COSRX • Serum
COSRX The Retinol 0.5 Oil 20ml
Prices & ratings as of Oct 7, 2026 · may change anytime on Amazon & Olive Young · check the retailer for current info
Lightweight oil serum with 0.5 percent retinol, Super Vitamin E and squalane. Helps improve the look of fine lines and firmness while supporting smooth and even-looking skin. Best for experienced retinol users with normal to dry skin. PM use only with pea-size amount, moisturizer after, and sunscreen in the morning. Patch test first.
Related guides: Anti-Aging & Fine Lines · Dehydration
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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
- Retinol
- Vitamin E
- Squalane
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Prices & ratings as of Oct 17, 2026 · may change anytime on Amazon & Olive Young · check the retailer for current info
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Frequently asked
Is COSRX The Retinol 0.5 Oil 20ml 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.