Overview
What it is
Leave-in conditioner with 65 ingredients that contains exfoliants
Suited For
It has ingredients that are good for anti aging, dry skin, sensitive skin, oily skin, scar healing and dark spots
Free From
It doesn't contain any harsh alcohols, common allergens, parabens or sulfates
Fun facts
Masil is from South Korea.
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 ConditioningDipropylene Glycol
HumectantDimethicone
EmollientCyclopentasiloxane
EmollientC13-15 Alkane
SolventCetearyl Alcohol
Emollient1,2-Hexanediol
Skin ConditioningSclerocarya Birrea Seed Oil
HumectantPhenoxyethanol
PreservativeHydrolyzed Collagen Pg-Propyl Methylsilanediol
Skin ConditioningVitis Vinifera Fruit Extract
Skin ConditioningRoyal Jelly Extract
Skin ConditioningPersea Gratissima Fruit Extract
EmollientHippophae Rhamnoides Fruit Extract
Skin ConditioningSaccharum Officinarum Extract
MoisturisingMelaleuca Alternifolia Leaf Extract
PerfumingOlea Europaea Fruit Extract
BleachingDaucus Carota Sativa Root Extract
Skin ConditioningPrunus Mume Fruit Extract
HumectantHibiscus Sabdariffa Flower Extract
Skin ConditioningLuffa Cylindrica Fruit Extract
Skin ConditioningActinidia Chinensis Fruit Extract
EmollientMalus Domestica Fruit Extract
AntioxidantAdansonia Digitata Seed Extract
Skin ConditioningPropylene Glycol
HumectantHydrolyzed Collagen
EmollientBehentrimonium Chloride
PreservativeButylene Glycol
HumectantGlycerin
HumectantSynthetic Fluorphlogopite
Tin Oxide
AbrasiveTitanium Dioxide
Cosmetic ColorantArgania Spinosa Kernel Oil
EmollientVitis Vinifera Seed Oil
EmollientHydrolyzed Barley Protein
Skin ConditioningHydrolyzed Corn Protein
Skin ConditioningHydrolyzed Potato Protein
Skin ConditioningHydrolyzed Rice Protein
Skin ConditioningHydrolyzed Rice Bran Protein
Skin ConditioningHydrolyzed Soy Protein
HumectantHydrolyzed Oat Protein
Skin ConditioningHydrolyzed Pea Protein
EmollientHydrolyzed Wheat Protein
Skin ConditioningHydrolyzed Sweet Almond Protein
Skin ConditioningArginine
MaskingLeucine
Skin ConditioningTryptophan
MaskingLysine
Skin ConditioningIsoleucine
Skin ConditioningThreonine
Methionine
Skin ConditioningHistidine
HumectantAsparagine
MaskingAlanine
MaskingProline
Skin ConditioningGlutamic Acid
HumectantGlutamine
Skin ConditioningGlycine
BufferingValine
MaskingPhenylalanine
MaskingAspartic Acid
MaskingTyrosine
MaskingSerine
MaskingCystine
MaskingParfum
MaskingWater, Dipropylene Glycol, Dimethicone, Cyclopentasiloxane, C13-15 Alkane, Cetearyl Alcohol, 1,2-Hexanediol, Sclerocarya Birrea Seed Oil, Phenoxyethanol, Hydrolyzed Collagen Pg-Propyl Methylsilanediol, Vitis Vinifera Fruit Extract, Royal Jelly Extract, Persea Gratissima Fruit Extract, Hippophae Rhamnoides Fruit Extract, Saccharum Officinarum Extract, Melaleuca Alternifolia Leaf Extract, Olea Europaea Fruit Extract, Daucus Carota Sativa Root Extract, Prunus Mume Fruit Extract, Hibiscus Sabdariffa Flower Extract, Luffa Cylindrica Fruit Extract, Actinidia Chinensis Fruit Extract, Malus Domestica Fruit Extract, Adansonia Digitata Seed Extract, Propylene Glycol, Hydrolyzed Collagen, Behentrimonium Chloride, Butylene Glycol, Glycerin, Synthetic Fluorphlogopite, Tin Oxide, Titanium Dioxide, Argania Spinosa Kernel Oil, Vitis Vinifera Seed Oil, Hydrolyzed Barley Protein, Hydrolyzed Corn Protein, Hydrolyzed Potato Protein, Hydrolyzed Rice Protein, Hydrolyzed Rice Bran Protein, Hydrolyzed Soy Protein, Hydrolyzed Oat Protein, Hydrolyzed Pea Protein, Hydrolyzed Wheat Protein, Hydrolyzed Sweet Almond Protein, Arginine, Leucine, Tryptophan, Lysine, Isoleucine, Threonine, Methionine, Histidine, Asparagine, Alanine, Proline, Glutamic Acid, Glutamine, Glycine, Valine, Phenylalanine, Aspartic Acid, Tyrosine, Serine, Cystine, Parfum
Key Ingredients
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 WaterDipropylene Glycol is a synthetically created humectant, stabilizer, and solvent.
