# Suncare

Topic radar · 4,396 documents · 2021-01-01–2026-10-08 · updated 2026-10-15

Canonical: https://slate.greyb.com/radar/suncare/innovations

## In one minute

### The vehicle is the engineering unit
Encapsulation is the shared construction. Organic filters are loaded into mesoporous silica, lipid nanoparticles, liposomes and polymer capsules, and the particle does two jobs at once: it scatters some ultraviolet itself, and it slows the release of the active, so the same filter load gives more protection. Human studies show the second job is real. Ethylhexyl triazone in lipid microparticles cut penetration into the stratum corneum by about 46% in a tape-stripping study [1]; avobenzone and oxybenzone in mesoporous silica raised SPF by about 26% with lower deposition in human skin [2]; a microencapsulated octocrylene and avobenzone formula showed no filter in the epidermis over eight hours [3]. The filings describe the same construction: mesoporous silica loaded with BEMT and ethylhexyl triazone and coated with titanium dioxide and MBBT [4], an alginate-cholesterol-phospholipid liposome that self-assembles around a chemical filter [5], and a nanolipid carrier built from solid and liquid lipids [6]. The carrier is no longer only academic: suppliers now sell loaded capsules, including silica carrying 45% bemotrizinol [7].

1. [10.1159/000493761](https://doi.org/10.1159/000493761)
2. [10.1016/j.ejpb.2021.10.002](https://doi.org/10.1016/j.ejpb.2021.10.002)
3. [10.1111/jocd.70538](https://doi.org/10.1111/jocd.70538)
4. [CN122537242A](/?paper=CN122537242A&utm_source=radar&utm_medium=dashboard)
5. [CN122499062A](/?paper=CN122499062A&utm_source=radar&utm_medium=dashboard)
6. [CN121868154A](/?paper=CN121868154A&utm_source=radar&utm_medium=dashboard)
7. [sunjinbs.com](https://sunjinbs.com/make-sun-care-as-lightweight-as-skincare-with-our-patented-sunsil-uv-capsule)

### The regulatory pressure is on the old filters, and enforcement is uneven
France has proposed an EU-wide restriction of octocrylene at 0.001%, a concentration at which it stops working as a filter. Benzophenone-3 is already capped at 2.2% in body products in the EU, and the FDA has removed PABA and trolamine salicylate from its sunscreen list. Enforcement lags the rules. Guam's import ban does not cover retail sale, leaving its health department without clear authority to penalise it; Maui County's ordinance drew brand-led beach campaigns rather than enforcement; and Hawaii's 2026 session declined to widen its ban because the approved alternative supply is too thin. Holland & Barrett banned the two named filters across its stores on its own.


### The commitment is to work around the filter list, not to expand it
The two lines of work that would add a new filter molecule have produced nothing a consumer can buy, and the one genuinely new filter of the window arrived through a regulatory order rather than through that chemistry. The effort has gone instead into the vehicle, the model that predicts it, and the supply chain around the filters already approved. That is a commitment to a fixed filter list, and it is the organising decision behind most of what follows.


### Inorganic and organic filters are being built into one particle
A distinct line puts the mineral and the organic filter in the same particle rather than blending them. One filing pairs triethoxyoctylsilane-modified zinc oxide with modified silica to make the surface hydrophobic enough to resist sweat and seawater, alongside a five-filter organic blend. Another covalently bonds titanium dioxide to a lignin-cyclodextrin-aloe complex, using the lignin framework for UVA absorption while the coating suppresses the dioxide's photocatalytic activity. A third builds a photostable enhancement system from photostable agents plus surface-coated inorganic nanoparticles, and disperses nano-zinc oxide modified with polyhydroxystearic acid. Kolmar Korea reports a hybrid composite that encapsulates inorganic particles in organic components, with roughly 25% better long-UVA blocking in clinical testing. The caution sits in separate work: zinc oxide combined with organic filters has been found to accelerate their photodegradation, with the degraded mixtures more toxic in zebrafish assays, and photocatalytic oxidation has been measured when it is combined with two filters marketed as reef safe. The composites are built to close the gaps between the two filter classes; the photodegradation evidence is the cost that construction has to manage.


