Kiehl's vs SkinCeuticals — side by side, no bias.
Our pick
C E Ferulic
9.2/10 · SkinCeuticals
| Retinol Skin-Renewing Daily Micro-Dose Serum | C E Ferulic | |
|---|---|---|
| Brand | Kiehl's | SkinCeuticals |
| Category | serum | serum |
| Editor Rating | 8.3/10 | 9.2/10 ★ |
| Category | serum | serum |
| Texture | Lightweight serum | Thin golden serum |
| Finish | Smooth, renewed | Absorbed slightly tacky |
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| Verdict | Kiehl's micro-dose retinol releases retinol gradually over 24 hours — the L'Oréal-owned apothecary brand's solution to the retinol irritation problem. Instead of one concentrated burst that causes flaking, the time-release technology delivers retinol continuously at a lower peak concentration. Ceramide NP protects the barrier while retinol challenges it. Peptides signal collagen production. A sophisticated retinol delivery system from a brand that's been in apothecary since 1851. | The benchmark vitamin C serum the entire industry measures itself against. 15% L-ascorbic acid + 1% vitamin E + 0.5% ferulic acid — the Duke University antioxidant patent that spawned a thousand dupes. $182 is painful, but the 20-year clinical dataset on photoaging reversal is unmatched. Every derm office in America has a bottle on the shelf. |
