Overview
What it is
Hair mask with 18 ingredients
Cool Features
It is cruelty-free and reef safe
Suited For
It has ingredients that are good for dry skin, sensitive skin, oily skin and dark spots
Free From
It doesn't contain any harsh alcohols, common allergens or parabens
Fun facts
One 'N Only is from United States.
We independently verify ingredients and our claims are backed by peer-reviewed research. Does this product need an update? Let us know.
What's inside
Ingredients List
Water
Skin ConditioningCetearyl Alcohol
EmollientBehentrimonium Methosulfate
SurfactantAmodimethicone
Parfum
MaskingAcetamide Mea
HumectantCanola Oil
EmollientButyrospermum Parkii Butter
Skin ConditioningSodium PCA
HumectantHydrolyzed Vegetable Protein Pg-Propyl Silanetriol
Skin ConditioningHydrolyzed Keratin
HumectantArgania Spinosa Kernel Oil
EmollientTrideceth-12
EmulsifyingCetrimonium Chloride
AntimicrobialMethylchloroisothiazolinone
PreservativeMethylisothiazolinone
PreservativeCI 14700
Cosmetic ColorantCI 47005
Cosmetic ColorantWater, Cetearyl Alcohol, Behentrimonium Methosulfate, Amodimethicone, Parfum, Acetamide Mea, Canola Oil, Butyrospermum Parkii Butter, Sodium PCA, Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol, Hydrolyzed Keratin, Argania Spinosa Kernel Oil, Trideceth-12, Cetrimonium Chloride, Methylchloroisothiazolinone, Methylisothiazolinone, CI 14700, CI 47005
Benefits
Concerns
Ingredients Explained
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!
Learn more about WaterCetearyl alcohol is a waxy mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is an emollient and emulsifier.
Despite having "alcohol" in its name, it has nothing to do with drying solvent alcohols; the FDA also allows "alcohol-free" products to contain fatty alcohols like this ingredient.
It plays several roles in a formula:
Typical use levels for this ingredient sit around 1-10% and the Cosmetic Ingredient Review Expert Panel has affirmed safety at concentrations up to 25% in leave-on products.
Multiple assessments have found it to be non-irritating and non-sensitizing to most people.
However, there have been some cases of allergic contact dermatitis in patients with chronically compromised skin barriers.
Cetearyl alcohol has a comedogenic rating of 2 and irritancy rating of 1. Both of these numbers come from the 1989 study that used rabbit ears; a "2" means mildly comedogenic and a "1" means low irritancy.
Here's the catch: rabbit skin is more sensitive than human skin and throws a lot of false positives. A 1996 reappraisal found that ingredients rated 1-2 in the rabbit ear tests are generally safe for humans.
Remember comedogenic ratings are unable to assess the entire formula of a product or how it will react on your skin. Just be sure to patch test if you are unsure about certain ingredients.
This ingredient is not fungal acne safe. Cetearyl alcohol is a fatty alcohol with chain lengths that fall within the range that Malassezia can metabolize.
A 2019 study has also observed Malassezia growth in the presence of this ingredient, confirming it to be not-fungal acne safe.
Learn more about Cetearyl AlcoholBehentrimonium Methosulfate is an ammonium salt. It is mainly used to prevent static in haircare products as a surfactant.
Surfactants have differing ends: one side is hydrophilic while the other end is hydrophobic.
Surfactants also help your cleansers remove pollutants more easily from the skin.
Learn more about Behentrimonium MethosulfateThis water-soluble silicone is used for its hydrating and softening properties. It is used to add a silky feel to skincare products and has great benefits for haircare.
In haircare, this ingredient:
- Adds shine
- Protects color
- Offers thermal protection
- Boosts hair strength
- Does not build up as easily
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.
Learn more about ParfumWe don't have a description for Acetamide Mea yet.
Canola Oil is a plant-oil and low-erucic-acid variety of rapeseed. Like other seed oils, it functions as an emollient that softens skin and slows water loss.
Its fatty acid profile is mostly linoleic acid (55-65%) with some oleic, palmitic, and stearic acids. There are also some small amounts of vitamin E and plant sterols.
The sterol content is pretty interesting:
In a controlled human study, a single application of canola oil and especially its sterol-enriched fraction reduced visible irritation, redness, and water loss caused by SLS. Plain canola oil and most other tested oils did little on healthy, un-irritated skin.
It's pretty much just a calm, moisturizing oil that helps with soothing if your skin is already irritated.
Since canola oil is made up of C18 fatty acids, it may not be fungal acne safe. The Malassezia yeast feeds on chain lengths C11-24.
