Isdin Eryfotona Actinica

Number of Ingredients

More ingredients can mean more potential irritants, but a long list is not automatically worse.

This product: 31 ingredients

Price per Ounce

This compares similar product types using the price and size listed in Airtable.

This product: $14.71 per ounce

Dermatologist’s verdict

Mixed

An excellent zinc SPF 50+ sold on a claim I would not pay extra for. Photolyase repairs ultraviolet DNA damage in the lab, but the one large independent trial found no difference against plain sunscreen. Buy it because you will actually wear it daily. It contains fragrance, so skip it if you react.

What it is

Isdin Eryfotona Actinica is a zinc-only SPF 50+ sunscreen sold mostly through dermatology offices, around $50 to $66. It is a daily sunscreen for sun-damaged skin, not a treatment for actinic keratoses, whatever the packaging suggests.

Zinc oxide at 11%, no chemical filters. The brand sells it on photolyase, a plankton enzyme that repairs one kind of ultraviolet DNA damage and is listed as a cosmetic ingredient, not an active. The silicone base is why 11% zinc leaves almost no white cast and absorbs in seconds. Fragrance is on the label, despite the medical positioning.

What it does

Ultraviolet light damages a skin cell by fusing two neighboring bases of its DNA together. The cell normally repairs that within a day; what it misses accumulates into sun damage and, over decades, actinic keratoses. Photolyase reverses that specific fusion directly, and Isdin Eryfotona Actinica adds it. The biochemistry is real.

The clinical evidence is thin. The trials are small, some uncontrolled, several brand-funded, and the headline figure is a molecular marker rather than a lesion count. The one large independent trial found no difference between sunscreen with photolyase and plain sunscreen.

The sunscreen is the proven part. Daily SPF 50+ reduces sun damage and skin cancer, and sun-damaged skin will genuinely wear this one every day. That alone justifies it. The DNA-repair layer is a promising maybe — do not pay extra for it.

What it treats

## Actinic Keratosis | Strong Ultraviolet light fuses two neighboring letters of a skin cell's DNA together. Most of that is repaired within a day; the rest builds up. An actinic keratosis is a rough patch carrying that accumulated damage. Daily SPF 50+ is proven to reduce them, and sun-damaged skin will actually wear this one every morning.

## Sun Damage (Photoaging) | Strong Zinc oxide covers UVA and UVB with one filter, and UVA is what reaches the collagen in the lower layer of skin. Dermatology offices stock this one for the finish — light enough to wear every day without thinking about it.

Best for

**Fragrance is on the label:** despite the sensitive-skin, medical-office positioning. Worth knowing if you react to fragrance.

**It costs far more than plain zinc:** around $46 for 1.7 oz, $73 for the larger size. Plain zinc sunscreen costs a fraction of that.

**The repair claim is not regulated:** photolyase is filed as a cosmetic inactive ingredient, so the DNA-repair claim is not FDA-reviewed. The sunburn-protection claim is.

**May feel heavy on oily skin:** the base is silicone-forward.

Not the best for

## Sensitive Skin | Poor fit No chemical filters, so it suits reactive and rosacea-prone skin. But fragrance is on the list, and if you react to fragrance this is the wrong bottle. Take a fragrance-free mineral fluid instead.

Texture

Lotion A fluid lotion that spreads easily, absorbs in seconds and sits well under makeup.

Very little white cast, unusual for 11% zinc and down to the silicone base. A slight cast is still possible on deeper skin tones.

It can feel heavy on oily skin. It contains fragrance and denatured alcohol, worth knowing given the medical positioning.

How to use it

## How to use it How much: A quarter teaspoon for the face. Shake first — a fluid mineral formula separates. Where: Face, ears, neck and hairline. Actinic keratoses favor the tops of the ears and the part line of the scalp, exactly where sunscreen gets skipped. Reapply: Every two hours outdoors, and after sweating or swimming. What to expect: Nothing you can see — sun protection is preventive. Photolyase will not clear patches you already have. Those need a clinic.

