COSRX Oil-Free Ultra-Moisturizing Lotion With Birch Sap
COSRX

Oil-Free Ultra-Moisturizing Lotion With Birch Sap

It contains 70% Birch sap, a powerhouse ingredient for calming and treating sensitive, irritated, or freshly exfoliated skin. If you’ve ever experienced dryness due to acne medication, winter weather, or [more] [more] natural sensitivity, this is the cream for you. It quenches dry skin with zero greasy residue and calms acne-prone skin without causing breakouts. [less]
Uploaded by: josiahfraser on 31/10/2017

Ingredients overview

Betula Platyphylla Japonica Juice, Butylene Glycol
what‑it‑does moisturizer/humectant | solvent
irritancy, com. 0 1
An often used glycol that works as a solvent, humectant, penetration enhancer and also gives a good slip to the products. [more]
,
Dimethicone
what‑it‑does emollient
irritancy, com. 0 1
A very common silicone that gives both skin and hair a silky smooth feel. It also forms a protective barrier on the skin and fills in fine lines. Also used for scar treatment. [more]
,
Betaine
what‑it‑does moisturizer/humectant
A sugar beet derived amino acid derivative with nice skin protection and moisturization properties. Its special thing is being an osmolyte, a molecule that helps to control cell-water balance.  [more]
,
Cetearyl Alcohol
what‑it‑does emollient | emulsifying | viscosity controlling | surfactant/cleansing
irritancy, com. 1 2
A common multitasker ingredient that gives your skin a nice soft feel (emollient). It also helps water and oil to blend (emulsifier) and to thicken up products. [more]
,
1,2-Hexanediol
what‑it‑does solvent
A multi-functional helper ingredient that acts as a humectant and emollient. It's also a solvent and can boost the effectiveness of preservatives. [more]
,
Cetearyl Olivate
what‑it‑does emulsifying
An ester that comes from Cetearyl alcohol and the fatty acids of olive oil. It often comes to the formula coupled with Sorbitan Olivate and the two together help water and oil to blend (emulsifier). It's a natural and Ecocert approved duo.
,
Sorbitan Olivate
what‑it‑does emulsifying
An ester coming from sorbitol and the fatty acids of olive oil. It often comes to the formula coupled with Cetearyl Olivate and the two together help water and oil to blend (emulsifier). It's a natural and Ecocert approved duo.
,
Hydroxyethyl Acrylate/​Sodium Acryloyldimethyl Taurate Copolymer
what‑it‑does viscosity controlling
A helper ingredient that's good at stabilizing water-based formulas and also serves as a thickener. It's especially recommended for low pH products, like exfoliants.
, [more]
Sodium Lactate
what‑it‑does buffering | moisturizer/humectant
The sodium salt of lactic acid. It's a great skin moisturizer and also used to regulate the pH value of the cosmetic formula. [more]
,
Ethylhexylglycerin
what‑it‑does preservative
It can boost the effectiveness of phenoxyethanol (and other preservatives) and as an added bonus it feels nice on the skin too. [more]
,
Sodium Hyaluronate
what‑it‑does skin-identical ingredient | moisturizer/humectant
irritancy, com. 0 0
It's the salt form of famous humectant and natural moisturizing factor, hyaluronic acid. It can bind huge amounts of water and it's pretty much the current IT-moisturizer. [more]
,
Allantoin
what‑it‑does soothing
irritancy, com. 0 0
Super common soothing ingredient. It can be found naturally in the roots & leaves of the comfrey plant, but more often than not what's in the cosmetic products is produced synthetically. It's not only soothing but it' [more]
,
Panthenol
what‑it‑does soothing | moisturizer/humectant
irritancy, com. 0 0
Pro-Vitamin B5 is a goodie that moisturises the skin, has anti-inflammatory, skin protecting and wound healing properties. [more]
,
Xanthan Gum
what‑it‑does viscosity controlling
A super commonly used thickener and emulsion stabilizer. [more]
,
Ethyl Hexanediol
what‑it‑does solvent
A colorless, slightly viscous liquid that, similar to other glycols, is used as a solvent in cosmetic products. Its recommended concentration is less than 5%.  [more]
,
Citrus Medica Limonum (Lemon) Peel Oil, Melaleuca Alternifolia (Tea Tree) Leaf Oil
what‑it‑does soothing | anti-acne | antimicrobial/antibacterial
The famous tea tree oil. One of the best known essential oils which comes from Australia where it has been used for almost 100 years for its antiseptic and anti-inflammatory actions. [more]
[less]

