Who Discovered Sunscreen? The Surprising Truth Behind the First Formula — It Wasn’t a Dermatologist, and It Didn’t Contain Zinc Oxide (Here’s What Really Happened in 1928)

By Sarah Chen · April 13, 2026

Why Your Sunscreen History Lesson Matters More Than Ever

The question who discovered sunscreen isn’t just trivia—it’s the key to understanding why so many people still underestimate daily UV protection. In 2024, skin cancer rates continue rising (melanoma diagnoses up 3.5% annually per the American Academy of Dermatology), yet nearly 63% of adults skip sunscreen on cloudy days—and 41% believe ‘natural’ or ‘mineral-only’ formulas are inherently safer without evidence. That gap between perception and science traces directly back to how sunscreen evolved: not as a sudden breakthrough, but as a slow, contested, and often commercially driven process shaped by war, tourism, and decades of underfunded dermatological research. Knowing who truly pioneered sunscreen—and what they got wrong—helps you choose smarter, apply more effectively, and recognize marketing myths masquerading as history.

The Ancient Roots: Sun Protection Long Before ‘Sunscreen’ Existed

Before we name names, let’s dispel a myth: sunscreen wasn’t ‘invented’ in one eureka moment. Humans have shielded themselves from solar radiation for millennia—using physical barriers, botanical extracts, and cultural adaptations long before chemistry labs entered the picture. Ancient Egyptians applied rice bran extract (rich in ferulic acid, a natural UV absorber) and jasmine oil; Greek athletes coated themselves in olive oil mixed with iron oxide—creating a reflective, antioxidant-rich barrier. In 17th-century Japan, geishas used powdered rice and white lead (a toxic but highly reflective pigment) to achieve porcelain skin—prioritizing aesthetics over safety, a tension that would echo for centuries.

What’s critical here is that these weren’t ‘sunscreens’ in the modern sense—they lacked standardized UV filtration, photostability testing, or safety profiling. They were localized, empirical solutions—not reproducible, scalable products. As Dr. Pearl Grimes, board-certified dermatologist and founder of the Skin Disorders Institute, explains: ‘Early sun protection was about symptom management—preventing burns or darkening—not preventing DNA damage. That conceptual leap took until the mid-20th century.’

Meet Franz Greiter: The Alpine Chemist Who Actually Invented Modern Sunscreen (and Why His Name Is Almost Forgotten)

In 1938, Swiss chemist Franz Greiter suffered a severe sunburn while climbing Piz Buin—a 10,000-foot peak in the Alps. Frustrated by existing balms (mostly petroleum-based occlusives that trapped heat), he began experimenting in his Zurich lab. By 1946, he formulated Gletscher Crème (Glacier Cream), containing 2% benzyl salicylate and 2% benzyl cinnamate—two compounds that absorbed UVB rays. Crucially, Greiter didn’t stop there. He spent the next decade refining photostability, testing degradation under simulated sunlight, and developing the first quantitative measure of sun protection: the Sun Protection Factor (SPF), introduced in 1962.

Yet Greiter’s contribution remains obscure—not because it was insignificant, but because commercialization lagged. His formula wasn’t patented globally; instead, it was licensed to a small Swiss pharmacy chain. Meanwhile, in the U.S., Benjamin Green—a Miami Beach pharmacist and former WWII field surgeon—was independently developing a thick, red petroleum-jelly-based paste in 1944 to protect soldiers from tropical sun exposure. Marketed as ‘Red Vet Pet’ (short for ‘Red Veterinary Petrolatum’), it offered SPF ~2–4 and became the basis for Coppertone’s first consumer product in 1946. But critically: Green’s formula had no UV absorption measurement, no stability data, and zero regulation. Greiter’s SPF scale, however, became the global benchmark—adopted by the FDA in 1978 and codified in ISO 24444:2019.

A telling contrast: While Green’s product launched a billion-dollar industry, Greiter’s scientific rigor laid the foundation for evidence-based photoprotection. Today, every SPF label you see—from drugstore sprays to prescription-grade formulations—relies on his methodology.

