Missha M Signature Real Complete BB Cream SPF 25 PA++ Versus Espoir ProTailor Be Velvet Cushion SPF34 PA++
What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningCI 77891
Cosmetic ColorantCyclopentasiloxane
EmollientGlycerin
HumectantButylene Glycol
HumectantZinc Oxide
Cosmetic ColorantHydrogenated Polydecene
EmollientPhenyl Trimethicone
Skin ConditioningOrbignya Oleifera Seed Oil
EmollientArbutin
AntioxidantC12-15 Alkyl Benzoate
AntimicrobialCetyl PEG/PPG-10/1 Dimethicone
EmulsifyingSodium Chloride
MaskingMica
Cosmetic ColorantCyclohexasiloxane
EmollientSorbitan Isostearate
EmulsifyingCaprylyl Methicone
Skin ConditioningHydrogenated Polyisobutene
EmollientHydrogenated Castor Oil Isostearate
Skin ConditioningBeeswax
Emulsion StabilisingPolyglyceryl-4 Isostearate
EmulsifyingSorbitan Olivate
EmulsifyingAlumina
AbrasiveHexyl Laurate
EmollientTalc
AbrasiveCI 77492
Cosmetic ColorantXanthan Gum
EmulsifyingMethyl Methacrylate Crosspolymer
Ginkgo Biloba Leaf Extract
Skin ConditioningDimethicone/Vinyl Dimethicone Crosspolymer
Skin ConditioningDisteardimonium Hectorite
StabilisingCaprylyl Glycol
EmollientStearic Acid
CleansingAnthemis Nobilis Flower Water
MaskingLavandula Angustifolia Flower Water
Skin ConditioningAluminum Hydroxide
EmollientCI 77491
Cosmetic ColorantCI 77499
Cosmetic ColorantEthylhexylglycerin
Skin ConditioningOzokerite
Emulsion StabilisingPhenoxyethanol
PreservativeHydrogen Dimethicone
Hydrogenated Lecithin
EmulsifyingTocopheryl Acetate
AntioxidantCeramide NP
Skin ConditioningPropylene Carbonate
SolventCholesterol
EmollientTriethoxycaprylylsilane
Dimethicone
Emollient1,2-Hexanediol
Skin ConditioningPropanediol
SolventMethicone
EmollientAdenosine
Skin ConditioningBletilla Striata Root Extract
Skin ConditioningEchinacea Purpurea Extract
MoisturisingPerilla Ocymoides Leaf Extract
TonicBacillus/Soybean Ferment Extract
Skin ConditioningGlyceryl Caprylate
EmollientSqualane
EmollientMacadamia Ternifolia Seed Oil
EmollientOleic Acid
EmollientDisodium EDTA
Brassica Campestris Sterols
EmollientGlycine
BufferingParfum
MaskingCaprylic/Capric Triglyceride
MaskingVitis Vinifera Fruit Water
Skin ConditioningPunica Granatum Extract
AstringentSalicornia Herbacea Extract
Skin ConditioningPropylene Glycol
HumectantPanax Ginseng Root Extract
EmollientCucurbita Pepo Fruit Extract
Skin ConditioningJuglans Regia Seed Extract
Skin ConditioningAngelica Keiskei Leaf/Stem Extract
Skin ConditioningOldenlandia Diffusa Extract
Skin ConditioningHouttuynia Cordata Extract
Skin ConditioningLycium Chinense Fruit Extract
AntioxidantCnidium Officinale Root Extract
Skin ConditioningSerine
MaskingBambusa Textilis Stem Extract
Skin ConditioningGlutamic Acid
HumectantLuffa Cylindrica Fruit Extract
Skin ConditioningCucumis Sativus Fruit Extract
EmollientCamellia Japonica Flower Extract
EmollientPrunus Persica Fruit Extract
AbrasiveGanoderma Lucidum Extract
Skin ProtectingVigna Radiata Seed Extract
Skin ConditioningLecithin
EmollientPolysorbate 20
EmulsifyingCoix Lacryma-Jobi Ma-Yuen Seed Extract
Skin ConditioningAspartic Acid
MaskingCitrus Aurantifolia Fruit Extract
Skin ConditioningCocos Nucifera Fruit Extract
EmollientLeucine
Skin ConditioningSodium Hyaluronate
HumectantAlcohol
AntimicrobialCoptis Japonica Root Extract
Skin ConditioningArtemisia Vulgaris Extract
Skin ConditioningAlanine
MaskingLysine
Skin ConditioningMangifera Indica Fruit Extract
