Water(Aqua/Eau)
Also-called: Aqua | What-it-does: solvent
Good old water, aka H2O. The most common skincare ingredient of all. You can usually find it right in the very first spot of the ingredient list, meaning it’s the biggest thing out of all the stuff that makes up the product.
It’s mainly a solvent for ingredients that do not like to dissolve in oils but rather in water.
Once inside the skin, it hydrates, but not from the outside - putting pure water on the skin (hello long baths!) is drying.
One more thing: the water used in cosmetics is purified and deionized (it means that almost all of the mineral ions inside it is removed). Like this, the products can stay more stable over time.
Glycerin - superstar
Also-called: Glycerol | What-it-does: skin-identical ingredient, moisturizer/humectant | Irritancy: 0 | Comedogenicity: 0
- A natural moisturizer that’s also in our skin
- A super common, safe, effective and cheap molecule used for more than 50 years
- Not only a simple moisturizer but knows much more: keeps the skin lipids between our skin cells in a healthy (liquid crystal) state, protects against irritation, helps to restore barrier
- Effective from as low as 3% with even more benefits for dry skin at higher concentrations up to 20-40%
- High-glycerin moisturizers are awesome for treating severely dry skin
Read all the geeky details about Glycerin here >>
Dipropylene Glycol
What-it-does: solvent
A clear, colorless liquid that works as a solvent and viscositydecreasing ingredient. It also has great skin-moisturizing abilities.
Betaine - goodie
What-it-does: moisturizer/humectant
A sugar beet-derivedamino acid derivative with nice skin protection and moisturization properties. Betaine'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 thusprotects them from denaturation and increases their thermodynamic stability.
It also gives sensorial benefits to the formulaand when used in cleansers, it helps to make them milder and gentler.
Dimethicone
What-it-does: emollient | Irritancy: 0 | Comedogenicity: 1
Probably themost 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 thickliquid.
As for skincare, it makes the skin silky smooth, creates a subtle gloss and forms a protective barrier (aka occlusive). 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'snice). There are also scar treatment gels out there using dimethicone as their base ingredient. It helps to soften scars and increase their elasticity.
As for hair care, it is a non-volatile silicone meaning that it stays on the hair rather than evaporates from it andsmoothes the hairlike no other thing. Depending on your hair type, it can bea bit difficult to wash out and might cause some build-up (btw, this is not true to all silicones, only the non-volatile types).
Cetyl Ethylhexanoate
What-it-does: emollient
An odorless and colorless emollient ester (cetylalcohol + ethylhexanoicacid) that gives a velvety and silky feel to the skin. It has great spreadability and a non-oily feel. It's a popular ingredient in makeup removers.
PEG-20
What-it-does: moisturizer/humectant, solvent
We don't have description for this ingredient yet.
Potassium Methoxysalicylate
What-it-does: skin brightening
We don't have description for this ingredient yet.
Piperidinepropionic Acid
We don't have description for this ingredient yet.
Erythritol
What-it-does: moisturizer/humectant
We don't have description for this ingredient yet.
PEG/PPG-14/7 Dimethyl Ether
We don't have description for this ingredient yet.
PEG/PPG-17/4 Dimethyl Ether
We don't have description for this ingredient yet.
Tocopheryl Acetate
Also-called: Vitamin E Acetate | What-it-does: antioxidant | Irritancy: 0 | Comedogenicity: 0
It’s the most commonly used version of pure vitamin E in cosmetics. You can read all about the pure form here. This one is the so-called esterified version.
According to famous dermatologist, Leslie Baumann while tocopheryl acetate is more stable and has a longer shelf life, it’s also more poorly absorbed by the skin and may not have the same awesome photoprotective effects as pure Vit E.
Phytosteryl/Octyldodecyl Lauroyl Glutamate - goodie
What-it-does: emollient
An amino-acid (glutamic acid) derived molecule that is claimed to form lamellar liquid crystals similar to the ones formed in the skin between skin cells (called lipid bilayer). The lipid bilayer is like the "mortar" between our skin cells ("the bricks") and is super important for a healthy skin barrier and keeping water in the upper layers of the skin.
So Phytosteryl/Octyldodecyl Lauroyl Glutamate is askin-lipid-like material that makes your skin nice and smooth (emollient) and keepsyour skin hydrated. According to the manufacturer's tests, it is more effective than petrolatum in promoting the recovery of damaged skin andimproving rough skin conditions.
