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
EmollientTitanium Dioxide
Cosmetic ColorantZinc Oxide
Cosmetic ColorantGlycerin
HumectantPEG-10 Dimethicone
Skin ConditioningCaprylic/Capric Triglyceride
MaskingDipropylene Glycol
HumectantDimethicone
EmollientCetyl Ethylhexanoate
EmollientNiacinamide
SmoothingPolymethylsilsesquioxane
Disteardimonium Hectorite
StabilisingBetaine
HumectantMagnesium Sulfate
Sorbitan Sesquioleate
EmulsifyingCI 77492
Cosmetic ColorantSilica
Abrasive1,2-Hexanediol
Skin ConditioningDimethicone Crosspolymer
Emulsion StabilisingAcrylates/Dimethicone Copolymer
Skin ConditioningMoringa Oleifera Seed Oil
EmollientTriethoxycaprylylsilane
Candida Bombicola/Glucose/Methyl Rapeseedate Ferment
AntimicrobialGlycosyl Trehalose
Emulsion StabilisingPalmitic Acid
EmollientCI 77491
Cosmetic ColorantHydrogenated Starch Hydrolysate
HumectantCaprylyl Glycol
EmollientTocopheryl Acetate
AntioxidantEthylhexylglycerin
Skin ConditioningAluminum Hydroxide
EmollientCI 77499
Cosmetic ColorantHydrolyzed Hyaluronic Acid
HumectantPanthenol
Skin ConditioningAdenosine
Skin ConditioningArtemisia Vulgaris Oil
PerfumingCitrus Aurantium Amara Leaf/Twig Oil
MaskingLavandula Angustifolia Oil
MaskingLitsea Cubeba Fruit Oil
MaskingPrunus Persica Flower Extract
MoisturisingLaurus Nobilis Leaf Extract
MaskingCeramide NP
Skin ConditioningPropylene Glycol
HumectantPhytosphingosine
Skin ConditioningHydrogenated Lecithin
EmulsifyingMyristic Acid
CleansingStearic Acid
CleansingTocopherol
AntioxidantWater, Cyclopentasiloxane, Titanium Dioxide, Zinc Oxide, Glycerin, PEG-10 Dimethicone, Caprylic/Capric Triglyceride, Dipropylene Glycol, Dimethicone, Cetyl Ethylhexanoate, Niacinamide, Polymethylsilsesquioxane, Disteardimonium Hectorite, Betaine, Magnesium Sulfate, Sorbitan Sesquioleate, CI 77492, Silica, 1,2-Hexanediol, Dimethicone Crosspolymer, Acrylates/Dimethicone Copolymer, Moringa Oleifera Seed Oil, Triethoxycaprylylsilane, Candida Bombicola/Glucose/Methyl Rapeseedate Ferment, Glycosyl Trehalose, Palmitic Acid, CI 77491, Hydrogenated Starch Hydrolysate, Caprylyl Glycol, Tocopheryl Acetate, Ethylhexylglycerin, Aluminum Hydroxide, CI 77499, Hydrolyzed Hyaluronic Acid, Panthenol, Adenosine, Artemisia Vulgaris Oil, Citrus Aurantium Amara Leaf/Twig Oil, Lavandula Angustifolia Oil, Litsea Cubeba Fruit Oil, Prunus Persica Flower Extract, Laurus Nobilis Leaf Extract, Ceramide NP, Propylene Glycol, Phytosphingosine, Hydrogenated Lecithin, Myristic Acid, Stearic Acid, Tocopherol
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.Â
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 preservativesÂ
Adenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.
Adenosine has many benefits when used. These benefits include hydrating the skin, smoothing skin, and reducing wrinkles. Once applied, adenosine increases collagen production. It also helps with improving firmness and tissue repair.
Studies have found adenosine may also help with wound healing.
In skincare products, Adenosine is usually derived from yeast.
Learn more about AdenosineAluminum 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 HydroxideThis ingredient is an emollient, solvent, and texture enhancer. It is considered a skin-softener by helping the skin prevent moisture loss.
