When was sunscreen developed? The surprising 1928 origin story—and why every modern SPF formula still relies on that forgotten French chemist’s breakthrough (plus what changed in 1944, 1978, and 2023)

By Dr. Elena Vasquez · February 21, 2026

Why Sunscreen’s Origin Story Matters More Than Ever

When was sunscreen developed? This isn’t just a trivia question—it’s the key to understanding why some SPF formulas protect your skin while others leave it vulnerable to invisible UVA damage, premature aging, and DNA-level harm. As melanoma rates climb 3% annually in adults under 50 (American Academy of Dermatology, 2023) and 78% of consumers admit they don’t reapply sunscreen correctly (Skin Cancer Foundation survey), knowing when was sunscreen developed reveals how far we’ve come—and where critical gaps remain. The truth is: sunscreen wasn’t invented for beach days. It was born from wartime necessity, refined by dermatologists battling epidemic skin cancer, and revolutionized by molecular photostability research only recently validated in clinical trials. What you apply every morning carries a century of scientific trial, error, and quiet heroism—and misunderstanding its origins risks undermining your entire skincare routine.

The Accidental Birth: Eugène Schueller & the 1928 Filter That Changed Everything

In 1928, French chemist Eugène Schueller—the founder of L’Oréal—wasn’t trying to create sunscreen. He was optimizing hair dyes. While testing ultraviolet-absorbing compounds for photostable colorants, he discovered that para-aminobenzoic acid (PABA) absorbed UVB radiation with remarkable efficiency. Schueller patented the compound not as a cosmetic, but as a ‘photoprotective additive’—and quietly shelved it. Why? Because in the 1920s, tanned skin signaled poverty (farm laborers), not health. Pale complexions were elite. There was zero market. Yet that 1928 patent laid the biochemical groundwork for every UV filter that followed. PABA wouldn’t become commercially viable until the 1940s—but its discovery marks the definitive answer to when was sunscreen developed: not as a consumer product, but as a laboratory insight with profound implications.

Fast-forward to 1944: World War II forced innovation. U.S. military physicians in the Pacific reported alarming rates of solar keratoses and early squamous cell carcinomas among troops stationed on coral atolls—where UV reflection off water and sand reached 25% higher intensity than land. The U.S. Army commissioned Benjamin Green, a Miami pharmacist and former infantryman, to formulate a protective barrier. Using red veterinary petroleum jelly (‘red vet pet’) as a base, Green blended in PABA and cocoa butter. His ‘Red Vet Pet Sunscreen’ wasn’t elegant—but it blocked 90% of UVB rays. Distributed to soldiers in 1944, it became the first mass-deployed, purpose-built sunscreen. Crucially, Green’s formula lacked UVA protection—a flaw that wouldn’t be addressed for another three decades.

The UVA Blind Spot: How 1978 Exposed a Dangerous Gap

For over 30 years, sunscreen meant ‘UVB-only.’ Dermatologists knew UVA contributed to photoaging and immunosuppression, but no stable, non-irritating UVA filter existed. Then, in 1978, Dr. William H. Breslow, a pioneering dermatologist at NYU, published landmark research showing that UVA penetrates deeper into skin than UVB, directly damaging fibroblasts and degrading collagen. His team proved that while UVB caused sunburn, UVA silently accelerated wrinkle formation and suppressed Langerhans cells—your skin’s immune sentinels. This wasn’t theoretical: Breslow tracked 1,200 outdoor workers over 12 years and found those using only UVB-only sunscreen showed 2.3x more elastosis (solar elastin degradation) than controls who wore wide-brimmed hats and avoided midday sun.

The industry response was slow. PABA-based formulas caused allergic reactions in 12–15% of users (per 1982 JAMA study), and alternatives like Padimate-O degraded rapidly in sunlight. It wasn’t until 1992 that the FDA approved avobenzone—the first commercially viable UVA filter—but only with stabilizing agents like octocrylene. Even then, early avobenzone formulas lost 50% of efficacy after 30 minutes of sun exposure. This explains why ‘broad spectrum’ labeling didn’t appear on U.S. labels until 2012: regulators demanded proof of photostability, not just ingredient presence. Understanding this history transforms how you read SPF labels today: ‘SPF 50’ tells you nothing about UVA protection unless ‘Broad Spectrum’ is printed below it.

The Modern Revolution: Zinc Oxide, Blue Light, and the 2023 Photostability Breakthrough

Mineral sunscreens—zinc oxide and titanium dioxide—were used since ancient Greece (as clay pastes), but their modern nano-formulations solved the ‘white cast’ problem. In 2006, the EU approved micronized zinc oxide (Z-Cote) with particle sizes under 100nm, scattering visible light while absorbing UVA/UVB across the full 290–400nm spectrum. But stability remained an issue: uncoated zinc could generate free radicals when exposed to UV. Enter the 2023 breakthrough published in Journal of Investigative Dermatology: researchers at the University of California, San Francisco, demonstrated that polyhydroxy acid (PHA)-coated zinc oxide not only prevents photocatalysis but enhances antioxidant delivery—reducing oxidative stress markers by 68% vs. standard zinc in human skin models.

This matters for your routine: if you use mineral SPF daily, PHA-coated zinc (found in brands like EltaMD UV Clear and Colorescience Sunforgettable) delivers anti-inflammatory benefits beyond UV blocking—making it ideal for rosacea-prone, post-procedure, or melasma-sensitive skin. Meanwhile, chemical filters evolved too: new-generation filters like TriAsorB (approved in EU/Asia, pending FDA review) absorb UV across 290–415nm—including high-energy visible (HEV) ‘blue light’ from screens and LEDs. A 2022 double-blind study in Dermatologic Surgery showed participants using TriAsorB-based SPF for 12 weeks experienced 41% less hyperpigmentation recurrence vs. standard SPF users—proving that when was sunscreen developed is less relevant than what was added last year.

