K18 Hair Leave-In Molecular Repair Hair Mask Versus COSRX Peptide-132 Ultra Perfect Hair Bonding Oil Serum

K18 Hair Leave-In Molecular Repair Hair Mask Versus COSRX Peptide-132 Ultra Perfect Hair Bonding Oil Serum

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Alcohol Denat.

Propylene Glycol

Cetearyl Alcohol

Dicaprylyl Ether

Cetyl Esters

Behentrimonium Chloride

Polysorbate 20

Sh-Oligopeptide-78

Hydrolyzed Wheat Protein

Hydrolyzed Wheat Starch

Isopropyl Alcohol

Tocopherol

Phenoxyethanol

Potassium Sorbate

Citric Acid

Parfum

Geraniol

Linalool

Hexyl Cinnamal

Benzyl Alcohol

Water, Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, Sh-Oligopeptide-78, Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Parfum, Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol

Dimethicone

Hydrogenated Poly(C6-14 Olefin)

Cetyl Ethylhexanoate

Dicaprylyl Carbonate

Dimethiconol

Disiloxane

Aminopropyl Dimethicone

Argania Spinosa Kernel Oil

Hexyldecanol

Limonene

Citronellol

Benzyl Benzoate

Olea Europaea Fruit Oil

Camellia Japonica Seed Oil

Simmondsia Chinensis Seed Oil

Oryza Sativa Bran Oil

Vitis Vinifera Seed Oil

Macadamia Ternifolia Seed Oil

Tripeptide-13

Dimethicone, Hydrogenated Poly(C6-14 Olefin), Cetyl Ethylhexanoate, Dicaprylyl Carbonate, Dimethiconol, Disiloxane, Dicaprylyl Ether, Aminopropyl Dimethicone, Argania Spinosa Kernel Oil, Hexyldecanol, Parfum, Hexyl Cinnamal, Limonene, Citronellol, Tocopherol, Linalool, Benzyl Benzoate, Olea Europaea Fruit Oil, Camellia Japonica Seed Oil, Simmondsia Chinensis Seed Oil, Oryza Sativa Bran Oil, Vitis Vinifera Seed Oil, Macadamia Ternifolia Seed Oil, Tripeptide-13

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Alternatives

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Dicaprylyl Ether is created from caprylic acid. It is a texture-enhancer and emollient.

As an emollient, Dicaprylyl Ether is non-comedogenic. It helps soften and smooth the skin by creating a barrier on top. This barrier helps trap moisture in, helping to hydrate the skin.

Dicaprylyl Ether gives a non-greasy feel and better spreadability to products.

Hexyl 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.

Linalool 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.

Parfum 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.

Tocopherol is a fat-soluble antioxidant known as Vitamin E.

You'll find this ingredient in the vast majority of skincare (for good reason). It works to neutralize free radicals, or unstable molecules generated by UV exposure, pollution, and other environmental stressors, before they can cause oxidative damage to your skin cells.

Topically applied tocopherol has been shown to protect against UV damage by ramping up the skin's own natural defense enzymes.

It also acts as a skin conditioning agent; some studies show that regular topical use can improve the skin's water-binding capacity over 2-4 weeks.

This ingredient is especially loved for being a team player. When combined with Vitamin C, the photoprotective effect of both ingredients roughly doubles and the combo also helps reduce UV-induced DNA damage.

This ingredient has some brightening potential but it's more of a prevention ingredient than spot-fader. Cell studies show it can slow down melanin production but it's worth noting that it's not the most powerful brightener out there.

In formulations, it also serves as a stabilizer that helps protect other oxidation-prone ingredients from degrading.

Concentrations usually range from 0.1-1% in most leave-on products.

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