Missha M Signature Real Complete BB Cream SPF 25 PA++ Versus Jigott Aloe Sun Protect BB Cream SPF 41 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 ConditioningEthylhexyl Methoxycinnamate
UV AbsorberButylene Glycol
HumectantCetearyl Alcohol
Emollient4-Methylbenzylidene Camphor
UV AbsorberCyclomethicone
EmollientZinc Oxide
Cosmetic ColorantCaprylic/Capric Triglyceride
MaskingPolysorbate 60
EmulsifyingGlyceryl Stearate
EmollientPEG-100 Stearate
SurfactantParaffinum Liquidum
EmollientTitanium Dioxide
Cosmetic ColorantSorbitan Sesquioleate
EmulsifyingCI 77492
Cosmetic ColorantXanthan Gum
EmulsifyingMagnesium Aluminum Silicate
AbsorbentBetaine
HumectantCI 77499
Cosmetic ColorantCI 77491
Cosmetic ColorantMethylparaben
PreservativePropylparaben
PreservativeTocopheryl Acetate
AntioxidantParfum
MaskingCoumarin
PerfumingGeraniol
PerfumingButylphenyl Methylpropional
PerfumingLinalool
PerfumingCitronellol
PerfumingHexyl Cinnamal
PerfumingLimonene
PerfumingAlpha-Isomethyl Ionone
PerfumingDisodium EDTA
Aloe Barbadensis Leaf Extract
EmollientCamellia Sinensis Leaf Extract
AntimicrobialHydrolyzed Collagen
EmollientPortulaca Oleracea Extract
Skin ConditioningWater, Ethylhexyl Methoxycinnamate, Butylene Glycol, Cetearyl Alcohol, 4-Methylbenzylidene Camphor, Cyclomethicone, Zinc Oxide, Caprylic/Capric Triglyceride, Polysorbate 60, Glyceryl Stearate, PEG-100 Stearate, Paraffinum Liquidum, Titanium Dioxide, Sorbitan Sesquioleate, CI 77492, Xanthan Gum, Magnesium Aluminum Silicate, Betaine, CI 77499, CI 77491, Methylparaben, Propylparaben, Tocopheryl Acetate, Parfum, Coumarin, Geraniol, Butylphenyl Methylpropional, Linalool, Citronellol, Hexyl Cinnamal, Limonene, Alpha-Isomethyl Ionone, Disodium EDTA, Aloe Barbadensis Leaf Extract, Camellia Sinensis Leaf Extract, Hydrolyzed Collagen, Portulaca Oleracea Extract
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.
Learn more about Butylene GlycolCamellia Sinensis Leaf Extract (tea extract) is one of the most well-researched plant extracts in skincare with an impressive resume.
Black tea, green tea, and oolong tea are all harvested from the Camellia Sinensis plant.
Studies show green tea extract and its catechins (like epigallocatechin gallate (EGCG)) help your skin cells product energy more efficiently and reducing the number of free-radicals that can damage your skin from the inside.
In lab-grown skin models, this translated to younger, healthier, and stronger skin.
There's also good sun protection data; researchers saw less DNA damage and redness on human skin when green tea was applied before UVB exposure. And the more they applied, the better the protection.
Needless to say, this ingredient shouldn't replace your sunscreen. But it is a great supportive ingredient that you can already find in many sunscreens and antioxidant serums.
A 2009 study found a 2% green tea lotion was effective for mild-to-moderate acne thanks to its anti-inflammatory and mild antimicrobial activity.
The quality of the extract matters a lot here:
Good extracts contain 50-90% catechins while lower quality ones are mostly there for marketing. We recommend reaching out to the brand if you have questions about the quality or source of their ingredients.
Human Repeated Insult Patch Testing showed no irritation or sensitization at use concentrations (0.86% in leave-on products and up to 30% as leaf water).
Learn more about Camellia Sinensis Leaf ExtractCaprylic/Capric Triglyceride (aka MCT Oil) is a lightweight emollient, solvent, and texture enhancer. It is considered a skin-softener by helping to prevent moisture loss.
Though it behaves like an oil, it is not technically one due to its chemical composition. One perk of this ingredient is that it is very stable, resistant to oxidation, and unlikely to go rancid.
In practice, that translates to a long shelf life and a consistently elegant skin feel.
While there is an assumption Caprylic Triglyceride can clog pores due to it being derived from coconut oil, there is no research supporting this. Just patch test if you have concerns.