Fun fact: Canadian growers bred the low-erucic variety in the 1970's, and the name stands for "Canadian oil, Low Acid").
Learn more about Canola OilThis ingredient is also known as shea butter. It is a plant-derived extract from the nuts of the Africa shea tree and one of the most well-studied emollients.
Because it has a high concentration of fatty acids (primarily oleic, stearic, and linoleic) it is able to form a protective barrier on the skin's surface. This helps seal in moisture and prevents transepidermal water loss (TEWL).
In vitro research found an increase in skin hydration by 58% and a decrease in TEWL by 37.8% after 24 hours of applying this ingredient (pretty impressive for a single ingredient!).
Besides hydration, shea butter also contains triterpenes that have anti-inflammatory potential. In particule, lupeol cinnamate has shown the highest anti-inflammatory activity in vivo.
Shea butter also contains vitamins A and E which may contribute to antioxidant activity.
While Shea Butter has an SPF rating of about 3-4, it is not a sunscreen replacement.
This ingredient may not be fungal acne safe because its fatty acids fall within the C11-C24 range that the Malassezia yeast can metabolize.
Learn more about Butyrospermum Parkii ButterSodium PCA is the sodium salt of pyroglutamic acid. It is naturally occurring in our skin's natural moisturizing factors where it works to maintain hydration.
The PCA stands for pyrrolidone carboxylic acid, a natural amino acid derivative.
This ingredient has skin conditioning, anti-inflammatory, and humectant properties. Humectants help hydrate your skin by drawing moisture from the air. This helps keep your skin moisturized.
Learn more about Sodium PCAWe don't have a description for Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol yet.
Hydrolyzed Keratin is derived from keratin. Keratin is a large protein that is naturally found in our hair and skin.
Studies show keratin is able to seal broken hair cuticles, helping to prevent split ends and breakage.
As a humectant, hydrolyzed keratin helps draw moisture from the air to your hair and skin. This helps keep your skin and hair hydrated.
Learn more about Hydrolyzed KeratinYou may know this ingredient as argan oil. It has emollient and skin conditioning properties that help soften skin and reinforce the lipid barrier.
The fatty acid profile of argan oil is roughly 45-55% oleic acid, 28-36% linoleic acid, 10-15% palmitic acid, and 5-7% stearic acid. It also contains vitamin E, sterols, squalene, and polyphenols like ferulic acid.
Two clinical studies in postmenopausal women found that applying argan oil for 60 days significantly improved skin elasticity and moisturization (reduced transepidermal water loss and increased epidermal water content).
Since it is high in oleic and linoleic acid, this ingredient may not be fungal acne safe. Both of these fall in the C11-C24 range that Malassezia yeast can metabolize.
Learn more about Argania Spinosa Kernel OilWe don't have a description for Trideceth-12 yet.
This ingredient is a preservative, antimicrobial, and emulsifier. It is often used in cosmetics for its ability to cleanse, condition, and reduce static.
Cetrimonium chloride is a quaternary ammonium salt, meaning it has a water-soluble structure.
Methylchloroisothiazolinone, or MCI, is a synthetic preservative used to protect against the growth of bacteria, yeasts, and fungi in water-based products.
MCI is commonly combined with methylisothiazolinone (MI) in a 3:1 ratio.
This ingredient is safe in cosmetics when formulated to be non-sensitizing and concentrations must not exceed 7.5 ppm in leave-on products / 15 ppm in rinse-off products.
Unfortunately, this ingredient has a well-documented sensitization story. Studies spanning several decades have shown this ingredient + MI to cause skin irritation and allergies.
The use of this ingredient varies around the world:
This just means this ingredient is most likely non-sensitizing in rinse-off products unless you've been diagnosed with a contact allergy to isothiazolinones.
Learn more about MethylchloroisothiazolinoneMI is a preservative and known skin irritant. In the past, MI was used for its ability to prevent bacteria, yeast, and fungi growth in low doses.
Nowadays, you'll most likely see MI combined with Methylchloroisothiazolinone (MCI).
Since then, numerous studies have shown this ingredient to cause contact dermatitis, or skin irritation.
The use of this ingredient varies around the world:
Learn more about MethylisothiazolinoneCi 14700, also known as Red No. 4, is a synthetic red dye derived from petroleum. It is water soluble.
This ingredient, also known as Quinoline Yellow, is a water-soluble dye. It is a yellow/yellow-brown powder.
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Where it's from
One 'N Only is a American brand
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We're dedicated to providing you with the most up-to-date and science-backed ingredient info out there.
The data we've presented on this page has been verified by a member of the SkinSort Team.
Read more about us· Published January 2, 2025 • Added by BlackCat808