Full ingredient list

Active ingredients: Zinc Oxide 11%

Inactive ingredients: Water, Diethylhexyl Carbonate, Dibutyl Adipate, Cyclopentasiloxane, Dicaprylyl Carbonate, Alcohol Denat, Cyclohexasiloxane, Butylene Glycol, PEG-30 Dipolyhydroxystearate, Nylon-12, PEG-10 Dimethicone, Dimethicone, Sodium Chloride, Phenoxyethanol, Disteardimonium Hectorite, Triethoxycaprylylsilane, Tocopheryl Acetate, Glyceryl Stearate, Fragrance, Bisabolol, Disodium EDTA, Ethylhexylglycerin, Panthenol, PEG-8, Tocopherol, Lecithin, Plankton Extract, Ascorbyl Palmitate, Ascorbic Acid, Citric Acid

Price per ounce

A quarter teaspoon every morning, plus more after time outdoors. The bottle empties far faster than the price per ounce implies.

Similar products

Options if the price is hard to justify or you need fragrance-free. The daily habit matters more than the bottle.

Vanicream Facial Moisturizer SPF 30 | more | Zinc oxide only, fragrance-free, five ceramides, about $13 to $16. Visible cast on medium and deeper skin tones. La Roche-Posay Anthelios Mineral Ultra-Light Face Sunscreen | more | Fully mineral, fragrance-free, absorbs unusually well. Better if scent or alcohol irritates your skin. Tatcha The Silk Sunscreen | same | Also zinc only, with a well controlled cast and a silky feel. Contains fragrance too, at $64 for 1.7 oz.

Key facts

Key active: Zinc oxide 11% (SPF 50+) Texture: Fluid, lightweight lotion Best for: Sun-damaged skin, actinic keratoses, and anyone under a dermatologist's watch for skin cancer Approximate price: $50–66 Size: 3.4 oz Price: $73.00 Type: Sunscreen

Questions patients ask

Is Isdin Eryfotona Actinica mineral or chemical? Mineral. Zinc oxide only.

Does Isdin Eryfotona Actinica really repair DNA damage? It repairs UV lesions in the lab, but the clinical evidence for real skin benefit is weak and mostly brand-funded.

Will Isdin Eryfotona Actinica leave a white cast? Very little, though a slight cast is possible on deeper skin tones.

Is Isdin Eryfotona Actinica fragrance-free? No. Fragrance is on the label.

What SPF is Isdin Eryfotona Actinica? SPF 50+.

References

1. UV Radiation in DNA Damage and Repair Involving DNA-Photolyases and Cryptochromes (https://www.mdpi.com/2227-9059/9/11/1564) — Confirms the biochemistry is real: DNA photolyases directly repair UV-induced cyclobutane pyrimidine dimers via light-driven photoreactivation, the specific lesion type UV creates. 2. Enzymes DNA Repair in Skin Photoprotection: Strategies Counteracting Skin Cancer Development and Photoaging (https://www.mdpi.com/2079-9284/12/4/172) — Backs the mechanism that topically applied photolyase repairs UV-induced CPDs and its role in photoprotective formulations, while noting humans lack endogenous photolyase. 3. Review of Clinical Evidence over 10 Years on Prevention and Treatment of a Film-Forming Medical Device Containing Photolyase in the Management of Field Cancerization in Actinic Keratosis (https://link.springer.com/article/10.1007/s13555-019-0294-1) — Supports the cautious framing of the DNA-repair/AK claim: the photolyase medical device evidence base is mostly small, open-label studies (the review's own limitation). 4. Effect of a Photolyase-Based Medical Device on Actinic Keratosis in Phototypes III-IV Patients: Real-Life Clinical Setting (https://pmc.ncbi.nlm.nih.gov/articles/PMC12256378/) — A recent real-life clinical study of the photolyase-plus-sunscreen device reporting reduced actinic keratosis lesions, illustrating the limited (open-label, real-world) nature of the AK efficacy evidence. 5. ISDIN Eryfotona Actinica Mineral Sunscreen SPF 50+ Review — DermApproved (https://dermapproved.com/products/isdin-eryfotona-actinica-mineral-sunscreen-spf-50/) — Confirms the product-specific facts: 100% mineral formula with zinc oxide 11% as the sole active, no chemical filters, minimal white cast, and lightweight fast-absorbing texture.