Lauryl Betaine
What-it-does: surfactant/cleansing, surfactant/cleansing
We don't have description for this ingredient yet.
2-O-Ethyl Ascorbic Acid
We don't have description for this ingredient yet.
Xanthan Gum
What-it-does: viscosity controlling, emulsion stabilising
It's one of the most commonly used thickeners and emulsion stabilizers. If the product is too runny, a little xanthan gum will make it more gel-like.Used alone, it can make the formula sticky and it is a good team player so it is usually combined with other thickeners and so-calledrheology modifiers (helper ingredients that adjust the flow and thus the feel of the formula). The typical use level of Xantha Gum is below 1%, it is usually in the 0.1-0.5% range.
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).
Prunus Speciosa Leaf Extract
We don't have description for this ingredient yet.
Angelica Acutiloba Root Extract
We don't have description for this ingredient yet.
Chaenomeles Sinensis Fruit Extract
What-it-does: antioxidant, astringent, emollient, moisturizer/humectant
We don't have description for this ingredient yet.
Camellia Sinensis Leaf Extract - goodie
Also-called: Green Tea | What-it-does: antioxidant, soothing
- Green tea is one of the most researched natural ingredients
- The active parts are called polyphenols, or more precisely catechins (EGCG being the most abundant and most active catechin)
- There can be huge quality differences between green tea extracts. The good ones contain 50-90% catechins (and often make the product brown and give it a distinctive smell)
- Green tea is proven to be a great antioxidant, UV protectant, anti-inflammatory, anticarcinogenic and antimicrobial
- Because of these awesome properties green tea is a great choice for anti-aging and also for skin diseases including rosacea, acne and atopic dermatitis
Read all the geeky details about Camellia Sinensis Leaf Extract here >>
Isodonis Japonicus Leaf/Stalk Extract
We don't have description for this ingredient yet.
Rosa Multiflora Fruit Extract
We don't have description for this ingredient yet.
Bupleurum Falcatum Root Extract
We don't have description for this ingredient yet.
Prunus Persica (Peach) Leaf Extract
What-it-does: emollient, moisturizer/humectant
We don't have description for this ingredient yet.
Hydrolyzed Silk
What-it-does: moisturizer/humectant
We don't have description for this ingredient yet.
Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
What-it-does: viscosity controlling, emulsion stabilising
A copolymer is a big molecule that consists not of one but of two repeating subunits. This particular copolymer is a handy helper ingredient to form nice gel textures.
It usually comes to the formula combined with emollients (such as C13-14 Isoparaffin, Isohexadecane, Isononyl Isononanoate or Squalane) and can be used as anemulsifier and/or thickener to produce milky gel emulsions with a soft and non-tacky skin feel.
Carbomer
What-it-does: viscosity controlling, emulsion stabilising | Irritancy: 0 | Comedogenicity: 1
A big molecule created from repeated subunits (a polymer of acrylic acid) that magically converts a liquidinto a nice gel formula. It usually has to be neutralized with a base (such as sodium hydroxide) for the thickening to occur and it creates viscous, clear gels that also feel nice and non-tacky on the skin. No wonder, it is a very popular and common ingredient. Typically used at 1% or less in most formulations.
Butylene Glycol
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.
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.
Isostearic Acid
What-it-does: surfactant/cleansing, emulsifying
A liquid fatty acidcreated from oleic acid. It's claimed to have great odour, thermal and oxidation stability and is great for the stabilization of pigments and mineral particles in oils and solvents. It's quite popular in foundations.
Isohexadecane
What-it-does: emollient, solvent
A light, velvety, unique skin feel liquid that is a good solvent and also makes the skin feel nice and smooth (aka emollient). It's often used in makeup products mixed with silicones to give shine and slip to the product. It's also great forcleansing dirt and oil from the skin as well as for taking off make-up.
PEG-60 Glyceryl Isostearate
What-it-does: surfactant/cleansing
We don't have description for this ingredient yet.
Potassium Hydroxide
What-it-does: buffering
It's a very alkaline stuff that helps to set the pH of the cosmetic formula to be just right. It's similar to the more often used sodium hydroxideand pretty much the same of what we wrote there applies here too.
Alcohol - icky
Also-called: Ethanol | What-it-does: antimicrobial/antibacterial, solvent, viscosity controlling, astringent
Simply alcohol refers to ethanol and it's a pretty controversial ingredient. It has many instant benefits: it's a great solvent, penetration enhancer, creates cosmetically elegant, light formulas, great astringent and antimicrobial. No wonder it's popular in toners and oily skin formulas.