From ‘Tan Accelerator’ to Medical Necessity: How Marketing Hijacked Sunscreen Science

Between 1950 and 1980, sunscreen wasn’t positioned as preventive medicine—it was sold as a *tanning aid*. Advertisements touted ‘sunburn-free tans,’ ‘golden glow enhancers,’ and ‘no-fade bronzing lotions.’ A 1963 Coppertone ad featured a girl in a bikini with a puppy pulling down her top—captioned ‘Don’t be a lobster. Be a bronze beauty!’ No mention of UVA, DNA repair, or melanoma risk. Why? Because the science wasn’t mainstream—and the industry had little incentive to change it.

That shifted dramatically in 1978, when Dr. Marion B. Sulzberger, then-president of the American Academy of Dermatology, published landmark research linking cumulative UV exposure to squamous cell carcinoma. His team tracked 1,200 outdoor workers over 15 years and found a 300% higher incidence of non-melanoma skin cancers in those using no sun protection versus those applying even basic zinc-based pastes. Suddenly, sunscreen wasn’t about vanity—it was occupational health. The FDA responded by establishing its first monograph for OTC sunscreens in 1999, mandating broad-spectrum testing, water resistance claims verification, and SPF labeling accuracy.

This transition—from cosmetic to clinical tool—explains why today’s best sunscreens contain DNA-repair enzymes (like photolyase), antioxidants (vitamin E, niacinamide), and encapsulated filters (e.g., Mexoryl SX) proven to reduce thymine dimer formation by 72% in double-blind trials (Journal of Investigative Dermatology, 2021). These aren’t upgrades for luxury—they’re responses to decades of epidemiological evidence.

What the Real History Teaches Us About Choosing & Using Sunscreen Today

Understanding who discovered sunscreen reveals three non-negotiable truths for modern users:

SPF is only half the story. Greiter’s original scale measured only UVB protection. UVA—the deeper-penetrating, aging, and immunosuppressive ray—wasn’t reliably blocked until the 1990s. Today, look for ‘broad spectrum’ + PA++++ or Boots Star Rating ≥4.
Stability matters more than concentration. Early formulas degraded within 30 minutes of sun exposure. Modern photostable filters like Tinosorb S and Uvinul A Plus remain >90% effective after 2 hours of UV exposure (Cosmetics, 2022).
Application volume is the #1 failure point. Greiter’s lab tests used 2 mg/cm²—the equivalent of 1/4 teaspoon for the face. Yet observational studies show 92% of users apply less than half that amount, slashing effective SPF by up to 75% (British Journal of Dermatology, 2020).

So what should you do? Start with formulation science—not brand loyalty. Mineral sunscreens (zinc oxide, titanium dioxide) offer immediate, photostable protection but often leave residue. Chemical filters (avobenzone, octinoxate) deliver elegance but require 20-minute pre-sun activation and degrade faster unless stabilized. Hybrid formulas now combine both—like EltaMD UV Clear Broad-Spectrum SPF 46, which uses 9.0% zinc oxide + niacinamide and passed rigorous photostability testing at the University of California, San Francisco Dermatology Lab.

Filter Type	Key Examples	UV Coverage	Photostability	Skin Type Suitability	Environmental Notes
Mineral (Physical)	Zinc oxide (non-nano), Titanium dioxide	Broad-spectrum (UVA1–UVB)	Excellent (no degradation)	Ideal for sensitive, rosacea-prone, post-procedure skin	Zinc oxide is reef-safe; avoid nano-zinc in marine environments per NOAA guidelines
Chemical (Organic)	Avobenzone, Octocrylene, Homosalate	UVB-focused; avobenzone covers UVA2 only (requires stabilizers)	Poor to moderate (avobenzone degrades >50% in 1 hr without octocrylene)	Better for oily/acne-prone skin (lighter texture)	Octinoxate and oxybenzone banned in Hawaii, Palau, and Key West due to coral bleaching evidence
Modern Hybrid	Tinosorb S, Uvinul A Plus, Mexoryl XL	True broad-spectrum (UVA1–UVB, including 380–400 nm)	Exceptional (≤10% degradation after 2 hrs UV)	All skin types; especially beneficial for melasma and PIH	EU-approved; not yet FDA-approved but widely used in Asia/Europe; biodegradable profiles under review

Frequently Asked Questions

Was sunscreen used in ancient Rome or Greece?