Skin ConditioningMorus Alba Root Extract
BleachingTaraxacum Officinale Rhizome/Root Extract
Skin ConditioningBeta-Glucan
Skin ConditioningAcorus Calamus Root Extract
PerfumingCitrus Unshiu Peel Extract
MaskingCornus Officinalis Fruit Extract
Skin ConditioningRhus Semialata Gall Extract
Skin ConditioningArginine
MaskingCitric Acid
BufferingTyrosine
MaskingPhenylalanine
MaskingThreonine
Valine
MaskingProline
Skin ConditioningIsoleucine
Skin ConditioningAsarum Sieboldii Root Extract
Skin ConditioningIris Ensata Extract
Skin ConditioningPsidium Guajava Fruit Extract
AstringentGlycyrrhiza Glabra Root Extract
BleachingHordeum Vulgare Leaf Extract
Skin ConditioningNelumbo Nucifera Flower Extract
Skin ConditioningOenanthe Javanica Extract
AntimicrobialHistidine
HumectantPotassium Sorbate
PreservativeSodium Benzoate
MaskingMethionine
Skin ConditioningCysteine
AntioxidantDaucus Carota Sativa Root Extract
Skin ConditioningPrunus Armeniaca Kernel Extract
Skin ConditioningEthyl Hexanediol
SolventFragaria Chiloensis Fruit Extract
Skin ConditioningCamellia Sinensis Leaf Extract
AntimicrobialSodium Ascorbyl Phosphate
AntioxidantHydrolyzed Collagen
EmollientPrunus Avium Fruit Extract
Skin ConditioningScrophularia Buergeriana Root Extract
EmollientLinaria Japonica Extract
Skin ConditioningScutellaria Baicalensis Root Extract
AstringentCarica Papaya Fruit Extract
Skin ConditioningPentylene Glycol
Skin ConditioningCaprylhydroxamic Acid
Copper Tripeptide-1
Skin ConditioningPalmitoyl Pentapeptide-4
Skin ConditioningAcetyl Hexapeptide-8
HumectantTropolone
Skin ConditioningWater, CI 77891, Cyclopentasiloxane, Glycerin, Butylene Glycol, Zinc Oxide, Hydrogenated Polydecene, Phenyl Trimethicone, Orbignya Oleifera Seed Oil, Arbutin, C12-15 Alkyl Benzoate, Cetyl PEG/PPG-10/1 Dimethicone, Sodium Chloride, Mica, Cyclohexasiloxane, Sorbitan Isostearate, Caprylyl Methicone, Hydrogenated Polyisobutene, Hydrogenated Castor Oil Isostearate, Beeswax, Polyglyceryl-4 Isostearate, Sorbitan Olivate, Alumina, Hexyl Laurate, Talc, CI 77492, Xanthan Gum, Methyl Methacrylate Crosspolymer, Ginkgo Biloba Leaf Extract, Dimethicone/Vinyl Dimethicone Crosspolymer, Disteardimonium Hectorite, Caprylyl Glycol, Stearic Acid, Anthemis Nobilis Flower Water, Lavandula Angustifolia Flower Water, Aluminum Hydroxide, CI 77491, CI 77499, Ethylhexylglycerin, Ozokerite, Phenoxyethanol, Hydrogen Dimethicone, Hydrogenated Lecithin, Tocopheryl Acetate, Ceramide NP, Propylene Carbonate, Cholesterol, Triethoxycaprylylsilane, Dimethicone, 1,2-Hexanediol, Propanediol, Methicone, Adenosine, Bletilla Striata Root Extract, Echinacea Purpurea Extract, Perilla Ocymoides Leaf Extract, Bacillus/Soybean Ferment Extract, Glyceryl Caprylate, Squalane, Macadamia Ternifolia Seed Oil, Oleic Acid, Disodium EDTA, Brassica Campestris Sterols, Glycine, Parfum, Caprylic/Capric Triglyceride, Vitis Vinifera Fruit Water, Punica Granatum Extract, Salicornia Herbacea Extract, Propylene Glycol, Panax Ginseng Root Extract, Cucurbita Pepo Fruit Extract, Juglans Regia Seed Extract, Angelica Keiskei Leaf/Stem Extract, Oldenlandia Diffusa Extract, Houttuynia Cordata Extract, Lycium Chinense Fruit Extract, Cnidium Officinale Root Extract, Serine, Bambusa Textilis Stem Extract, Glutamic Acid, Luffa Cylindrica Fruit Extract, Cucumis Sativus Fruit Extract, Camellia Japonica Flower Extract, Prunus Persica Fruit Extract, Ganoderma Lucidum