Highlights

Key Ingredients

Anti-acne: Melaleuca Alternifolia (Tea Tree) Leaf Oil
what‑it‑does soothing | anti-acne | antimicrobial/antibacterial
The famous tea tree oil. One of the best known essential oils which comes from Australia where it has been used for almost 100 years for its antiseptic and anti-inflammatory actions. [more]
Skin-identical ingredient: Sodium Hyaluronate
what‑it‑does skin-identical ingredient | moisturizer/humectant
irritancy, com. 0 0
It's the salt form of famous humectant and natural moisturizing factor, hyaluronic acid. It can bind huge amounts of water and it's pretty much the current IT-moisturizer. [more]
Soothing: Allantoin
what‑it‑does soothing
irritancy, com. 0 0
Super common soothing ingredient. It can be found naturally in the roots & leaves of the comfrey plant, but more often than not what's in the cosmetic products is produced synthetically. It's not only soothing but it' [more]
,
Panthenol
what‑it‑does soothing | moisturizer/humectant
irritancy, com. 0 0
Pro-Vitamin B5 is a goodie that moisturises the skin, has anti-inflammatory, skin protecting and wound healing properties. [more]
,
Melaleuca Alternifolia (Tea Tree) Leaf Oil
what‑it‑does soothing | anti-acne | antimicrobial/antibacterial
The famous tea tree oil. One of the best known essential oils which comes from Australia where it has been used for almost 100 years for its antiseptic and anti-inflammatory actions. [more]

