Side-by-side comparison

ISDIN Eryfotona Actinica SPF 50+ vs Round Lab Birch Juice Moisturizing Sunscreen SPF 50+

Both are sunscreens. They share a 99% active-ingredient overlap, so the real decision is about price, texture and the supporting ingredients. Here's the side-by-side.

99%Active overlap
ISDIN
Eryfotona Actinica SPF 50+
SunscreenPremiumMorning only
protectAgingsensitive

100% mineral (zinc oxide) SPF 50+ with photolyase enzymes shown to support repair of UV-induced DNA damage. Used in actinic-keratosis prevention protocols — among the best-evidenced mineral daily SPFs on the market.

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Round Lab
Birch Juice Moisturizing Sunscreen SPF 50+
SunscreenBudgetMorning only
protectDamaged Barrier

A hydrating chemical SPF with birch juice as the primary base (replacing water in the formula). Light, comfortable finish; hydrating without being greasy. One of the go-to affordable K-beauty daily sunscreens.

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The verdict

Which should you choose?

On price, the Round Lab Birch Juice Moisturizing Sunscreen SPF 50+ sits in the Budget tier versus Premium for the ISDIN — so it's the more budget-led pick if the overlap is what you're after. The ISDIN leans toward Aging, sensitive. The Round Lab leans toward Damaged Barrier.

The overlap

What they share

At 99% active overlap, these are the ingredients doing comparable work in both formulas:

Spf / Sunscreen
The formulation

Ingredient stacks, side by side

ISDIN — top of the list

  • Aqua (Water)~50–80%
  • Zinc Oxide~5–25%
  • Propanediol~3–10%
  • Caprylic/Capri…~2–6%
  • Isopropyl Palm…~1.5–4%
  • Pentylene Glycol~1–2%

Round Lab — top of the list

  • Betula Platyph…~50–80%
  • Butyl Methoxyd…~5–25%
  • Ethylhexyl Met…~3–10%
  • Dicaprylyl Car…~2–6%
  • Propanediol~1.5–4%
  • Glycerin~1–2%

● marks ingredients that appear near the top of both lists. Percentages are positional estimates from INCI order, not disclosed doses.

At a glance

The specs

ISDINRound Lab
CategorySunscreenSunscreen
Price tierPremiumBudget
Best forprotect, Aging, sensitiveprotect, Damaged Barrier
Usage notesMorning onlyMorning only
Active overlap99% — Spf / Sunscreen
Questions

Common questions

Is the ISDIN Eryfotona Actinica SPF 50+ or the Round Lab Birch Juice Moisturizing Sunscreen SPF 50+ better?
Neither is universally better — they share 99% active-ingredient overlap, so for the actives that drive results they're close. The Round Lab Birch Juice Moisturizing Sunscreen SPF 50+ is the more budget-friendly option, while the other may differ on texture, finish and supporting ingredients. Pick based on your skin's priorities rather than a single 'winner'.
What's the difference between the ISDIN Eryfotona Actinica SPF 50+ and the Round Lab Birch Juice Moisturizing Sunscreen SPF 50+?
Both are sunscreens that share Spf / Sunscreen. Where they differ: they sit in different price tiers (Premium vs Budget); the ISDIN targets Aging, sensitive; the Round Lab targets Damaged Barrier.
Are the ISDIN Eryfotona Actinica SPF 50+ and Round Lab Birch Juice Moisturizing Sunscreen SPF 50+ dupes for each other?
They share 99% active-ingredient overlap based on published INCI lists, so one can stand in for the other on the actives that matter — chiefly Spf / Sunscreen. A dupe matches the hero actives, not the full sensory experience, so expect differences in texture, fragrance and exact concentrations.
Can I use the ISDIN Eryfotona Actinica SPF 50+ and Round Lab Birch Juice Moisturizing Sunscreen SPF 50+ together?
They both fill the sunscreen slot in a routine, so you'd normally pick one rather than layer both. If you want to use both, treat one as your daytime option and the other for evening, and patch-test when introducing anything new.
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99% overlap

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