Extract, Vigna Radiata Seed Extract, Lecithin, Polysorbate 20, Coix Lacryma-Jobi Ma-Yuen Seed Extract, Aspartic Acid, Citrus Aurantifolia Fruit Extract, Cocos Nucifera Fruit Extract, Leucine, Sodium Hyaluronate, Alcohol, Coptis Japonica Root Extract, Artemisia Vulgaris Extract, Alanine, Lysine, Mangifera Indica Fruit Extract, Morus Alba Root Extract, Taraxacum Officinale Rhizome/Root Extract, Beta-Glucan, Acorus Calamus Root Extract, Citrus Unshiu Peel Extract, Cornus Officinalis Fruit Extract, Rhus Semialata Gall Extract, Arginine, Citric Acid, Tyrosine, Phenylalanine, Threonine, Valine, Proline, Isoleucine, Asarum Sieboldii Root Extract, Iris Ensata Extract, Psidium Guajava Fruit Extract, Glycyrrhiza Glabra Root Extract, Hordeum Vulgare Leaf Extract, Nelumbo Nucifera Flower Extract, Oenanthe Javanica Extract, Histidine, Potassium Sorbate, Sodium Benzoate, Methionine, Cysteine, Daucus Carota Sativa Root Extract, Prunus Armeniaca Kernel Extract, Ethyl Hexanediol, Fragaria Chiloensis Fruit Extract, Camellia Sinensis Leaf Extract, Sodium Ascorbyl Phosphate, Hydrolyzed Collagen, Prunus Avium Fruit Extract, Scrophularia Buergeriana Root Extract, Linaria Japonica Extract, Scutellaria Baicalensis Root Extract, Carica Papaya Fruit Extract, Pentylene Glycol, Caprylhydroxamic Acid, Copper Tripeptide-1, Palmitoyl Pentapeptide-4, Acetyl Hexapeptide-8, Tropolone
Water
Skin ConditioningCyclopentasiloxane
EmollientCI 77891
Cosmetic ColorantEthylhexyl Methoxycinnamate
UV AbsorberDimethicone
EmollientPropanediol
SolventPolymethyl Methacrylate
Alcohol Denat.
AntimicrobialDiisopropyl Sebacate
EmollientPEG/PPG-18/18 Dimethicone
EmulsifyingZinc Oxide
Cosmetic ColorantTitanium Dioxide
Cosmetic ColorantDisteardimonium Hectorite
StabilisingIsododecane
EmollientGlycerin
HumectantSodium Chloride
MaskingAlumina
AbrasiveVinyl Dimethicone/Methicone Silsesquioxane Crosspolymer
Acrylates/Ethylhexyl Acrylate/Dimethicone Methacrylate Copolymer
Skin ConditioningAcrylates/Polytrimethylsiloxymethacrylate Copolymer
Skin ConditioningCI 77492
Cosmetic ColorantAcrylates/Dimethicone Copolymer
Skin ConditioningPEG-10 Dimethicone
Skin Conditioning1,2-Hexanediol
Skin ConditioningNylon-6/12
AbsorbentAluminum Hydroxide
EmollientTriethoxycaprylylsilane
Parfum
MaskingCaprylyl Glycol
EmollientStearic Acid
CleansingPolysilicone-11
CI 77491
Cosmetic ColorantGlyceryl Caprylate
EmollientOryza Sativa Bran Wax
Skin ConditioningDisodium EDTA
CI 77499
Cosmetic ColorantButylene Glycol
HumectantPanthenol
Skin ConditioningGluconolactone
Skin ConditioningBHT
AntioxidantWater, Cyclopentasiloxane, CI 77891, Ethylhexyl Methoxycinnamate, Dimethicone, Propanediol, Polymethyl Methacrylate, Alcohol Denat., Diisopropyl Sebacate, PEG/PPG-18/18 Dimethicone, Zinc Oxide, Titanium Dioxide, Disteardimonium Hectorite, Isododecane, Glycerin, Sodium Chloride, Alumina, Vinyl Dimethicone/Methicone Silsesquioxane Crosspolymer, Acrylates/Ethylhexyl Acrylate/Dimethicone Methacrylate Copolymer, Acrylates/Polytrimethylsiloxymethacrylate Copolymer, CI 77492, Acrylates/Dimethicone Copolymer, PEG-10 Dimethicone, 1,2-Hexanediol, Nylon-6/12, Aluminum Hydroxide, Triethoxycaprylylsilane, Parfum, Caprylyl Glycol, Stearic Acid, Polysilicone-11, CI 77491, Glyceryl Caprylate, Oryza Sativa Bran Wax, Disodium EDTA, CI 77499, Butylene Glycol, Panthenol, Gluconolactone, BHT
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.