Fractionated coconut oil and MCT Oil are both listed as Caprylic/Capric Triglyceride according to INCI. This is because INCI names are based on the ingredient’s final chemical composition and not its marketing name or source.
This ingredient is treated as the gold standard fungal acne safe oil. Even though it is coconut derived, the problematic lauric acid is stripped out.
This leaves just caprylic (C8) and capric (C10) acid. These chain lengths actually trend antifungal; a 2020 study found caprylic acid was enough to disrupt Malassezia furfur cell membrane, with a caprylic acid derivative damaging membrane structures at concentrations as low as 0.2%.
Learn more about Caprylic/Capric TriglycerideCi 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.
Disodium 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 EDTAHydrolyzed Collagen is Collagen (usually sourced from fish, bovine, or porcine byproducts) that's been broken down into smaller peptides. This makes it water-soluble and easy to blend into formulations.
In a formula, it works mainly as a skin-conditioning and moisturizing agent.
The small peptides and amino acids (including Natural Moisturizing Factor components like Hydroxyproline, Serine, and Aspartic Acid) help the surface of the skin hold onto water, feel softer, and look temporarily plumper.
This ingredient also has mild film-forming and antioxidant properties with research showing the antioxidant effect is stronger the lower the molecular weight of the peptides.
It's worth being realistic here:
Topically applied Hydrolyzed Collagen conditions the upper layers of skin rather than rebuilding the structural collagen deep in your dermis (the wrinkle-and-firmness benefits people associate with Collagen mostly come from oral supplements in studies, not topicals).
However, recent lab and skin-model work on Hydrolyzed Fish Collagen has shown promising effects on cell viability and wound healing when used as an active.
Typical concentrations range from 0.2-2%, but the percentage can go much higher in rinse-off or hair products (sometimes even above 50%).
Clinical studies on this ingredient showed no irritation, sensitization, or phototoxicity.
If you are looking for vegan collagen, it usually goes by a different INCI name like hydrolyzed soy protein. Vegan collagen is derived from yeast, bacteria, or plant sources.
The results are varied.
A study from 2021 found hydrolyzed collagen increased elasticity and improved wrinkles in 1,125 participants between age 20 and 70. Another study found increased skin thickness in participants between the ages of 45 to 59.
However, It is difficult to prove that oral collagen will end up working on your skin. Many of the studies using hydrolyzed collagen also add several vitamins and nutrients into the test mixture as well.
Further studies are needed at this time.
Learn more about Hydrolyzed CollagenParfum 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 ParfumTocopheryl Acetate is a stable, shelf-friendly form of vitamin E.
Formulators love it because plain vitamin E oxidizes quickly once it hits air. This acetate version stays stable and resists going off, helping to extend a product's shelf life.
It's actually inactive on its own and works like a slow-release "storage" form; the enzymes in your skin called esterases gradually convert it into active vitamin E over time.
One in vivo study showed 5% of the acetate in the living layer of the epidermis converted to vitamin E after 5 days of application. This study also found the skin gained protection against UV damage even though the conversion was slow and small.
Once converted, vitamin E acts as a skin's main fat-soluble antioxidant that fights free radicals to protect skin from damage.
Topical vitamin E generally boosts the skin's photoprotection, and it reduced UV-damage in animal models.
This ingredient has some brightening potential but it's more of a prevention ingredient than spot-fader. Cell studies show it can slow down melanin production but it's worth noting that it's not the most powerful brightener out there.
Overall, it has a pretty solid safety profile and has been found to be non-irritating and non-comedogenic. Allergic reactions may happen but stay rare due to how widely the ingredient gets used.
The concentration will vary depending on the formula; industry data shows 0.1% in baby lotions, 3% in lipsticks, and 5% in foot powders. You can also find this ingredient at 100% in a pure vitamin E oil.
Most leave-on skincare keeps it at the lower end, often between 0.5-1%.
Learn more about Tocopheryl AcetateWater. 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 WaterXanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.
On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.
Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.
Learn more about Xanthan GumZinc Oxide (ZO) is a mineral broad-spectrum UV filter and the broadest-spectrum filter recognized by the FDA. It covers everything from UVB through to long-wave UVA.
On top of sun protection, it has skin protectant and skin-soothing properties too.