The downside is that it can be very drying if it's in the first few ingredients on an ingredient list.
Some experts even think that regular exposure to alcohol damages skin barrier and causes inflammation though it's a debated opinion. If you wanna know more, we wrote a more detailed explanation about what's the deal with alcohol in skincare products at alcohol denat.(it's also alcohol, but with some additives to make sure no one drinks it).
PEG-10 Dimethicone
What-it-does: emulsifying
A silicone emulsifier that helps water and silicone oils to mix nicely together. It can also be used together with plant oil + silicone oil mixtures.
Polysorbate 80
What-it-does: emulsifying, surfactant/cleansing | Irritancy: 0 | Comedogenicity: 0
A common little helper ingredient thathelps water and oil to mixtogether, aka emulsifier.
The number at the end refers to the oil-loving part and the bigger the number the more emulsifying power it has. 20 is a weak emulsifier, rather called solubilizer used commonly in toners while 60 and 80 are more common in serums and creams.
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
What-it-does: viscosity controlling, emulsion stabilising
Though its long name does not reveal it, this polymer molecule (big molecule from repeated subunits or monomers) is a relative to the super common, water-loving thickener, Carbomer. Both of them are big molecules that contain acrylic acid units, butAcrylates/C10-30 Alkyl Acrylate Crosspolymer also contains some other monomers that are hydrophobic, i.e. water-hating.
This means that our molecule is part water- and part oil-loving, so it not only works as a thickener but also as an emulsion stabilizer. It is very common in gel-type formulas that also contain an oil-phase as well as in cleansers as it also works with most cleansing agents (unlike a lot of other thickeners).
Sorbitan Oleate
What-it-does: emulsifying | Irritancy: 0 | Comedogenicity: 3
A mainly oil-loving, vegetable raw material based ingredient that helps water and oil to mix together, aka emulsifier. It can also function as a wetting and dispersing agent helping insoluble particles such as color pigments or inorganic sunscreens (zinc/titanium dioxide) to disperse nice and even in liquids.
Chemically speaking, it comes from the attachment of sorbitan (a dehydrated sorbitol (sugar) molecule) with the unsaturated fatty acid Oleic Acid, that creates a partly water (the sorbitan part) and partly oil soluble (oleic part) molecule.
Trisodium EDTA
What-it-does: chelating
A common helper ingredient that works as a so-called chelating agent. Ithelps products to remain nice and stable for a longer timeby neutralizing the metal ions in the formula (that usually get into there from water) that would otherwise cause some not so nice changes.
Sodium Metaphosphate
What-it-does: buffering, chelating
We don't have description for this ingredient yet.
Linalool - icky
What-it-does: perfuming, deodorant
Linalool is a super common fragrance ingredient. It’s kind of everywhere - both in plants and in cosmetic products. It’s part of 200 natural oils including lavender, ylang-ylang, bergamot, jasmine, geranium and it can be found in 90-95% of prestige perfumes on the market.
The problem with linalool is, that just like limoneneit oxidises on air exposure and becomes allergenic. That’s why a product containing linalool that has been opened for several months is more likely to be allergenic than a fresh one.
A study made in the UK with 483 people tested the allergic reaction to 3% oxidised linalool and 2.3% had positive test results.
Limonene - icky
What-it-does: perfuming, solvent, deodorant
A supercommon and cheap fragrance ingredient. It's in many plants, e.g. rosemary, eucalyptus, lavender, lemongrass, peppermint and it's the main component (about 50-90%) of the peel oil of citrus fruits.
It does smellnice but the problemis that it oxidizes on air exposure and the resulting stuff is not good for the skin. Oxidizedlimonene cancause allergic contact dermatitis and counts asa frequent skin sensitizer.
Limonene's nr1 function is definitely being a fragrance component, but there are several studies showing that it's also a penetration enhancer, mainly for oil-loving components.
All in all, limonene has some pros and cons, but - especially if your skin is sensitive -the cons probably outweigh the pros.
Sodium Metabisulfite
What-it-does: antioxidant, preservative
We don't have description for this ingredient yet.
Citronellol - icky
What-it-does: perfuming
Citronellol is a very common fragrance ingredient with a nice rose-like odor. In the UK, it’s actually the third most often listed perfume on the ingredient lists.