This ingredient helps:
Dipropylene glycol is technically an alcohol, but it belongs to the glycol family (often considered part of the āgoodā alcohols). This means it is hydrating and gentle on skin unlike drying solvent alcohols like denatured alcohol.
As a masking agent, Dipropylene Glycol can be used to cover the smell of other ingredients. However, it does not have a scent.
Studies show Dipropylene Glycol is considered safe to use in skincare.
Learn more about Dipropylene GlycolDimethicone is a type of synthetic silicone created from natural materials such as quartz. It is also known as polydimethylsiloxane.
What it does:
Dimethicone comes in different viscosities:
Depending on the viscosity, dimethicone has different properties.
Ingredients lists don't always show which type is used, so we recommend reaching out to the brand if you have questions about the viscosity.
This ingredient is unlikely to cause irritation because it does not get absorbed into skin. However, people with silicone allergies should be careful about using this ingredient.
Note: Dimethicone may contribute to pilling. This is because it is not oil or water soluble, so pilling may occur when layered with products. When mixed with heavy oils in a formula, the outcome is also quite greasy.
Learn more about DimethiconeCyclopentasiloxane, or D5, is a silicone used to improve texture of products and trap moisture.
D5 is considered lightweight and volatile. Volatile means it evaporates quickly after application. Once evaporated, D5 leaves a thin barrier that helps keep skin hydrated.
It is also an emollient. Emollients help soften the skin and prevent water loss. Silicones create a silky texture in products. D5 helps other ingredients become more spreadable.
Studies show D5 is safe to use in skincare products. We recommend speaking with a skincare professional if you have concerns.
Learn more about CyclopentasiloxaneC13-15 Alkane is a group of alkanes with 13 to 15 carbon atoms in the alkyl chain.
It is a solvent and texture enhancer. 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.
Cetearyl 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 Alcohol1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.Ā
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservativesĀ
Sclerocarya Birrea Seed Oil (aka marula oil) is a skin hydrating ingredient.
Its fatty acid profile is dominated by oleic acid (~69%), palmitic acid (~15%), linoleic acid (~9%), and palmitoleic acid (~4%).
These fatty acids are very similar to those naturally found in the epidermis, making this oil biomimetic; basically, your skin recognizes it.
Clinical testing found this ingredient to be moisturizing and non-irritating, with noteworthy effects on reducing transepidermal water loss (TEWL).
Besides fatty acids, marula oil is also rich in oxidative stabilizers like vitamin E, vitamin C precursors, and polyphenols. This gives it excellent shelf stability compared to most facial oils.
This is a great ingredient for dry, dull, or barrier-compromised skin.
Just know it may not be fungal acne safe due to the oleic and palmitic acid content. These fatty acids can as as a food source for the Malassezia yeast.
Learn more about Sclerocarya Birrea Seed OilPhenoxyethanol 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.
Hydrolyzed Collagen Pg-Propyl Methylsilanediol can help to reduce the effects of aging.