Here's a myth worth busting: mineral filters are usually described as working by "reflecting" or "bouncing" UV off your skin.
That's mostly not true: when researchers actually measured it, ZO and Titanium Dioxide reflect only about 4-5% of UV (less than SPF 2 worth of protection).
The vast majority of the work (~95%) is done by absorption, similar to chemical UV filters. ZO is a semiconductor that absorbs UV photos through its energy band gap.
So the old "physical blocker vs. chemical absorber" framing is really an oversimplification.
Zinc Oxide is one of the most effective broad-spectrum UV filters out there. It protects across UVB, UVA2, and UVA1 with a flat, even absorption curve across the whole UVA-UVB range.
That uniform UVA coverage is its standout feature; titanium dioxide skews more toward UVB as its particle size drops so ZO gives more consistent and extended UVA protection.
It's also very photostable. As an inorganic oxide, ZO doesn't break down in sunlight the way some organic filters can, so it holds up over a day of wear.
This ingredient is gentle and soothing, making it go-to for sunscreens aimed at sensitive skin, rosacea, or ecezma-prone skin, babies, and children.
It's also unlikely to cause the "eye sting" that some sunscreen ingredients are known for, and regulatory agencies broadly consider it non-toxic and safe for topical use.
Beyond sun protection, ZO is also a recognized OTC skin protectant. It forms a breathable barrier that shields skin from moisture and irritation while supporting healing. This is why you'll see it as a classic active in diaper rash creams.
The only downside to ZO is that it can leave a visible white cast, especially on deeper skin tones. This is the main reason mineral sunscreens have historically felt less cosmetically elegant than chemical or hybrid formulas.
Zinc Oxide comes in both non-nano and nano forms. The dividing line is 100nm and anything under is classified as a nanomaterial by the EU.
The nano version scatters less visible light which cuts down white case and gives a lighter, more wearable texture.
Another thing worth understanding about formulation:
Uncoated ZO has some inherent photocatalytic activity. This just means it can generate reactive oxygen species under UV. It's exactly why cosmetic-grade ZO is almost always surface-coated; this coating suppresses that reactivity and improves how the powder disperses and feels.
A well-formulated coated ZO largely sidesteps this issue.
Zinc Oxide is commonly used anywhere from 10% up to the regulatory maximum in sunscreens (25%).
Mineral-only broad-spectrum products often land in the 15-25% range to hit higher SPF and UVA values. Keep in mind SPF performance depends heavily on particle size, dispersion, and the rest of the formula, and not just the percentage.
As an OTC skin protectant like diaper creams, ZO typically runs higher at roughly 10-40%.
This ingredient is generally easy to work with and doesn't photodegrade.
The only thing to know is that uncoated ZO can be a bit reactive in a formula.
Under UV, it can break down sensitive ingredients like other actives or UV filters. This is another reason coated versions are standard. ZO can also react with very acidic ingredients or throw off stability of some creams. A good formula will get around this with the right coatings and dispersion.
The EU's Scientific Committee on Consumer Safety has concluded that ZO nanoparticles "can be considered to not pose any risk of adverse effects in humans after application on healthy, intact or sunburnt skin".
You might hear that ZO is "toxic"; this is because an in-vitro (test tube) study suggested micronized ZO had potential phototoxicity. In vivo (human) investigations have disputed this and the results have come back reassuring.
So does ZO penetrate skin? The short answer is no, not in any way that matters.
The most relevant evidence comes from real-world human studies: in one, volunteers applied ZO nanoparticle sunscreen hourly for six hours and daily for five days. The advanced imaging showed the particles stayed on the surface and never reached the living epidermis, and no cellular toxicity was found.
Other in-vivo and ex-vivo work agree; ZO nanoparticles don't cross the stratum corneum, even on flexed, massaged, or barrier-impaired skin.
A small amount of solubilized zinc ions can dissolve off the particles and enter the upper skin. But the quantities are tiny compared to the zinc already naturally present in your body, and studies haven't found this to cause local toxicity.
The sunscreen bans you've heard of (like Hawaii's) are aimed at two chemical filters, Oxybenzone and Octinoxate. ZO itself it not banned and is often recommended instead.
So far, there's no solid evidence that any form of ZO harms reefs. It is an ongoing and active area of study, and worth keeping an eye on.
If you're traveling somewhere with these rules, a non-nano mineral sunscreen is the safe bet.
Learn more about Zinc Oxide