It helps thicken a product's formula and makes it easier to spread by dissolving clumping compounds.
Caprylic Triglyceride is made by combining glycerin with coconut oil, forming a clear liquid.
While there is an assumption Caprylic Triglyceride can clog pores due to it being derived from coconut oil, there is no research supporting this.
Learn more about Caprylic/Capric TriglycerideCaprylyl Glycol is a humectant and emollient, meaning it attracts and preserves moisture.
It is a common ingredient in many products, especially those designed to hydrate skin. The primary benefits are retaining moisture, skin softening, and promoting a healthy skin barrier.
Though Caprylyl Glycol is an alcohol derived from fatty acids, it is not the kind that can dry out skin.
This ingredient is also used as a preservative to extend the life of products. It has slight antimicrobial properties.
Learn more about Caprylyl GlycolCeramide NP is a type of ceramide.
Ceramides are intercellular lipids naturally found in our skin that bonds dead skin cells together to create a barrier. They are known for their ability to hold water and thus are a great ingredient for dry skin.
Ceramides are an important building block for our skin barrier. A stronger barrier helps the skin look more firm and hydrated. By bolstering the skin ceramides act as a barrier against irritating ingredients. This can help with inflammation as well.
If you would like to eat ceramides, sweet potatoes contain a small amount.
Read more about other common types of ceramides here:
Ceramide AP
Ceramide EOP
Ci 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.
Cyclopentasiloxane, 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.
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 DimethiconeDisteardimonium 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 HectoriteEthylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.
You might see Ethylhexylglycerin often paired with other preservatives such as phenoxyethanol. Ethylhexylglycerin has been found to increase the effectiveness of these other preservatives.
Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.
A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.
As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.
Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.
Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.
In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.
This ingredient is organic, colorless, odorless, and non-toxic.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinHydrogenated Lecithin is created from the hydrogenation of lecithin (a group of phospholipids). Hydrogenation is a chemical reaction between hydrogen and another element.
This ingredient is an emollient and emulsifier. As an emollient, it helps soften skin by trapping moisture within. As an emulsifier, it prevents oil and water ingredients from separating.
Propylene Glycol is an odorless, colorless liquid. As a humectant, it helps skin retain moisture. It also aids in delivering active ingredients.
Another role of this ingredient is preventing a product from melting or freezing. Propylene glycol also adds antimicrobrial properties to a product, elongating product lifespan.
This ingredient is considered an organic alcohol and commonly added into both cosmetics and foods.
Those with sensitive skin or conditions may develop a rash when using this ingredient.
Learn more about Propylene GlycolStearic Acid is a fatty acid. It is an emollient, emulsifier, and texture enhancer.
As an emollient, stearic acid helps soften skin. It aids the skin's protective barrier by preventing water loss. It also provides a gentle cleansing effect without stripping away natural oils.
Stearic acid may also be used to enhance the texture of products. It can add volume and stabilize ingredients such as water and oil. This can help water and oil ingredients from separating.
Sources of stearic acid include animal or vegetable fats/oils such as coconut or shea. It can be naturally found in butter, cocoa butter, shea butter, vegetable fats, and animal tallow.
This ingredient may not be Malassezia folliculitis, or fungal-acne safe.
Learn more about Stearic AcidTocopheryl Acetate is AKA Vitamin E. It is an antioxidant and protects your skin from free radicals. Free radicals damage the skin by breaking down collagen.
One study found using Tocopheryl Acetate with Vitamin C decreased the number of sunburned cells.
Tocopheryl Acetate is commonly found in both skincare and dietary supplements.
Learn more about Tocopheryl AcetateTriethoxycaprylylsilane is a silicone used to bind and stabilize ingredients.
As an emulsifier, it helps prevent ingredients from separating. This can help elongate the shelf life of products.
Triethoxycaprylylsilane is often used to coat mineral sunscreens ingredients to help give a better feel. It also helps reduce oxidative stress in sunscreens.
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. 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