Vitis Vinifera Fruit Extract comes from grapes.
Grape extract has many skin benefits. It also contains many potent antioxidants such as Vitamin E , Vitamin C, proanthocyanidins, polyphenols, flavonoids, and anthocyanins. Antioxidants help protect skin. Proanthocyanidin have also been shown to help even out skin tone.
Grape extract also helps soothe and hydrate your skin.
Learn more about Vitis Vinifera Fruit ExtractRoyal Jelly Extract comes from a secretion made by worker honeybees. This secretion is white and described as creamy.
This compound has antibacterial, anti-aging, and anti-inflammatory properties.
Studies show Royal Jelly to contain amino acids, fatty acids, and a variety of vitamins, including Vitamin Bs. Many of these components are antioxidants, which help with anti-aging. The fatty acids in Royal Jelly make it a hydrating ingredient.
Several animal studies show Royal Jelly to boost collagen production and reduce inflammation.
The Vitamin Bs found in Royal Jelly include:
Royal Jelly is derived from honeybees. This means it is not vegan.
Learn more about Royal Jelly ExtractPersea Gratissima Fruit Extract comes from the avocado.
Avocados are rich in fatty acids. About 67% of these fatty acids is made up of oleic acid. Palmitic acid and linoleic acid are also present.
Besides fatty acids, avocados also have B vitamins, vitamin K, vitamin C, vitamin E, and potassium.
Learn more about Persea Gratissima Fruit ExtractHippophae Rhamnoides Fruit Extract comes from the seabuckthorn berry. This berry is native to Asia and has been used in traditional medicine for centuries.
The seabuckthorn fruit contains carotenoids, palmitic acid, palmitoleic acid, Vitamin C, linoleic acid, and vitamin E.
The nutritious content of seabuckthorn fruit helps hydrate and nourish the skin. A study from 2018 found seabuckthorn may help with alleviating UV damage due to its anti-inflammatory property. However, it should not replace your sunscreen.
Due to its antioxidant properties, seabuckthorn fruit may help reduce the signs of aging. Antioxidants help fight unstable free-radical molecules, or molecules that may damage your skin cells.
Learn more about Hippophae Rhamnoides Fruit ExtractThis ingredient is also called sugarcane extract. It is a moisturizing humectant and has skin soothing properties.
Similar to hyaluronic acid, sugarcane can attract moisture to your skin.
Glycolic acid is a derivative of sugarcane. While glycolic acid is an AHA with exfoliating properties, sugarcane is not an AHA.
A study from 2021 found the compounds in sugarcane extract to have antioxidant, antimicrobial, and anti-inflammatory activity. The study also suggests these compounds can inhibit skin ageing enzymes and promote collagen synthesis.
Learn more about Saccharum Officinarum ExtractMelaleuca Alternifolia Leaf Extract comes from the Tea Tree, Melaleuca alternifolia, Myrtaceae. This tea tree is native to Australia.
Tea Leaf extract contains antimicrobial and anti-acne properties.
This ingredient has perfuming properties and contains linalool and limonene. These fragrance and terpinen components can cause skin sensitivity.
Learn more about the benefits of Tea Tree Oil here.
Learn more about Melaleuca Alternifolia Leaf ExtractOlea Europaea Fruit Extract is extract from the olive fruit. Olive fruit contains hydrating ingredients such as squalene and fatty acids.
It contains the fatty acids linoleic acid, oleic and palmitic acid.
Due to this fatty acid content, this ingredient may not be fungal-acne safe.
Learn more about Olea Europaea Fruit ExtractDaucus Carota Sativa Root Extract comes from the root commonly known as carrot (the orange kind we eat!).
This extract contains beta-carotene, a pigment responsible for giving plants the orange color. Beta-carotene is a potent antioxidant. Antioxidants may help reduce the signs of aging.
Beta-carotene is the reason we turn orange if we eat too many carrots.
It should be noted coming into contact with the leaves of wild carrots can cause skin irritation. The sap causes phytophotodermatitis, or sensitivity exposed to sunlight.
