iS Clinical vs SkinCeuticals — side by side, no bias.
Our pick
C E Ferulic
9.2/10 · SkinCeuticals
| Active Serum | C E Ferulic | |
|---|---|---|
| Brand | iS Clinical | SkinCeuticals |
| Category | serum | serum |
| Editor Rating | 8.8/10 | 9.2/10 ★ |
| Category | serum | serum |
| Texture | Lightweight serum | Thin golden serum |
| Finish | Velvet | Absorbed slightly tacky |
| Skin Types |
| Targets |
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| Verdict | iS Clinical's hero product and the formulation that built the brand. A botanical multi-acid serum: mandelic acid (gentle AHA, suits sensitive skin), salicylic acid (BHA, acne-targeted), L-ascorbic acid (vitamin C, brightening), arbutin (tyrosinase inhibitor for pigmentation), bilberry + sugar cane + lemon + orange + maple extracts (multi-source AHA/BHA). The breadth is the differentiator: this serum addresses acne, hyperpigmentation, and early aging in a single application — which is why dermatologist offices stock it as the all-in-one cosmeceutical entry point. | 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. |