### The next filters are years away, so the near-term market is fixed
Bemotrizinol is the first new sunscreen active the FDA has added in decades, and the queue behind it is thin. Bisoctrizole, DHHB and Mexoryl 400 have been used in Europe and Asia for years but remain years from US approval. Brands work with the filters they already have, and the launches that followed the approval pair the new filter with old ones because the 6% cap forces combinations. The competitive space is the vehicle and the blend, not the active.


### Filter suppliers are committing to own the design layer, not just the molecule
DSM gives its optimizer away alongside its Parsol range and BASF does the same with D'lite for its own portfolio, so a formulator who designs with a supplier's model designs inside that supplier's filter set. Shiseido's platform rests on more than 500,000 data points and Kolmar's on 36 years of its own records. The commitment is to the formulation dataset as the competitive asset, which is a different thing to own than a molecule.


### The film is engineered, not just the formula
Water and sweat resistance is built as a film. One filing combines polysiloxane-15, dextrin palmitate, trimethylsiloxysilicate, a VP/hexadecene copolymer and sunflower seed oil unsaponifiables into a single waterproof film-forming system, and reports protection and water resistance surviving immersion. Another dissolves a silane film-forming polymer in the oil phase so that it integrates the oil and solid phases into a three-dimensional network, reaching an in vitro SPF of at least 50 at 1 mg/cm². The film is also being modelled: BASF's filings treat the applied layer as a gamma distribution rather than a uniform thickness, adapting the shape parameter to the formulation type so that uneven application is inside the prediction.


### Reef-safe is a claim the evidence does not support
Zinc oxide, the substitute the bans push formulators toward, has its own coral toxicity literature, and in a Maldives tank experiment a zinc oxide product labelled reef-safe caused 96% tissue loss in two hard coral species while the chemical-filter products caused mild or no effects. About 80% of reef-safe products surveyed contained inorganic filters, and the terms are unregulated marketing language. The EU is scoping its Cosmetics Regulation revision to account for combination effects between chemicals in a product.


## Overview


The whole of this landscape turns on one decision the industry has already made: the list of approved UV filters is treated as fixed, and the competition has moved to everything around the molecule. The one genuinely new filter of the window, bemotrizinol, came from an FDA monograph order in June 2026. It is the first new US sunscreen active since the late 1990s, and the queue behind it is years away. The chemistry that has spent a decade trying to replace avobenzone has produced candidates and no product. A brand that wants better protection this year cannot wait for the next molecule, so it reformulates with what exists and changes the vehicle instead.


## Research

### Formulation knowledge has become software
The prediction layer is the newest engineering and the one with the clearest commercial form. BASF and Cambridge filed on machine-learning prediction of in vivo SPF and in vitro UVA-PF from formulation features including viscosity, emollient polarity and the ratios between filter types. BASF also filed on Pareto optimisation of filter composition against several objectives at once, with an interface for exploring the trade-off, and DSM filed on the same optimisation problem. Safety is moving the same way: a Chinese cosmetics company filed a physiologically based pharmacokinetic model that predicts filter concentration in skin, liver, kidney and fat over time under different use scenarios, and a university filed a machine-learning method that identifies sunscreen ingredients from their ultraviolet spectra in about 30 minutes rather than by chromatography. The simulators are deployed: BASF runs D'lite and DSM has offered its optimizer online since 2017.


### The synthesis line is process engineering for filters already approved
A separate line makes the existing molecules better rather than making new ones, and it is run almost entirely by Chinese specialty and fine-chemical producers. The work is on yield, purity, waste and cost. A BEMT process replaces free aluminium trichloride with a recoverable supported solid acid catalyst and uses a eutectic solvent to steer the etherification, reporting chromatographic purity up to 99.5% and total yield up to 92.3%. An octocrylene route reaches at least 99% purity while eliminating intermediate crystallization, and an octinoxate route claims 100% atom economy and yields above 95%. Others cover DHHB, process control for the same molecule by HPLC, a route to the filter MCE400, and a green ion-exchange catalyst for octinoxate. The absence is on the public side: the firms filing these routes have said nothing publicly about them.


