Which scores higher with the experts?
SkinCeuticals C E Ferulic holds a Guru Score of 79%, ahead of The Ordinary Azelaic Acid Suspension 10% at 72%. The first draws on 28 independent expert reviews, the second on 20. On the experts' own numbers that puts C E Ferulic in Approved territory and Azelaic Acid Suspension 10% in Mixed.
What do the experts say about C E Ferulic?
SkinCeuticals C E Ferulic carries a Guru Score of 79% from 28 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 Suspension 10%?
The Ordinary Azelaic Acid Suspension 10% carries a Guru Score of 72% from 20 independent experts. The thick, gritty texture divides users, with some finding it too heavy to stick with while others layer it successfully into their routines. Most gurus praise it as an affordable, fragrance-free option that calms redness, tackles uneven tone and acne, and suits sensitive skin and rosacea well. Apply it right after cleansing and drying, then follow with moisturizer; if you have easily irritated skin, go easy when combining it with other actives like retinol.
Which should you choose?
On the experts' scores SkinCeuticals C E Ferulic comes out ahead, 79% to 72%, a gap of 7 points. It has 28 experts behind it against 20 for The Ordinary Azelaic Acid Suspension 10%. C E Ferulic is most often recommended for mature skin, Azelaic Acid Suspension 10% for oily, sensitive and acne-prone. Both are independently verified on the Guru Index, so either is a sound pick; let the use case and your budget settle it.