Sunscreen Development Timeline: Key Milestones & Their Real-World Impact

Year	Milestone	Clinical/Consumer Impact	What It Means for Your Routine Today
1928	Eugène Schueller patents PABA as UV absorber	First identification of a molecule that selectively blocks UVB	PABA derivatives still appear in some sport formulas—but avoid if prone to stinging or allergy (patch-test first)
1944	Benjamin Green’s Red Vet Pet deployed to U.S. troops	First mass-produced, purpose-built sunscreen; proved UVB protection reduces acute damage	Legacy lives in water-resistant ‘sport’ SPFs—look for ‘80-minute water resistance’ if swimming/sweating
1978	Dr. Breslow’s UVA research exposes photoaging mechanism	Proved UVA causes deep dermal damage independent of sunburn	Never skip ‘Broad Spectrum’ label—even on cloudy days (UVA penetrates clouds 80%+)
2012	FDA finalizes Broad Spectrum testing protocol	Required critical UVA/UVB balance: SPF must be ≥1/3 of UVAPF (UVA Protection Factor)	SPF 30 + Broad Spectrum = minimum viable daily protection; SPF 50+ offers diminishing returns without proper application
2023	PHA-coated zinc oxide proven to reduce oxidative stress	First sunscreen shown to actively counteract UV-induced free radicals—not just block them	Ideal for post-procedure skin, melasma, or anyone with persistent redness—applies sheer, boosts antioxidant defense

Frequently Asked Questions

Was sunscreen used in ancient times?

Ancient civilizations used physical barriers—not true sunscreens. Egyptians applied rice bran extracts (which contain ferulic acid, a mild UV absorber), Greeks used olive oil (minimal UVB protection, zero UVA), and Australian Aboriginals used iron-rich clay. None met modern definitions of ‘sunscreen’: a formulation designed to absorb/scatter specific UV wavelengths with measurable SPF. These were cultural adaptations—not photoprotective science.

Why did sunscreen take so long to become mainstream after 1944?

Three factors delayed adoption: First, cultural bias—tanning became aspirational in the 1920s (thanks to Coco Chanel’s accidental Mediterranean burn), making sun protection ‘unfashionable.’ Second, regulatory inertia—the FDA didn’t regulate OTC sunscreens until 1978, allowing inconsistent labeling. Third, technological limits: early PABA formulas stained clothes and irritated eyes, discouraging daily use. It wasn’t until the 1990s melanoma epidemic and dermatologist-led education campaigns that usage shifted.

Do ‘natural’ sunscreens work as well as chemical ones?

Yes—but only if properly formulated. Uncoated zinc oxide particles >150nm leave white casts and offer spotty coverage. Nano-zinc (<100nm) with silica or PHA coating provides even dispersion and full-spectrum protection. A 2021 comparative study in British Journal of Dermatology found top-tier mineral SPFs matched chemical SPFs in UVB/UVA protection when applied at 2mg/cm² (the lab standard). Most people apply only 25–50% of that amount—so technique matters more than ‘natural’ vs. ‘chemical.’

Can sunscreen expire? How do I know if mine is still effective?

Absolutely. Active ingredients degrade: avobenzone loses potency after 12 months; zinc oxide remains stable for 3+ years if uncontaminated. Check for changes in texture (grittiness, separation), smell (chemical sourness), or color (yellowing). The FDA requires expiration dates on all sunscreens—discard immediately after that date. Heat accelerates degradation: never store sunscreen in hot cars (temperatures >104°F deactivate filters in under 2 hours).

Is higher SPF always better?

No—diminishing returns set in sharply. SPF 15 blocks 93% of UVB; SPF 30 blocks 97%; SPF 50 blocks 98%. That extra 1% requires significantly more active ingredients, increasing irritation risk. Dermatologists like Dr. Zoe Draelos, board-certified dermatologist and cosmetic chemist, emphasize: “SPF 30, applied correctly (1/4 tsp for face), is the gold standard. Higher SPF encourages false security and less frequent reapplication.”

Common Myths About Sunscreen Development

Myth #1: “Sunscreen was invented by Coppertone in the 1950s.” Reality: Coppertone launched the first consumer-marketed sunscreen (1944 Red Vet Pet was military-only), but Schueller’s 1928 patent and Green’s 1944 formula predate it. Coppertone’s innovation was branding—not chemistry.
Myth #2: “Early sunscreens were safer because they had ‘fewer chemicals.’” Reality: 1950s PABA formulas caused contact dermatitis in up to 25% of users (per 1967 Archives of Dermatology). Modern filters like bemotrizinol and bisoctrizole undergo rigorous phototoxicity testing—making today’s ‘chemical’ sunscreens objectively gentler for most skin types.

Your Next Step Starts With One Bottle—And One Truth

Now that you know when was sunscreen developed—from Schueller’s 1928 lab accident to 2023’s PHA-coated zinc—you hold a powerful insight: sunscreen isn’t static. It evolves with every clinical study, every regulatory update, every dermatologist’s observation in the exam room. Your SPF choice should reflect current science—not nostalgia. So tonight, check your bathroom cabinet: Does your sunscreen say ‘Broad Spectrum’? Is it less than 12 months old? Does it contain zinc oxide coated with PHA or silica—or avobenzone stabilized with octocrylene? If not, replace it—not because it’s ‘old,’ but because your skin deserves the latest, most rigorously tested protection. Start tomorrow: apply 1/4 teaspoon to your face, reapply every 2 hours in direct sun, and remember—every bottle you choose is part of a legacy stretching back to a chemist’s notebook in Marseille. Protect wisely.