Which scores higher with the experts?
SkinCeuticals C E Ferulic holds a Guru Score of 76%, ahead of The Ordinary Azelaic Acid Emulsion 10% at 71%. The first draws on 34 independent expert reviews, the second on 23. On the experts' own numbers that puts C E Ferulic in Approved territory and Azelaic Acid Emulsion 10% in Mixed.
What do the experts say about C E Ferulic?
SkinCeuticals C E Ferulic carries a Guru Score of 76% from 34 independent experts. This serum has solid clinical backing and delivers results for those who tolerate L-ascorbic acid well, but experts genuinely split on whether the £165-185 price tag is justified now that the original patent has expired and affordable alternatives with similar formulas exist. Those with sensitive skin or darker skin tones may find the concentration irritating and should patch-test first, as L-ascorbic acid at this strength triggers redness in a significant portion of people. For normal to dry skin types who know they handle the active well, dermatologists note it remains reliable and worth keeping; for everyone else, gurus suggest exploring cheaper dupes with the same active form before committing to the premium price.
What do the experts say about Azelaic Acid Emulsion 10%?
The Ordinary Azelaic Acid Emulsion 10% carries a Guru Score of 71% from 23 independent experts. This serum stands out for staying smooth despite containing azelaic acid, which typically gets gritty in formulations. Reviewers loved the silky, creamy texture and lightweight feel, which makes it easy to layer. It delivers the standard azelaic acid benefits (calming redness, fading hyperpigmentation, clearing breakouts), and it layers well when placed a few steps into your routine rather than as a first step.
Which should you choose?
On the experts' scores SkinCeuticals C E Ferulic comes out ahead, 76% to 71%, a gap of 5 points. It has 34 experts behind it against 23 for The Ordinary Azelaic Acid Emulsion 10%. C E Ferulic is most often recommended for mature skin. Both are independently verified on the Guru Index, so either is a sound pick; let the use case and your budget settle it.