This ingredient is created using the edible parts of the carrot.
Learn more about Daucus Carota Sativa Root ExtractPrunus Mume extract comes from the Asian plum. This plum is AKA 'plum blossom'. Plum blossom has hydrating and antibacterial properties.
Plum Blossoms are rich in nutrients, including Vitamin A, Vitamin B, and Vitamin C.
A study from 2021 found this ingredient to inhibit melanin production. An animal study found plum blossom to help increase collagen production.
Learn more about Prunus Mume Fruit ExtractThis extract comes from the Roselle flower, or Hibiscus Sabdariffa. Roselle flowers are rich in antioxidants.
Studies found the antioxidants in Roselle flowers to potentially help reduce UV-B damage.
We don't have a description for Luffa Cylindrica Fruit Extract yet.
Actinidia Chinensis is the extract from kiwi fruit. It contains antioxidants in the forms of Vitamin C and polyphenols.
Antioxidants help protect your skin against free-radicals. Free-radicals are molecules that may damage your skin.
This ingredient comes from apples. It has antioxidant, moisturizing, and skin soothing benefits.
Baobab seeds are rich in vitamins A, E, and D, giving it nice antioxidant properties.
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.
Learn more about Propylene GlycolHydrolyzed collagen has a misleading name because it is actually a mixture of various proteins/peptides. This ingredient has skin hydrating properties.
Collagen is the most abundant type of structural protein found in your body. In your skin, it is responsible for keeping it firm and youthful.
Hydrolyzed Collagen is created by breaking up proteins into smaller peptide bonds. These peptides act as humectants and emollients.
Humectants are great at holding onto water, keeping skin hydrated. Emollients create a thin barrier on the skin to prevent moisture from escaping.
There is ongoing debate about whether hydrolyzed collagen works because it increases skin hydration. Skin hydration is also linked to elasticity and the appearance of wrinkles.
Collagen or peptide ingredients can be used in the morning or night. They will not increase sun sensitivity, but you should always wear sunscreen during the day.
According to a manufacturer, this ingredient is a great hair conditioner as well.
This ingredient can be extracted from different sources, including:
Vegan collagen is derived from yeast, bacteria, or plant sources. Vegan collagen would go by a different INCI name, such as hydrolyzed soy protein.
The results are varied.
A study from 2021 found hydrolyzed collagen increased elasticity and improved wrinkles in 1,125 participants between age 20 and 70. Another study found increased skin thickness in participants between the ages of 45 to 59.
However, It is difficult to prove that oral collagen will end up working on your skin. Many of the studies using hydrolyzed collagen also add several vitamins and nutrients into the test mixture as well.
Further studies are needed at this time.
Learn more about Hydrolyzed CollagenThis ingredient is a preservative and often used for it's anti-static properties. You'll most likely see this ingredient in hair conditioners.
It does not cause irritation or sensitization in leave-on products at 1-5%.
Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.
Learn more about Butylene GlycolGlycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
Topically, glycerin does several things at once:
Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.
Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.
This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.
Just know very high concentrations (>40%) can feel tacky in low humidity.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinSynthetic Fluorphlogopite is the synthethic version of mica. It consists of fluorine, aluminum and silicate.
Synthetic Fluorphlogopite is used to add volume to products.
It is considered non-irritating on the skin.
Learn more about Synthetic FluorphlogopiteTin Oxide is an inorganic oxide used to add opacity and volume to a product. In nature, it is already found in mineral form. The main ore of tin is an opaque and shiny mineral called casseterite.
Tin Oxide helps remove translucency in a product, or make it more opaque. Besides adding opacity, tin oxide is used for bulking to add volume.
Titanium dioxide is a mineral UV filter widely used in sunscreens and cosmetics.
It is one of only two UV filters officially classified as āmineralā by regulatory agencies, the other being zinc oxide.
Titanium dioxide provides broad-spectrum protection mostly in the UVB and UVAII range, with some protection in the UVAI range.
While its UVA protection isnāt as strong as zinc oxideās, the difference is minor.
