K18 Hair Leave-In Molecular Repair Hair Mask Versus Elizavecca Cer-100 Collagen Coating Hair A+ Muscle Curl Cream
K18 Hair Leave-In Molecular Repair Hair Mask Versus Elizavecca Cer-100 Collagen Coating Hair A+ Muscle Curl Cream What's inside Key Ingredients No key ingredients Benefits Concerns Ingredients Side-by-side Water Alcohol Denat. Propylene Glycol Cetearyl Alcohol
K18 Hair Leave-In Molecular Repair Hair Mask Versus Elizavecca Cer-100 Collagen Coating Hair A+ Muscle Curl Cream
What's inside
Key Ingredients
No 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
Cyclopentasiloxane
Dimethicone
Glycerin
Pvp
Polyacrylamide
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
C13-14 Isoparaffin
Tromethamine
1,2-Hexanediol
Caprylyl Glycol
Butylene Glycol
Laureth-7
Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Isohexadecane
Illicium Verum Fruit Extract
Polysorbate 80
Disodium EDTA
Oenothera Biennis Oil
Argania Spinosa Kernel Oil
Chamomilla Recutita Flower Oil
Sorbitan Oleate
Cyclomethicone
Hydrolyzed Collagen
Gelatin
Hydrolyzed Keratin
Avena Sativa Protein Extract
Rosmarinus Officinalis Leaf Extract
Lavandula Angustifolia Flower Extract
Thymus Vulgaris Flower/Leaf/Stem Extract
Origanum Vulgare Extract
Hydrolyzed Corn Protein
Hydrolyzed Soy Protein
Water, Propylene Glycol, Cyclopentasiloxane, Dimethicone, Glycerin, Pvp, Polyacrylamide, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Parfum, C13-14 Isoparaffin, Tromethamine, 1,2-Hexanediol, Caprylyl Glycol, Butylene Glycol, Laureth-7, Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Isohexadecane, Illicium Verum Fruit Extract, Phenoxyethanol, Polysorbate 80, Disodium EDTA, Oenothera Biennis Oil, Argania Spinosa Kernel Oil, Chamomilla Recutita Flower Oil, Sorbitan Oleate, Cyclomethicone, Hydrolyzed Collagen, Gelatin, Hydrolyzed Keratin, Avena Sativa Protein Extract, Rosmarinus Officinalis Leaf Extract, Lavandula Angustifolia Flower Extract, Thymus Vulgaris Flower/Leaf/Stem Extract, Origanum Vulgare Extract, Hydrolyzed Corn Protein, Hydrolyzed Wheat Protein, Hydrolyzed Soy Protein
Reviews
Alternatives
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
This ingredient is a plant-derived protein made by breaking down wheat proteins into smaller amino acids and peptides. It has skin and hair conditioning properties.
People with known wheat allergy or a history of immediate reactions should be cautious with leave-on products containing hydrolyzed wheat proteins.
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.
Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!).
It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome.
On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive.
Another perk of this ingredient is that it stays functional across a wide pH range (3-10).
You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own.
Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU.
Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages.
Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon.
Propylene Glycol is a synthetic, colorless, odorless liquid that has been a staple in cosmetics for decades. It is a skin conditioning agent, humectant, and solvent.
As a humectant, it draw water to the skin to reduce flaking and restore suppleness. It's also a solvent that helps dissolve other actives and keeps formulas stable across temperature changes.
The CIR Expert Panel has confirmed this ingredient to be nontoxic and clinical studies show no sensitization at cosmetic use concentrations.
True allergic reactions are quite rare: a 15-year retrospective study of 6,751 patients found only 0.31% had a positive reaction (and less than half were considered clinically relevant).
It seemed that when sensitization does occur, it's most commonly linked to topical medication (like corticosteroids) and not cosmetics. Allergic contact dermatitis also appears largely limited to individuals with underlying skin conditions.
Overall, propylene glycol is a well-studied ingredient that most people can tolerate without issue.
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. Remember to stay hydrated!