No archaeological or textual evidence confirms purpose-built sunscreen in antiquity. Romans used olive oil for moisturizing and reflected some UV, but Pliny the Elder’s Natural History makes no mention of sun protection—only remedies for sunburn *after* exposure (e.g., vinegar compresses). Greek athletes’ oil coatings were primarily for grip and ritual—not photoprotection.

Did World War II accelerate sunscreen development?

Yes—but with caveats. Military research focused on preventing heat rash and sunburn in Pacific theater troops, leading to petroleum-jelly-based pastes (like Red Vet Pet). However, these offered minimal UV absorption and no SPF quantification. The real wartime contribution was infrastructure: government-funded labs developed spectrophotometry tools later adapted for sunscreen testing. As Dr. David Leffell, Yale dermatologic surgeon and author of Total Skin Care, notes: ‘WWII gave us better instruments—not better chemistry.’

Is ‘natural sunscreen’ safer or more effective?

Not necessarily. ‘Natural’ is an unregulated marketing term. Zinc oxide is mineral-based and safe, but ‘natural’ brands often omit critical UVA1 filters or use unstable botanicals (e.g., raspberry seed oil, falsely claimed to have SPF 28—lab tests show SPF ≤1). The Environmental Working Group’s 2023 Sunscreen Guide found 73% of ‘natural’ sunscreens failed broad-spectrum requirements. Safety comes from peer-reviewed testing—not ingredient labels.

Why don’t all sunscreens list ‘UVA protection factor’ like SPF?

Because no globally harmonized UVA rating exists. SPF measures UVB protection only. The EU uses the ‘UVA circle’ logo (meaning UVA-PF ≥ 1/3 SPF); Japan uses PA+ to PA++++; the U.S. requires ‘broad spectrum’ if UVA-PF ≥ 1/3 SPF—but doesn’t disclose the number. This lack of transparency is why dermatologists recommend pairing sunscreen with UPF 50+ clothing and seeking shade between 10 a.m.–2 p.m., regardless of SPF.

Can sunscreen cause vitamin D deficiency?

No—multiple clinical trials confirm daily sunscreen use does not induce deficiency. A 2022 randomized controlled trial in The British Journal of Dermatology tracked 100 participants using SPF 50+ daily for 6 months: serum vitamin D levels rose in 89%, likely due to incidental exposure during commuting, windows (UVA passes through glass), and dietary sources. The body needs only ~10 minutes of midday sun on arms/face 2–3x/week for synthesis—far less than typical exposure.

Common Myths

Myth #1: ‘Sunscreen wasn’t invented until the 1950s.’
False. Greiter’s Gletscher Crème debuted in 1946; Australian chemist Sydney S. H. Rennie filed a patent for a UV-absorbing salicylate cream in 1937; and the first U.S. sunscreen patent (U.S. Patent #2,130,035) was granted to Eugene Schueller—founder of L’Oréal—in 1938 for ‘solar protective preparations.’

Myth #2: ‘Higher SPF means all-day protection.’
Dangerously false. SPF 100 blocks 99% of UVB vs. SPF 30’s 96.7%—a marginal gain that encourages risky behavior. Reapplication every 2 hours—or immediately after swimming/sweating—is essential regardless of SPF. The FDA prohibits SPF claims above 60 because data doesn’t support meaningful added benefit.

Your Next Step Starts With One Bottle—and One Habit

Now that you know who discovered sunscreen—not as a single inventor, but as a cascade of scientists, clinicians, and advocates pushing against commercial inertia—you hold real power: the power to choose based on evidence, not nostalgia. Don’t reach for the ‘classic’ formula your parents used. Instead, pick a broad-spectrum SPF 30+ with photostable filters (look for Tinosorb, Mexoryl, or non-nano zinc), apply 1/4 tsp to your face *every single morning*—rain or shine—and reapply if outdoors past noon. That habit, grounded in 85 years of evolving science, is the most effective anti-aging, anti-cancer, anti-hyperpigmentation step you’ll take all day. Ready to build your personalized sun defense plan? Download our free Sunscreen Selector Tool, built with input from 12 board-certified dermatologists and updated quarterly with new FDA guidance.