It can be naturally found in geranium oil (about 30%) or rose oil (about 25%).
As with all fragrance ingredients, citronellol can also cause allergic contact dermatitis and should be avoided if you have perfume allergy. In a 2001 worldwide study with 178 people with known sensitization to fragrances citronellol tested positive in 5.6% of the cases.
There is no known anti-aging or positive skin benefits of the ingredient. It’s in our products to make it smell nice.
Geraniol - icky
What-it-does: perfuming
Geraniol is a common fragrance ingredient. It smells like rose and can be found in rose oil or in small quantities in geranium, lemon and many other essential oils.
Just like other similar fragrance ingredients (like linalool and limonene) geraniol also oxidises on air exposure and becomes allergenic. Best to avoid if you have sensitive skin.
Alpha-Isomethyl Ionone - icky
What-it-does: perfuming
It’s a common fragrance ingredient that is one of the “EU 26 fragrances” that has to be labelled separately (and cannot be simply included in the term “fragrance/perfume” on the label) because of allergen potential. Best to avoid if your skin is sensitive.
Benzyl Benzoate - icky
What-it-does: solvent, perfuming, antimicrobial/antibacterial
A common fragrance ingredient that has a faint sweet balsamic smell. It can also be a solvent and canfight against microbes and insects very well.
It's one of the “EU 26 fragrances” that has to be labelled separately because ofallergen potential. Best to avoid if your skin is sensitive.
Tocopherol - goodie
Also-called: Vitamin E | What-it-does: antioxidant | Irritancy: 0-3 | Comedogenicity: 0-3
- Primary fat-soluble antioxidant in our skin
- Significant photoprotection against UVB rays
- Vit C + Vit E work in synergy and provide great photoprotection
- Has emollient properties
- Easy to formulate, stable and relatively inexpensive
Read all the geeky details about Tocopherol here >>
Phenoxyethanol
What-it-does: preservative
It’s pretty much the current IT-preservative. It’s safe and gentle, but even more importantly, it’s not a feared-by-everyone-mostly-without-scientific-reason paraben.
It’s not something new: it was introduced around 1950 and today it can be used up to 1% worldwide. It can be found in nature - in green tea - but the version used in cosmetics is synthetic.
Other than having a good safety profile and being quite gentle to the skin it has some other advantages too. It can be used in many types of formulations as it has great thermal stability (can be heated up to 85°C) and works on a wide range of pH levels (ph 3-10).
It’s often used together with ethylhexylglycerin as it nicely improves the preservative activity of phenoxyethanol.
Sodium Benzoate
What-it-does: preservative
A helper ingredient that helps to makethe products stay nice longer, aka preservative. It works mainly against fungi.
It’s pH dependent and works best at acidic pH levels (3-5). It’s not strong enough to be used in itself so it’s always combined with something else, often with potassium sorbate.
Fragrance (Parfum) - icky
Also-called: Fragrance, Parfum;Parfum/Fragrance | What-it-does: perfuming
Exactly what it sounds: nice smelling stuff put into cosmetic products so that the end product also smells nice. Fragrance in the US and parfum in the EU is a generic term on the ingredient list that is made up of 30 to 50 chemicals on average (but it can have as much as 200 components!).
If you are someone who likes to know what you put on your face then fragrance is not your best friend - there's no way to know what’s really in it.
Also, if your skin is sensitive, fragrance is again not your best friend. It’s the number one cause of contact allergy to cosmetics. It’s definitely a smart thing to avoid with sensitive skin (and fragrance of any type - natural is just as allergic as synthetic, if not worse!).
Iron Oxides (Ci 77491)
Also-called: Ci 77491/77492/77499 | What-it-does: colorant | Irritancy: 0 | Comedogenicity: 0
A bit of a sloppy ingredient name as it covers not one butthree pigments: red, yellow and black iron oxide.
The triois invaluable for "skin-colored" makeup products (think your foundation and pressed powder) as blendingthese three shades carefully can produce almost any shade of natural-looking flesh tones.
Iron Oxides (Ci 77492)
Also-called: Ci 77491/77492/77499 | What-it-does: colorant | Irritancy: 0 | Comedogenicity: 0
A bit of a sloppy ingredient name as it covers not one butthree pigments: red, yellow and black iron oxide.
The triois invaluable for "skin-colored" makeup products (think your foundation and pressed powder) as blendingthese three shades carefully can produce almost any shade of natural-looking flesh tones.