Show all ingredients by function

Other Ingredients

Antimicrobial/antibacterial: Melaleuca Alternifolia (Tea Tree) Leaf Oil
what‑it‑does soothing | anti-acne | antimicrobial/antibacterial
The famous tea tree oil. One of the best known essential oils which comes from Australia where it has been used for almost 100 years for its antiseptic and anti-inflammatory actions. [more]
Buffering: Sodium Lactate
what‑it‑does buffering | moisturizer/humectant
The sodium salt of lactic acid. It's a great skin moisturizer and also used to regulate the pH value of the cosmetic formula. [more]
Emollient: Dimethicone
what‑it‑does emollient
irritancy, com. 0 1
A very common silicone that gives both skin and hair a silky smooth feel. It also forms a protective barrier on the skin and fills in fine lines. Also used for scar treatment. [more]
,
Cetearyl Alcohol
what‑it‑does emollient | emulsifying | viscosity controlling | surfactant/cleansing
irritancy, com. 1 2
A common multitasker ingredient that gives your skin a nice soft feel (emollient). It also helps water and oil to blend (emulsifier) and to thicken up products. [more]
Emulsifying: Cetearyl Alcohol
what‑it‑does emollient | emulsifying | viscosity controlling | surfactant/cleansing
irritancy, com. 1 2
A common multitasker ingredient that gives your skin a nice soft feel (emollient). It also helps water and oil to blend (emulsifier) and to thicken up products. [more]
,
Cetearyl Olivate
what‑it‑does emulsifying
An ester that comes from Cetearyl alcohol and the fatty acids of olive oil. It often comes to the formula coupled with Sorbitan Olivate and the two together help water and oil to blend (emulsifier). It's a natural and Ecocert approved duo.
,
Sorbitan Olivate
what‑it‑does emulsifying
An ester coming from sorbitol and the fatty acids of olive oil. It often comes to the formula coupled with Cetearyl Olivate and the two together help water and oil to blend (emulsifier). It's a natural and Ecocert approved duo.
Moisturizer/humectant: Butylene Glycol
what‑it‑does moisturizer/humectant | solvent
irritancy, com. 0 1
An often used glycol that works as a solvent, humectant, penetration enhancer and also gives a good slip to the products. [more]
,
Betaine
what‑it‑does moisturizer/humectant
A sugar beet derived amino acid derivative with nice skin protection and moisturization properties. Its special thing is being an osmolyte, a molecule that helps to control cell-water balance.  [more]
,
Sodium Lactate
what‑it‑does buffering | moisturizer/humectant
The sodium salt of lactic acid. It's a great skin moisturizer and also used to regulate the pH value of the cosmetic formula. [more]
,
Sodium Hyaluronate
what‑it‑does skin-identical ingredient | moisturizer/humectant
irritancy, com. 0 0
It's the salt form of famous humectant and natural moisturizing factor, hyaluronic acid. It can bind huge amounts of water and it's pretty much the current IT-moisturizer. [more]
,
Panthenol
what‑it‑does soothing | moisturizer/humectant
irritancy, com. 0 0
Pro-Vitamin B5 is a goodie that moisturises the skin, has anti-inflammatory, skin protecting and wound healing properties. [more]
Preservative: Ethylhexylglycerin
what‑it‑does preservative
It can boost the effectiveness of phenoxyethanol (and other preservatives) and as an added bonus it feels nice on the skin too. [more]
Solvent: Butylene Glycol
what‑it‑does moisturizer/humectant | solvent
irritancy, com. 0 1
An often used glycol that works as a solvent, humectant, penetration enhancer and also gives a good slip to the products. [more]
,
1,2-Hexanediol
what‑it‑does solvent
A multi-functional helper ingredient that acts as a humectant and emollient. It's also a solvent and can boost the effectiveness of preservatives. [more]
,
Ethyl Hexanediol
what‑it‑does solvent
A colorless, slightly viscous liquid that, similar to other glycols, is used as a solvent in cosmetic products. Its recommended concentration is less than 5%.  [more]
Surfactant/cleansing: Cetearyl Alcohol
what‑it‑does emollient | emulsifying | viscosity controlling | surfactant/cleansing
irritancy, com. 1 2
A common multitasker ingredient that gives your skin a nice soft feel (emollient). It also helps water and oil to blend (emulsifier) and to thicken up products. [more]
Viscosity controlling: Cetearyl Alcohol
what‑it‑does emollient | emulsifying | viscosity controlling | surfactant/cleansing
irritancy, com. 1 2
A common multitasker ingredient that gives your skin a nice soft feel (emollient). It also helps water and oil to blend (emulsifier) and to thicken up products. [more]
,
Hydroxyethyl Acrylate/​Sodium Acryloyldimethyl Taurate Copolymer
what‑it‑does viscosity controlling
A helper ingredient that's good at stabilizing water-based formulas and also serves as a thickener. It's especially recommended for low pH products, like exfoliants.
,
Xanthan Gum
what‑it‑does viscosity controlling
A super commonly used thickener and emulsion stabilizer. [more]

Ingredients explained

We don't have description for this ingredient yet.

What-it-does: moisturizer/humectant, solvent | Irritancy: 0 | Comedogenicity: 1

Butylene glycol, or let’s just call it BG, is a multi-tasking colorless, syrupy liquid. It’s a great pick for creating a nice feeling product.  

BG’s main job is usually to be a solvent for the other ingredients. Other tasks include helping the product to absorb faster and deeper into the skin (penetration enhancer), making the product spread nicely over the skin (slip agent), and attracting water (humectant) into the skin.

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It’s an ingredient whose safety hasn’t been questioned so far by anyone (at least not that we know about). BG is approved by Ecocert and is also used enthusiastically in natural products. BTW, it’s also a food additive. 

What-it-does: emollient | Irritancy: 0 | Comedogenicity: 1

Probably the cheapest and most common silicone of all. It is a polymer (created from repeating subunits) molecule and has different molecular weight and thus different viscosity versions from water-light to thick liquid.

As for skincare, it makes the skin silky smooth, creates a subtle gloss and forms a protective barrier. Also, works well to fill in fine lines and wrinkles and give skin a plump look (of course that is only temporary, but still, it's nice). There are also scar treatment gels out there using dimethicone as their base ingredient. It helps to soften scars and increase their elasticity. 

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As for hair care, it is a non-volatile silicone meaning that it stays on the hair rather than evaporates from it and smoothes the hair like no other thing. Depending on your hair type, it can be a bit difficult to wash out and might cause some build-up (btw, this is not true to all silicones, only the non-volatile types). 

