L'Oreal Bond Repair Leave-In Serum For Damaged Hair - UK Versus BioSilk Silk Therapy Serum
Updated on June 27, 2025
Overview
What they are
These products are both reef safe hair serums. They have a total of 9 ingredients in common
Suited For
They're both likely to be good for dry skin and scar healing
Free From
They both do not contain any 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
L'Oreal Bond Repair Leave-In Serum For Damaged Hair 29 ingredients
BioSilk Silk Therapy Serum 19 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
L'Oreal Bond Repair Leave-In Serum For Damaged Hair 29 ingredients
BioSilk Silk Therapy Serum 19 ingredients
Key Ingredients
Benefits
Concerns
Benefits
Concerns
Ingredients Side-by-side
Isododecane
EmollientDipropylene Glycol
MaskingWater
Skin ConditioningDimethicone
Emollient
Alcohol Denat.
Antimicrobial
Glycerin
Humectant
Dimethiconol
Emollient
PEG-14 Dimethicone
Skin Conditioning
Hydroxyethyl Urea
Humectant
Parfum
Masking
Citric Acid
Buffering
Sodium Citrate
BufferingHydroxycitronellal
Perfuming
Phenoxyethanol
Preservative
PEG-60 Hydrogenated Castor Oil
Emulsifying
Polyacrylamide
Limonene
Perfuming
Linalool
Perfuming
Benzyl Benzoate
Antimicrobial
Benzyl Alcohol
Perfuming
Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
Antioxidant
Propylene Glycol
Humectant
Isoeugenol
Perfuming
Geraniol
Perfuming
Citronellol
Perfuming
Citral
Perfuming
Laureth-7
EmulsifyingHexyl Cinnamal
Perfuming
C13-16 Isoparaffin
Solvent
Isododecane, Dipropylene Glycol, Water, Dimethicone, Alcohol Denat., Glycerin, Dimethiconol, PEG-14 Dimethicone, Hydroxyethyl Urea, Parfum, Citric Acid, Sodium Citrate, Hydroxycitronellal, Phenoxyethanol, PEG-60 Hydrogenated Castor Oil, Polyacrylamide, Limonene, Linalool, Benzyl Benzoate, Benzyl Alcohol, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Propylene Glycol, Isoeugenol, Geraniol, Citronellol, Citral, Laureth-7, Hexyl Cinnamal, C13-16 Isoparaffin
Cyclopentasiloxane
Emollient
Cyclotetrasiloxane
Emollient
Dimethiconol
Emollient
Cyclohexasiloxane
Emollient
Alcohol Denat.
Antimicrobial
C12-15 Alkyl Benzoate
AntimicrobialPhenoxyethanol
Preservative
Panthenol
Skin Conditioning
Ethyl Ester Of Hydrolyzed Silk
Skin ConditioningParfum
Masking
Benzyl Benzoate
Antimicrobial
Hexyl Cinnamal
Perfuming
Linalool
Perfuming
Alpha-Isomethyl Ionone
Perfuming
Citronellol
Perfuming
Geraniol
Perfuming
Hydroxycitronellol
Perfuming
Butylphenyl Methylpropional
Perfuming
Eugenol
Perfuming
Cyclopentasiloxane, Cyclotetrasiloxane, Dimethiconol, Cyclohexasiloxane, Alcohol Denat., C12-15 Alkyl Benzoate, Phenoxyethanol, Panthenol, Ethyl Ester Of Hydrolyzed Silk, Parfum, Benzyl Benzoate, Hexyl Cinnamal, Linalool, Alpha-Isomethyl Ionone, Citronellol, Geraniol, Hydroxycitronellol, Butylphenyl Methylpropional, Eugenol
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Alcohol Denat. is an alcohol with a denaturant property. It is created by mixing ethanol with other additives.
This ingredient gets a bad rep because it is irritating and drying - mostly due to its astringent property. Astringents draw out natural oils in tissue, constricting pores and leaving your skin dried out.
However, alcohol denat. is not all that bad.
Due to its low molecular weight, alcohol denat. tends to evaporate quickly. One study on pig skin found half of applied alcohol evaporated in 10 seconds and less than 3% stayed on skin.
This also helps other ingredients become better absorbed upon application.
Studies are conflicted about whether this ingredient causes skin dehydration. One study from 2005 found adding emollients to propanol-based sanitizer decreased skin dryness and irritation. Another study found irritation only occurs if your skin is already damaged.
Small amounts of alcohol are generally tolerated by oily skin or people who live in humid environments.
The rule of thumb is if this alcohol is near the end of an ingredients list, it will probably not affect your skin much.
Also...
This ingredient has antimicrobial and solvent properties.
The antimicrobial property helps preserve products and increase their shelf life. As a solvent, it helps dissolve other ingredients.
Other types of astringent alcohols include:
Learn more about Alcohol Denat.Benzyl Benzoate is usually created from the condensation of benzoic acid and benzyl alcohol. It is used as a preservative, solvent, and has a floral/balsamic scent in large amounts.
As a preservative, Benzyl Benzoate works against bacteria and fungus. It is often used to treat scabies and lice in medicine.
Solvents are used to keep ingredients together in a product. They can help dissolve ingredients to stable bases or help evenly distribute ingredients throughout the product.
Due to its fragrance, Benzyl Benzoate can be sensitizing and may cause contact dermatitis. It is a known EU allergen. We recommend speaking with a professional if you have any concerns.
Benzyl Benzoate can be naturally found in cranberries and peaches.
Learn more about Benzyl BenzoateCitronellol 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 CitronellolDimethiconol is a silicone that resembles the popular dimethicone. Like other silicones, it is an emollient. Emollients create a thin film on skin to prevent moisture from escaping.
This ingredient helps to create a silky texture and improve spreadability. Due to its high molecular weight and thickness, it is often combined with cyclopentasiloxane.
Geraniol is used to add fragrance/parfum to a product. It is the main component of citronellol. It is a monoterpenoid and an alcohol.
Monoterpenes are naturally found in many parts of different plants.
Geraniol can be found in many essential oils including Rose Oil and Citronella Oil. The scent of Geraniol is often described as "rose-like". Many foods also contain Geraniol for fruit flavoring.
Geraniol can irritate the skin when exposed to air. However, irritation depends on the ability of geraniol to penetrate into the skin. In general, geraniol is not able to penetrate skin easily.
Geraniol is colorless and has low water-solubility. However, it is soluble in common organic solvents.
Like citronellol, it is a natural insect repellent.
2,6-Octadien-1-ol, 3,7-dimethyl-, (2E)-
Learn more about GeraniolHexyl 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 CinnamalLinalool 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 LinaloolParfum 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 ParfumPhenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.
It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.
Ingredient Ratings
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