A common myth is that mineral UV filters reflect UV light. However, modern research shows titanium dioxide absorbs UV radiation like chemical filters (~95% absorption & 5% reflection).
Thanks to its non-irritating nature, titanium dioxide is suitable for sensitive, acne-prone, or redness-prone skin. It is unlikely to cause "eye sting" like other sunscreen ingredients.
A major drawback of this ingredient is its white cast and thick texture. This is why mineral sunscreens often leave a white cast and are less cosmetically elegant than chemical/hybrid sunscreens.
To improve white cast and spreadability, micronized or nano-sized titanium dioxide is often used.
There are ongoing concerns surrounding nano-titanium oxide's impact on marine ecosystems.
There is no conclusive evidence that any form of titanium oxide (or any other sunscreen ingredients) will cause harm to marine ecosystems or coral reefs. The science is still developing but many consumers are keeping a close eye on this issue.
Please note, many destinations have reef-safety sunscreen rules. For instance, the U.S. Virgin Islands advises all visitors to use non-nano mineral sunscreens.
Nano mineral sunscreens once raised safety concerns about absorption into skin.
Extensive research has shown that they do not penetrate healthy or damaged skin; they remain safely on the surface and the top layer of dead skin (stratum corneum).
You'll likely find titanium dioxide bundled with alumina, silica, or dimethicone. These ingredients help make titanium dioxide highly photostable; this prevents it from interacting with other formula components under UV light.
Learn more about Titanium DioxideYou 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 OilVitis Vinifera Seed Oil comes from the grape vine. Grape seeds are a byproduct of creating grape juice or wine.
The components of grape seeds have many skin benefits. Research has found it to be antimicrobial and anti-inflammatory. It also contains many potent antioxidants such as Vitamin E , Vitamin C, proanthocyanidins, polyphenols, flavonoids, and anthocyanins. Proanthocyanidin has been shown to help even out skin tone.
Antioxidants help fight free-radical molecules. Free-radical molecules are capable of damaging our cells and other genetic material. Antioxidants help stabilize free-radicals by donating extra electrons. Grape seed extract may help reduce the signs of aging.
The antimicrobial properties of grape seed may help treat acne. However, more research is needed to support this claim.
Grape seed has also been found to help absorb UV rays. Grape seed extract should not replace your sunscreen.
The fatty acids of grape seed oil give it emollient properties. Emollients help soothe and soften your skin by creating a film. This film traps moisture within, keeping your skin hydrated.
Learn more about Vitis Vinifera Seed OilWe don't have a description for Hydrolyzed Barley Protein yet.
We don't have a description for Hydrolyzed Corn Protein yet.
We don't have a description for Hydrolyzed Potato Protein yet.
Hydrolyzed Rice Protein is protein extracted from rice. This ingredient is rich in antioxidants and peptides.
Studies show this ingredient may help with blocking the melanin creation process when skin is exposed to UV.
We don't have a description for Hydrolyzed Rice Bran Protein yet.
Hydrolyzed Soy Protein is a vegan protein made to mimic hydrolyzed collagen. It is created from soy, or glycine soja.
This ingredient is a humectant, meaning it helps hydrate the skin by binding to water. According to a manufacturer, it is also a great hair conditioner.
Read more about hydrolyzed collagen here.
Learn more about Hydrolyzed Soy ProteinWe don't have a description for Hydrolyzed Oat Protein yet.
Hydrolyzed pea protein has skin conditioning and emollient properties. It is created by cutting protein fragments (peptides) into smaller pieces.
According to a manufacturer, this size of this ingredient makes it easy to be absorbed into skin where they strengthen the skin barrier, improve moisture retention, and improve signs of irritation.
One study that included pea proteins in a topical product reported improved atopic dermatitis symptom scores while a patent containing this ingredient suggests this ingredient to support hydration-related pathways in the skin.
Learn more about Hydrolyzed Pea ProteinThis 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.
We don't have a description for Hydrolyzed Sweet Almond Protein yet.
