CKD Guaranteed
CKD Guaranteed is a Korean beauty brand leaning into anti-aging actives, with its Retino Collagen line of masks, ampoules, and serums built around niacinamide, retinoid, peptide, and vitamin C. The focus on lifting, tightening, and pumping formulas — plus tools like a guasha lifting serum — points to a firming, renewal-minded positioning. It suits those wanting a more concentrated, treatment-style approach to skin aging.
6 products · often uses Niacinamide, Retinoid, Peptide · $8–$32
6 products
What stands out about CKD Guaranteed
Everything here is measured against all 2,068 products in our guide — “uses centella” means nothing on its own when 13% of Korean skincare does.
- Niacinamide — in 5 of 6, about 3.1× as often as the catalogue average.
- Reviewers single it out for brightening — 34% of review answers across 5 products, against 15% typical.
- Most-read product — CKD Retino Collagen Small Molecule 300 Pore Tightening Mask Sheet 4+1 Special Set, 152 international reviews.
All 6 CKD Guaranteed products
About CKD Guaranteed
- What does CKD Guaranteed make?
- 6 products in our guide, most of them in the mask & pads, sunscreen and essence / serum steps — the formulas most often carry Niacinamide, Retinoid, Peptide. Prices run about $8 to $32.
- Is CKD Guaranteed fragrance-free?
- None of the 6 we checked are. Every one lists fragrance, essential oil or a declared allergen, so if you react to fragrance this is not the brand to start with.
- Where can I buy CKD Guaranteed?
- 5 of 6 are listed on Olive Young Global, which ships internationally. The other 1 can only be bought in Korea.