
ROUND LAB • Sunscreen
ROUND LAB Birch Juice Moisturizing UV LOCK SPF 45 Sunscreen, 50ml
Prices & ratings as of Oct 12, 2026 · may change anytime on Amazon & Olive Young · check the retailer for current info
ROUND LAB Birch Juice Moisturizing Sunscreen SPF45 uses birch tree sap (Betula Platyphylla Japonica Juice) to hydrate while protecting, with a lightweight, no-white-cast finish suitable for sensitive skin. Note: the Amazon "UV Lock" version is specially reformulated to meet US FDA OTC sunscreen regulations, so its exact UV filter blend differs slightly from the original Korean formula sold on Olive Young — both share the same hydrating, ultra-lightweight experience the line is known for. PACK SIZE & PRICE COMPARISON (as of oct 12, 2026): • Amazon: $34.98 for 2 tubes (~$17.49/tube), rated 4.4 (2,956 reviews) — NBC Select's #1 Facial Sunscreen pick • Olive Young: $41.60 for 3 tubes (~$13.87/tube), rated 4.9 (1,570 reviews) — 2025 Olive Young Award winner, labeled "No.1 Korean Sunscreen." Olive Young offers a lower per-tube price with an extra tube included, while Amazon includes US-compliant SPF testing and faster shipping. Always check both retailers for current pricing before purchasing.
Related guides: Sensitive Skin & Redness · Dehydration
Our picks are cosmetic product recommendations, not medical prescriptions. Some links are affiliate links — we may earn a commission at no extra cost to you.
Prices & ratings may change anytime on Amazon & Olive Young · check the retailer for current info. We may earn a commission at no cost to you.
Key ingredients
- Birch Sap
- Hyaluronic Acid
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Frequently asked
Is ROUND LAB Birch Juice Moisturizing UV LOCK SPF 45 Sunscreen, 50ml good for sensitive skin?
Yes — its formula is well tolerated by sensitive types. Patch-test first.
Where is it cheapest — Amazon or Olive Young?
Prices rotate with sales. Use the buttons above to compare current retailer prices; Olive Young often bundles minis and limited editions.
Our guides and picks are cosmetic curation for education only — not medical advice. Skin varies person to person: patch-test new products and see a dermatologist for persistent or concerning issues.