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 preservatives
Alumina is another name for the compound aluminum oxide. It is a white powder used as a thickener, absorbent, and abrasive.
As an absorbent, alumina can give a mattifying effect. It is used in mineral sunscreens to help coat nano-sized filters, such as titanium dioxide. By increasing the size of the UV filters, these ingredients stay on the skin for a longer time. By coating small sized ingredients, alumina helps thicken a product.
Alumina may be used as an abrasive, or exfoliant.
Alumina is naturally occurring in the mineral corundum. Certain varieties of corundum create rubies and sapphires. Corundum is also the crystalline form of alumina.
Learn more about AluminaAluminum Hydroxide is a form of aluminum. It can be naturally found in nature as the mineral gibbsite. In cosmetics, Aluminum Hydroxide is used as a colorant, pH adjuster, and absorbent.
As a colorant, Aluminum Hydroxide may add opacity, or reduce the transparency. Aluminum hydroxide is contains both basic and acidic properties.
According to manufacturers, this ingredient is an emollient and humectant. This means it helps hydrate the skin.
In medicine, this ingredient is used to help relieve heartburn and help heal ulcers.
There is currently no credible scientific evidence linking aluminum hydroxide in cosmetics to increased cancer risk.
Major health organizations allow the use of aluminum hydroxide in personal care products and have not flagged it as a carcinogenic risk at typical usage levels.
Learn more about Aluminum HydroxideButylene 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 GlycolCaprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created.
Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin.
Because it is not a free-fatty acid or alcohol, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on).
Learn more about Caprylyl GlycolCi 77491 is also hydrated iron III oxide. It's sole purpose is to give a red/pink hue to products.
Iron III oxides are classified as inorganic chemicals for coloring.
Synthetically created Ci 77491 is considered safer than those naturally found. This is because the synthetically created version may contain less impurities. Iron oxides are generally non-toxic and non-allergenic.
Learn more about CI 77491CI 77492 is also hydrated iron III oxide. It's sole purpose is to give a yellow hue to products.
Iron III oxides are classified as inorganic chemicals for coloring.
Synthetically created CI 77492 is considered safer than those naturally found. This is because the synthetically created version may contain less impurities. Iron oxides are generally non-toxic and non-allergenic.
Learn more about CI 77492Ci 77499 is also hydrated iron III oxide. It is created from mixing red and black iron oxides. This helps give shades of darkness to a product.
Iron III oxides are classified as inorganic chemicals for coloring.
Ci 77891 is a white pigment from Titanium dioxide. It is naturally found in minerals such as rutile and ilmenite.
It's main function is to add a white color to cosmetics. It can also be mixed with other colors to create different shades.
Ci 77891 is commonly found in sunscreens due to its ability to block UV rays.
Learn more about CI 77891Cyclopentasiloxane, 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 CyclopentasiloxaneDimethicone 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 DimethiconeDisodium EDTA is a chelating agent. It grabs onto and deactivates metal ions that sneak into your products from water, packaging, or air.
This ingredient mainly works behind the scenes and helps with:
On top of that, this ingredient can counteract the effects of hard water by binding to the minerals in it.
One thing worth knowing is that Disodium EDTA has been shown to be a mild penetration enhancer. It can help other ingredients absorb into skin more effectively which can be a double-edged sword (great for actives, but can also make the active too strong if you have sensitive skin).
Clinical patch testing showed no significant skin irritation at typical use concentrations and minimal dermal absorption.
You'll most likely see this ingredient near the end of an ingredient list. It's typically found in concentrations less than 1%.
Learn more about Disodium EDTADisteardimonium Hectorite comes from the clay mineral named hectorite. It is used to add thickness to a product.
It can also help stabilize a product by helping to disperse other ingredients.
Hectorite is a rare, white clay mineral.
Learn more about Disteardimonium HectoriteGlycerin (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 GlycerinGlyceryl Caprylate comes from glycerin and caprylic acid. It is an emollient, co-emulsifier, and preservative booster.
Its short C8 fatty acid chain makes it behave differently from its longer-chain emollient cousins like Glyceryl Stearate. It feels more lightweight, fast-absorbing, and silky instead of rich and waxy.
As a co-emulsifier, its "head" and "tail" sit at the oil-water interface. But overall, the short C8 tail and not being water soluble means it doesn't really have the muscle to emulsify a formula on its own. That's why you'll often see it paired with a primary emulsifier like Cetearyl Glucoside.