Betaine - goodie
What-it-does: moisturizer/humectant

A sugar beet derived amino acid derivative with nice skin protection and moisturization properties. Betain's special thing is being an osmolyte, a molecule that helps to control cell-water balance.  It is also a natural osmoprotectant, meaning that it attracts water away from the protein surface and thus protects them from denaturation and increases their thermodynamic stability. 

It also gives sensorial benefits to the formula and when used in cleansers, it helps to make them milder and gentler. 

What-it-does: emollient, emulsifying, viscosity controlling, surfactant/cleansing | Irritancy: 1 | Comedogenicity: 2

A super common multitasker ingredient that gives your skin a nice soft feel (emollient). It also helps water and oil to blend (emulsifier) and to thicken up products

It’s a so-called fatty alcohol (a mix of cetyl and stearyl alcohol - other two emollient fatty alcohols).  Though alcohol is in its name, its properties are totally different from the properties of “normal” alcohol, or denat. alcohol. It’s not drying and not irritating and totally ok for the skin.

What-it-does: solvent

A really multi-functional helper ingredient that can do several things in a skincare product: it can bring a soft and pleasant feel to the formula, it can act as a humectant and emollient, it can be a solvent for some other ingredients (for example it can help to stabilize perfumes in watery products) and it can also help to disperse pigments more evenly in makeup products. And that is still not all: it can also boost the antimicrobial activity of preservatives

What-it-does: emulsifying

An ester that comes from Cetearyl alcohol and the fatty acids of olive oil. It often comes to the formula coupled with Sorbitan Olivate and the two together help water and oil to blend (emulsifier). It's a natural and Ecocert approved duo.

What-it-does: emulsifying

An ester coming from sorbitol and the fatty acids of olive oil. It often comes to the formula coupled with Cetearyl Olivate and the two together help water and oil to blend (emulsifier). It's a natural and Ecocert approved duo.

This horribly long named thing is a helper ingredient that's good at stabilizing water-based formulas and also serves as a thickener. It's especially recommended for low pH products, like exfoliants.

Sodium Lactate - goodie

The sodium salt of lactic acid. It's a great skin moisturizer and also used to regulate the pH value of the cosmetic formula. It's a natural ingredient approved by both ECOCERT and COSMOS.

What-it-does: preservative

If you have spotted ethylhexylglycerin on the ingredient list, most probably you will see there also the current IT-preservative, phenoxyethanol. They are good friends because ethylhexylglycerin can boost the effectiveness of phenoxyethanol (and other preservatives) and as an added bonus it feels nice on the skin too.

Also, it's an effective deodorant and a medium spreading emollient

What-it-does: skin-identical ingredient, moisturizer/humectant | Irritancy: 0 | Comedogenicity: 0

It’s the - sodium form - cousin of the famous NMFhyaluronic acid (HA). If HA does not tell you anything we have a super detailed, geeky explanation about it here.  The TL; DR version of HA is that it's a huge polymer (big molecule from repeated subunits) found in the skin that acts as a sponge helping the skin to hold onto water, being plump and elastic. HA is famous for its crazy water holding capacity as it can bind up to 1000 times its own weight in water.

As far as skincare goes, sodium hyaluronate and hyaluronic acid are pretty much the same and the two names are used interchangeably. As cosmetic chemist kindofstephen writes on reddit  "sodium hyaluronate disassociates into hyaluronic acid molecule and a sodium atom in solution". 

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In spite of this, if you search for "hyaluronic acid vs sodium hyaluronate" you will find on multiple places that sodium hyaluronate is smaller and can penetrate the skin better. Chemically, this is definitely not true, as the two forms are almost the same, both are polymers and the subunits can be repeated in both forms as much as you like. (We also checked Prospector for sodium hyaluronate versions actually used in cosmetic products and found that the most common molecular weight was 1.5-1.8 million Da that absolutely counts as high molecular weight).

What seems to be a true difference, though, is that the salt form is more stable, easier to formulate and cheaper so it pops up more often on the ingredient lists. 

If you wanna become a real HA-and-the-skin expert you can read way more about the topic at hyaluronic acid (including penetration-questions, differences between high and low molecular weight versions and a bunch of references to scientific literature).