### Bio-based actives are engineered as boosters and stabilisers
Where a biological material is engineered into a product, it is built to raise or protect someone else's number. Symrise's mycosporine-like amino acid analogues are the most developed: adding one at 1% to an oil-in-water emulsion with zinc oxide raised in vitro SPF from 42.8 to 51.0 and extended critical wavelength, and companion filings claim the compounds as photostabilisers for a photo-unstable filter and as SPF and UVA boosters alongside organic filters. The supply side is being engineered too: a university filed transgenic bacteria carrying mycosporine genes from an alga, producing porphyra-334 by fermentation to avoid extracting it from natural algae, and an algae extract containing mycosporine-like amino acids and antioxidants is claimed as a sunscreen synergist. The mineral line follows the same logic. Iron-doped hydroxyapatite isolated from sardine bone absorbs from 267 to 650 nm and is formulated as a cream, and a process takes hydroxyapatite from fish-bone waste, optionally modified with zinc, titanium or silver, into particles that reflect more UVA and UVB than zinc oxide. The pattern is consistent: the commercial bio-based products are standardised fractions sold to raise a measured SPF, while the literature's materials are whole extracts whose content moves with species, season and site.


### Safety endpoints have been turned into filter-selection rules
Two biological endpoints have been built into how filters are chosen. The first is ecotoxicity. BASF's method family scores each filter on biodegradation, bioaccumulation, acute and chronic aquatic toxicity, terrestrial toxicity and sediment toxicity, sums the scores weighted by concentration, and returns a single ecotoxicological value for the finished formulation. The only filing proposing a different kind of product is a sunscreen carrying alkalinity-enhancing minerals intended to buffer local ocean acidification. The second endpoint is the skin microbiome, and here two suppliers claim the same ground with opposite definitions. BASF pairs DHHB with a triazine and says the pair keeps more skin microorganisms alive under UV, and its filing states the composition preferably excludes zinc compounds as harmful to the microbial population. DSM claims octocrylene, avobenzone and ethylhexyl triazone selectively protect Lactobacillus crispatus, and a companion filing uses a different filter set to suppress Cutibacterium acnes while protecting Staphylococcus epidermidis. The only clinical study in the line is a ten-woman pilot that comes from DSM itself.


### Protection is being built into the substrate
In the adjacent formats, the engineering moves the absorber off the surface and into the material. A weaving process produces a double-sided, two-colour fabric with sunscreen agents or sunscreen fibres worked into the structure, so protection does not have to be applied and reapplied. The lens filings put the absorber inside the resin or a sealed layer rather than on the surface: a benzotriazole sunscreen is mixed into the lens resin at 1 to 3 parts per 100, and a blue-light film carries its benzotriazole UV blocker in the silicone adhesive layer between an inorganic thin film and the base. A contact lens is built to block 400 to 500 nm while transmitting violet light from 360 to 400 nm. The lens filings each come from a different organisation, so little here builds on anything else. The durability evidence that would settle the approach exists but sits elsewhere: bisoctrizole embedded in room-temperature-vulcanising silicone at 1% and 2% held its absorption through 100 and 200 hours of artificial weathering, and nothing in the suncare work has carried that result back into a sunscreen film.


### Hair and children's formats are solved by delivery
Where the format changes, the filter does not. Hair work splits into keeping an absorber on the shaft and deciding what it should be. A Sun Yat-sen University filing loads octocrylene into particles derived from hair, 600 to 1200 nm long, and uses their size for high skin retention and negligible dermal penetration. Other filings reach the same end through oil phases and silicone films: a water-oil two-phase composition pairs a water-phase absorber with a silicone blend that forms a film to hold dye and scale, a hair oil carries ethylhexyl triazone and BEMT without emulsifiers or preservatives, and a care composition pairs basil leaf extract with polysiloxane-15. Children's products are solved the same way. No children's filing introduces a new filter: the work is encapsulated organic filters, Pickering stabilisation instead of emulsifiers, surface-treated flaky zinc oxide, a titanium dioxide and silica composite, and non-nano physical agents in a water-in-oil emulsion.


### The new-molecule line has produced candidates, not products
The work that tries to expand the filter list itself stays in the laboratory. Benzoxazole derivatives reach in vitro SPF around 40, a later series absorbs UVA, UVB and blue light with in vitro SPF above 45, chalcones show moderate SPF with one staying structurally intact through 72 hours of continuous UVA, and calix[4]resorcinarene cinnamates reach in vitro SPF 67 to 71. Every one is a single compound, measured in vitro, by an academic group, and none appears in a product. The environmental filings propose no replacement molecule either, only a method for ranking the ones already approved.