Interestingly, Glyceryl Caprylate acts as a preservative booster. This is because its fatty-acid backbone disrupts microbial lipid membranes. It shows excellent activity against bacteria and yeast but is weaker against mold.
Typical concentrations range from 0.5-1% and this ingredient is generally non-irritating.
Because this ingredient has a C8 fatty acid chain, it is outside the range that the Malassezia yeast metabolizes (making it fungal acne safe).
Learn more about Glyceryl CaprylateParfum 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 ParfumPropanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.
It’s often used to:
Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
Learn more about PropanediolChances are, you eat sodium chloride every day. Sodium Chloride is also known as table salt. This ingredient has many purposes in skincare: thickener, emulsifier, and exfoliator.
You'll most likely find this ingredient in cleansers where it is used to create a gel-like texture. As an emulsifier, it also prevents ingredients from separating.
You might see people debate whether Sodium Chloride is comedogenic, but there actually haven't been any comedogenic tests done on it. Either way, the overall formulation of a product matters a lot more than any single ingredient.
You might see this ingredient used in scrubs as a primary exfoliating ingredient.
Learn more about Sodium ChlorideStearic Acid is a fatty acid that is already found in your skin. It's one of the free fatty acids that works alongside ceramides and cholesterols to maintain your barrier.
In cosmetics, it is a multitasker:
Safety-wise, the CIR Expert Panel has concluded it to be safe in cosmetics when formulated to be non-irritating and non-sensitizing.
Free stearic acid is a C18 fatty acid that the Malassezia yeast can substrate, so this ingredient may not be fungal acne safe.
Learn more about Stearic AcidTriethoxycaprylylsilane is a silicon-based surface modifier that makes sunscreens feel silky and makeup stay put.
Its main job is to coat mineral particles like titanium dioxide, zinc oxide, and color pigments in a thin, oily layer so they spread smoothly, don't clump, and stick to skin better.
This ingredient is typically used at low levels (up to 2.5% in eyeshadow and 1% in lipstick).
Learn more about TriethoxycaprylylsilaneWater. 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 WaterZinc Oxide is a mineral broad-spectrum UV filter; it is the broadest UVA and UVB reflector approved by the FDA. It also has skin protectant and skin soothing properties.
Zinc oxide is one of the most effective broad-spectrum UV filters. It protects against UVB, UVAII, and UVAI. In comparison to its counterpart titanium dioxide, zinc oxide provides uniform and extended UVA protection.
Another great benefit? This ingredient is highly photostable so it won't degrade easily under sunlight.
A common myth is that mineral UV filters are widely believed to primarily reflect UV light.
However, modern research shows titanium dioxide absorbs UV radiation like chemical filters (~95% absorption & 5% reflection).
Zinc oxide has great skin soothing properties so you'll likely find this in sunscreens formulated for sensitive skin or babies/children. It is unlikely to cause "eye sting" like other sunscreen ingredients.
Regulatory agencies consider zinc oxide to be non-toxic and safe. It has also been shown to not penetrate the skin.
Unfortunately, this ingredient does leave a visible white cast. This is why mineral sunscreens are often less cosmetically elegant than chemical or hybrid ones.
In cosmetics, zinc oxide can be found in both non-nano and nano-sized forms. The nano version is used to reduce white cast and improve the texture of sunscreen formulas.
There are ongoing concerns surrounding nano-zinc oxide's impact on marine ecosystems and whether it can be absorbed into skin.
Regarding marine ecosystems and coral reefs, there is no conclusive evidence that any form of zinc oxide (or any other sunscreen ingredients) will cause harm. 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.
There has also been some stir about whether micronized or nano zinc oxide has potential photoxicity and absorption through the skin/lungs.
An in-vitro (done in a test tube or petri dish) study demonstrated micronized zinc oxide to have potential phototoxicity. There's no need to fret; the EU Commission's Scientific Committee on Consumer Safety has stated, "The relevance of these findings needs to be clarified by appropriate investigations in vivo." Or in other words, further studies done on living organisms are needed to prove this.
Current research shows zinc oxide nanoparticles do not penetrate intact or sunburned skin. They either remain on the surface or in the outermost layer of dead skin (stratum corneum).
Zinc oxide is one of only two classified mineral UV filters with titanium dioxide being the other one.
Fun fact: Zinc has been used throughout history as an ingredient in paint and medicine. An Indian text from 500BC is believed to list zinc oxide as a salve for open wound. The Ancient Greek physician Dioscorides has also mentioned the use of zinc as an ointment in 1AD.
Learn more about Zinc Oxide