can be a blend of hundreds of chemicals or plant oils. This means every product with "fragrance" or "parfum" in the ingredients list is a different mixture.
For instance, Habanolide is a proprietary trade name for a specific aroma chemical. When used as a fragrance ingredient in cosmetics, most aroma chemicals fall under the broad labeling category of “FRAGRANCE” or “PARFUM” according to EU and US regulations.
The term 'parfum' or 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term.
For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance by INCI standards.
One example is Calendula flower extract. Calendula is an essential oil that still imparts a scent or 'fragrance'.
Depending on the blend, the ingredients in the mixture can cause allergies and sensitivities on the skin. Some ingredients that are known EU allergens include linalool and citronellol.
Parfum can also be used to mask or cover an unpleasant scent.
The bottom line is: not all fragrances/parfum/ingredients are created equally. If you are worried about fragrances, we recommend taking a closer look at an ingredient. And of course, we always recommend speaking with a professional.
Learn more about ParfumGlycerin is already naturally found in your skin. It helps moisturize and protect your skin.
A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.
As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.
Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.
Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.
In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.
This ingredient is organic, colorless, odorless, and non-toxic.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinHexyl 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 may sensitize the skin. The EU requires this ingredient to be listed separately on an ingredients list.
Hexyl Cinnamal is not water soluble but is soluble in oils.
Learn more about Hexyl CinnamalBenzyl Salicylate is a solvent and fragrance additive. It is an ester of benzyl alcohol and salicylic acid. This ingredient can be naturally found in some plants and plant extracts.
In fragrances, Benzyl Salicylate may be a solvent or a fragrance component. In synthetic musk scents, it is used as a solvent. For floral fragrances such as lilac and jasmine, it is used as a fragrance component. The natural scent of Benzyl Salicylate is described as "lightly-sweet, slightly balsamic".
While Benzyl Salicylate has been associated with contact dermatitis and allergies, emerging studies show it may not be caused by this ingredient alone.
However, this ingredient is often used with fragrances and other components that may cause allergies. It is still listed as a known allergen in the EU. We recommend speaking with a professional if you have concerns.
Another study from 2021 shows Benzyl Salicylate may have anti-inflammatory properties.
Learn more about Benzyl SalicylateLinalool is a fragrance and helps add scent to products. It's derived from common plants such as cinnamon, mint, citrus, and lavender.
Like Limonene, this ingredient oxidizes when exposed to air. Oxidized linalool can cause allergies and skin sensitivity.
This ingredient has a scent that is floral, spicy tropical, and citrus-like.
Learn more about LinaloolCitronellol is used to add fragrance/parfum to a product. It is often derived from plants such as roses. In fact, it can be found in many essential oils including geranium, lavender, neroli, and more. The scent of Citronellol is often described as "fresh, grassy, and citrus-like".
Since the Citronellol molecule is already unstable, Citronellol becomes irritating on the skin when exposed to air.
Citronellol is a modified terpene. Terpenes are unsaturated hydrocarbons found in plants. They make up the primary part of essential oils.
Citronellol is not able to be absorbed into deeper layers of the skin. It has low permeability,
Citronellol is also a natural insect repellent.
Learn more about CitronellolHydroxycitronellal is a fragrance created from citronellal. The smell of hydroxycitronellal is often described as "citrus-like" or "melon-like".
Hydroxycitronellal is a known EU allergen and may cause irritation when applied to the skin.
Alpha-Isomethyl Ionone is a fragrance. It can be synthetically created or naturally occurring.
The scent of Alpha-Isomethyl Ionone is described as "flowery" but can also be "woody".
Naturally occurring Alpha-Isomethyl Ionone may be found in Saccharomyces cerevisiae, or the yeast used to make wine and bread.
The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term. For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance.
Learn more about Alpha-Isomethyl IononeLimonene is a fragrance that adds scent and taste to a formulation.
It's found in the peel oil of citrus fruits and other plants such as lavender and eucalyptus. The scent of limonene is generally described as "sweet citrus".
Limonene acts as an antioxidant, meaning it helps neutralize free radicals.
When exposed to air, oxidized limonene may sensitize the skin. Because of this, limonene is often avoided by people with sensitive skin.
The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term. For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance.
Learn more about LimoneneIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Sebastian Professional Penetraitt Overnight Repair Serum 21 ingredients
Kérastase Nutritive 8H Magic Night Serum Hydrating Treatment 29 ingredients
Reviews
Here's what our community thinks
Sebastian Professional Penetraitt Overnight Repair Serum 21 ingredients
Kérastase Nutritive 8H Magic Night Serum Hydrating Treatment 29 ingredients
Repairs your hair super quickly and makes shiny and soft
I loved applying this every night. and I wake up with softer and smoother hair. This smells so good too! Would love to repurchase, but this is so expensive.