## Market

### The claims on the shelf run ahead of the evidence behind them
Neutrogena says its bemotrizinol formulas give 1.5 times higher UVA protection than standard US sunscreens, a company claim its public product pages do not substantiate. "Microbiome-friendly" is claimed by two suppliers with opposite filter definitions, and the only clinical study in the line is a ten-woman pilot from one of them. Boosters such as butyloctyl and tridecyl salicylate are listed as inactive ingredients but behave like filters, adding 10 to 30 SPF points without appearing on the filter list. Dove's "Hair Protection Factor 70" is a marketing term.


### The adjacent formats are real markets with regulatory teeth
UV-protective clothing is a regulated category: in the EU a garment claiming sun protection must be CE-marked, tested to EN 13758 and reach UPF 40 or higher; Australia labels through ARPANSA; and the Skin Cancer Foundation requires UPF 50. The weakness is durability, since chemical treatments wash out after 20 to 30 washes. Blue-light-blocking eyewear is a large market on contested benefit. Children's sunscreen is the most regulated format, with the FDA considering only zinc oxide and titanium dioxide safe for children aged 6 months to 2 years.


## Strategy

### The new filter's exclusivity window is a supply-position bet
DSM holds an 18-month US exclusivity on bemotrizinol and BASF a co-exclusive licence for the same period, so for that window the molecule is held by two suppliers and the competitive activity moves to the parts of the formula that are not exclusive. Inolex launched a solubiliser sold specifically on stabilising the new filter within weeks of approval, and Sunjin and Symrise sell the surrounding capsules and blends. The commitment is to the delivery system that surrounds someone else's exclusive molecule.


### Bio-based ingredient houses are committed to the booster position
The bio-based materials that reached shelves are sold as boosters and stabilisers, not filters: a rice-bran ferulic acid, a lignin grade, a hydroxyapatite. Being a booster sidesteps the five-to-seven-year approval a new filter faces, which is why the fastest route to a shelf for a bio-based material is to raise someone else's number. The commitment is to that position, and it carries a structural weakness: a booster is not on the positive list, so no regulation protects it and the buyer can switch.


### In the adjacent formats, companies are committing to the substrate
Where protection leaves the sunscreen bottle, the effort goes into building it into the material rather than applying it as a coating that washes or wears off. Kolmar Korea has developed a dedicated scalp sunscreen and a photoprotective hair composition, Naked Sundays launched hair and scalp SPF products, and Unilever's Dove range markets a Hair Protection Factor. The commitment is to the substrate and to the durability test that proves protection survives use, which is a testing capability rather than a chemistry one.


### The synthesis line is committed to process, and its value is set upstream
Chinese specialty and fine-chemical producers are committing to yield, purity and cost for filters that are already off-patent, and the firms filing these routes have said nothing publicly about them. That work is real, but the value of the molecule they make is set by the two firms holding the US rights to the new filter and by whoever owns the carrier it goes into. One producer told its investors that demand for the new molecule and its contribution to results are uncertain because both depend on customers' formulation timelines.


### Suppliers are staking out private environmental standards as the legal room narrows
Suppliers have built scoring methods that rank filters and return a single environmental value for a formulation, designed to be shown to consumers as a logo. The EU's Empowering Consumers for the Green Transition Directive, applying from 27 September 2026, prohibits generic environmental claims unless the trader can demonstrate recognised excellent environmental performance, and requires any sustainability label to rest on a certification scheme with third-party monitoring or to be established by a public authority. The commitment to a private standard is being made just as the law narrows the room to make it.


### Capital is consolidating around brands with a protection story
Puig agreed to buy Isdin outright for EUR 900 million plus a USD 346 million deferred payment, and suncare was worth USD 18 billion in 2025, up 58% since 2020. The commitment is to owning the brand and the claim rather than the molecule, and demand remains the weak link: roughly 32% of UK adults use sunscreen regularly.


## Areas

- Core Formulation & Efficacy · 2,593 documents
- Natural & Bio-Based Actives · 1,421 documents
- Safety & Environmental Impact · 124 documents
- Next-Generation UV Filters · 119 documents
- Adjacent Application Formats · 120 documents