Arginine is a semi-essential amino acid. This just means our bodies can product a bit on its own, but sometimes needs a little boost from food sources.
It is a part of your skin's natural moisturizing factor (NMF), or the water-loving molecules in your outermost layer of skin (stratum corneum) that keeps everything hydrated and happy.
Here's an interesting thing about Arginine: your skin converts it into urea through the Krebs-Henseleit urea cycle. Urea is one of the most effective humectants your skin naturally produces.
A clinical study showed applying 2.5% arginine hydrochloride to atopic dermatitis skin showed significant urea levels in the stratum corneum and improved moisture in just four weeks.
Arginine is also a precursor to nitric oxide; nitric oxide improves microcirculation and supports wound healing and collagen synthesis.
One study found that an amino acid complex containing Arginine reduced skin irritation, improved hydration, and accelerated skin repair in clinical / in-vivo studies.
Arginine itself is an amino acid and not a fatty acid, oil, or ester. On its own, it's not a direct food source for Malassezia, or the yeast that causes fungal acne.
Learn more about ArginineWe don't have a description for Leucine yet.
We don't have a description for Tryptophan yet.
Lysine is an essential amino acid (your body cannot make it on its own). It has skin conditioning properties and one of the key players in collagen synthesis.
When your body creates collagen, lysine is basically the glue that holds everything together. It helps collagen fibers lock into each other and stay strong, with vitamin C being its trusty sidekick. Without enough lysine, this glue gets flimsy and less firm, resulting in less bouncy skin.
In skincare, lysine is mostly there to help keep your skin moisturized. It carries water through your skin's layers so everything stays plump.
So will putting lysine on your face create bouncier skin?
It's hard to say; most of the exciting collagen research on lysine comes from oral supplements or lab studies on mice. Further research is needed to truly understand what role topical lysine plays in skincare and your skin.
However, there's no harm in adding lysine to your routine as a supportive and hydrating ingredient.
Learn more about LysineIsoleucine is an amino acid that helps reinforce our skin barrier. This amino acid plays a role in creating protein for the body.
Fun fact: Isoleucine is found in meat, fish, dairy, legumes, and nuts.
Threonine is an amino-acid. It helps hydrate the skin and has antioxidant benefits.
Our skin uses threonine for creating collagen and elastin. Humans are not able to create threonine and must get it through eating foods such as fish, lentils, poultry, sesame seeds, and more.
Methionine is an essential amino acid. It is a conditioning agent and commonly found in both skin and hair products.
This amino acid is a precursor to glutathione, a powerful antioxidant.
Fun fact: Methionine can be found in meat, fish, and dairy. It cannot be naturally produce and requires dietary intake.
Learn more about MethionineHistidine is a semi-essential amino acid used by our bodies to create protein. It has humectant and skin conditioning properties.
Our bodies use histidine to create filaggrin - filaggrin is a structural protein that the skin uses in maintaining skin barrier.
One study found histidine and carnosine to be a dynamic duo for your skin:
Oral histidine has also been found to help with filaggrin-deficit skin disorders such as atopic dermatitis.
Why is it considered a semi-essential amino acid? This is because adults are able to create it but children must get it from their diet.
Learn more about HistidineAsparagine is one building block of all proteins in our body. It is an antioxidant and may help with anti-aging.
Antioxidants help fight free-radicals, or molecules that may damage our skin cells.
Alanine is an amino acid and is already found in the human body. Our skin uses alanine to build collagen, elastin, and keratin.
Proline is a non-essential amino acid, meaning your body can make it on its own. In skincare, it is a skin conditioning ingredient that keeps skin soft and hydrated.
It makes up about 23% of the collagen molecule (collagen is the protein responsible for keeping your skin firm) and is involved in your skin's natural hyaluronic acid production. When applied topically, proline can penetrate the skin fairly well due to its small molecular size.
Reviews of this ingredient have found it to be neither a dermal irritant nor a sensitizer.
Fun fact: Proline can be found in protein-rich foods like meat, fish, eggs, and dairy.