Allantoin - goodie
What-it-does: soothing | Irritancy: 0 | Comedogenicity: 0

Super common soothing ingredient. It can be found naturally in the roots & leaves of the comfrey plant, but more often than not what's in the cosmetic products is produced synthetically. 

It's not only soothing but it' also skin-softening and protecting and can promote wound healing.

Panthenol - goodie
Also-called: Pro-Vitamin B5 | What-it-does: soothing, moisturizer/humectant | Irritancy: 0 | Comedogenicity: 0

An easy-to-formulate, commonly used, nice to have ingredient that’s also called pro-vitamin B5. As you might guess from the “pro” part, it’s a precursor to vitamin B5 (whose fancy name is pantothenic acid). 

Its main job in skincare products is to moisturise the skin. It’s a humectant meaning that it can help the skin to attract water and then hold onto it. There is also research showing that panthenol can help our skin to produce more lovely lipids that are important for a strong and healthy skin barrier. 

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Another great thing about panthenol is that it has anti-inflammatory and skin protecting abilities. A study shows that it can reduce the irritation caused by less-nice other ingredients (e.g. fragrance, preservatives or chemical sunscreens) in the product.

Research also shows that it might be useful for wound healing as it promotes fibroblast (nice type of cells in our skin that produce skin-firming collagen) proliferation. 

If that wasn’t enough panthenol is also useful in nail and hair care products. A study shows that a nail treatment liquide with 2% panthenol could effectively get into the nail and significantly increase the hydration of it.

As for the hair the hydration effect is also true there. Panthenol might make your hair softer, more elastic and helps to comb your hair more easily. 

It's one of the most commonly used thickeners and emulsion stabilizers. If the product is too runny, a little of xanthan gum will make it more gel-like.  Used alone, it can make the formula sticky so it is usually combined with other thickeners and so-called rheology modifiers (helper ingredients that adjust the flow and thus the feel of the formula). 

Btw, Xanthan gum is all natural, a chain of sugar molecules (polysaccharide) produced from individual sugar molecules (glucose and sucrose) via fermentation. It’s approved by Ecocert and also used in the food industry (E415). 

What-it-does: solvent

A colorless, slightly viscous liquid that, similar to other glycols, is used as a solvent in cosmetic products. Its recommended concentration is less than 5%. 

We don't have description for this ingredient yet.

Also-called: Tea Tree Oil, TTO | What-it-does: soothing, anti-acne, antimicrobial/antibacterial

The famous tea tree oil. One of the best known essential oils which comes from Australia where it has been used for almost 100 years for its antiseptic and anti-inflammatory actions. Legend has it that the medicinal benefits of the oil were considered so important that Australian soldiers were supplied with some tea tree oil in their World War II military kit.

Similar to other essential oils, tea tree oil is a very complex chemical mixture consisting of about 100 components, the major ones being terpinen-4-ol (40%), γ-Terpinene (23%) and α-Terpinene (10%). Terpinen-4-ol is considered to be the main active component but as a great article in Clinical Microbiology Reviews states "while some TTO components may be considered less active, none can be considered inactive" and most components contribute to TTO's strong antibacterial, antiviral and antifungal effects

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Regarding skincare and tea tree oil, its most well-known effect is probably being a well established anti-acne ingredient. Multiple studies confirm that TTO is effective against the evil acne-causing bacteria called P. acnes and the effectiveness of 5% TTO gel is comparable to the gold standard anti-acne treatment, 5% Benzoyl Peroxide lotion. You need to be a bit more patient with TTO, though, as its effects come slower but also with fewer side effects.

Regarding TTO and sensitive skin, we say that you should be careful. Even if your skin is not sensitive you should never put undiluted TTO on your skin. Luckily, it contains only very small amounts of the common allergens (such as limonene), but irritant and allergic reactions still happen, especially by oxidation products that occur in older or not properly stored oil.  So if you have some pure TTO at home, know that storage matters, keep it in a cool, dry, dark place and use it up in a reasonable amount of time.

Overall, we do not often give a goodie status to essential oils, but we feel that TTO's unique antibacterial and anti-acne properties with its minimal allergen content warrant an exception. If your skin is acne-prone, TTO is something to experiment with.

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