Learn more about ProlineGlutamic Acid is an amino acid that is found in all living organisms. Our bodies use this to help nerve cells in the brain communicate with other cells.
In cosmetics, glutamic acid is a famous humectant. It draws water from the air to your skin, keeping your skin hydrated (like hyaluronic acid).
An in-vitro study from 2024 found glutamic acid to play a role in inhibiting inflammation and thus a potential skin-soothing ingredient.
Other studies show it to be have potential wound healing, skin barrier repair, and hair growth properties.
Glutamic acid has poor solubility in water and other solvents.
Learn more about Glutamic AcidGlutamine is an amino acid (a small building block your body uses to make proteins). It has skin conditioning properties and helps skin feel comfortable.
Think of glutamine as a quiet support player in your skincare. Your skinās outer layer (stratum corneum) needs two things to stay healthy: a strong barrier and enough moisture.
Part of what helps hold water in the skin is something called Natural Moisturizing Factors (NMF). These include amino acids or the same building blocks that make up proteins in your body.
Since glutamine is an amino acid, it falls into the ābarrier-friendly, skin-conditioningā category. Thatās why youāll usually find it in hydrating and soothing formulas.
There's some experimental evidence that glutamine can calm inflammation-related skin reactions when applied topically in a contact-dermatitis model. However, it's not the same as a proven eczema fix.
Learn more about GlutamineGlycine is the smallest amino acid and a key building block of collagen. It's part if your skin's Natural Moisturizing Factor (NMF), or the water-loving molecules in your outermost layer of skin (stratum corneum) that keeps everything hydrated and happy.
A study from 2022 found that an amino acid complex featuring taurine, arginine, and glycine significantly reduced skin irritation, improved redness, and accelerated the skin repair process.
Valine is an essential amino acid. It is used by our bodies for tissue repair and muscle growth.
An essential amino acid is one in which our bodies cannot naturally produce so we must get them through diet. Foods such as eggs, dairy, red meat, and fish contain valine.
This ingredient can either be derived from an animal product or be synthetically created.
Learn more about ValinePhenylalanine is an amino acid. It is a skin soothing and hydrating ingredient. Amino acids play a crucial role in wound healing and skin hydration.
This ingredient is also used to help even out skin tone due to its ability to disrupt the melanin production process.
Two structures of phenylalanine exist: L-phenylalanine and D-phenylalanine. L-phenylalanine is essential, this means our bodies cannot produce it naturally and we must get it from foods. Our bodies convert D-phenylalanine to neurotransmitters, and D-phenylalanine is found in our bodies naturally.
Some foods that contain L-phenylalanine include eggs, soybeans, beef, milk.
Learn more about PhenylalanineAspartic Acid is an amino acid that our bodies produce naturally. It is an antioxidant.
Our body uses Aspartic Acid to help build collagen and elastin. It also plays a role in hydrating skin.
Tyrosine is one of the amino acids used to create protein. It plays a role in melanin production.
A study from 2012 found tyrosine to show promising results in restoring skin volume.
Serine is a non-essential amino acid (your body makes it on its own!). It is a major player in your skin's natural moisturizing factor (NMF), or the water-loving molecules in your outermost layer of skin (stratum corneum) that keeps everything hydrated and happy.
Serine is one of your NMF's most abundant components that works as a skin-identical humectant. Its hydroxyl group grabs onto water molecules to boost hydration without any heaviness or occlusion.
Research on a hydrogel with serine confirmed this serine got delivered to your stratum corneum and demonstrated enhanced skin moisturization.
Interestingly serine also helps your skin produce filaggrin, a protein that keeps your skin barrier strong and used to create collagen.
Learn more about SerineWe don't have a description for Cystine yet.
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 āFRAGRANCEā or āPARFUMā 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 ParfumReviews
No written reviews yet. Be the first to review this product.
Recent searches
Search reviews by skin type, ingredient, or keyword.
Where it's from
Masil is a Korean brand
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 usĀ· Updated April 13, 2026 • Added by yuyanloong