Which scores higher with the experts?
The Ordinary Multi-Peptide + Copper Peptides 1% Serum holds a Guru Score of 89%, ahead of Paula's Choice 10% Azelaic Acid Booster at 81%. The first draws on 22 independent expert reviews, the second on 21. On the experts' own numbers that puts Multi-Peptide + Copper Peptides 1% Serum in Yay territory and 10% Azelaic Acid Booster in Yay.
What do the experts say about Multi-Peptide + Copper Peptides 1% Serum?
The Ordinary Multi-Peptide + Copper Peptides 1% Serum carries a Guru Score of 89% from 22 independent experts. The serum's texture and hydration earn consistent praise, it absorbs smoothly without greasiness and delivers noticeable moisture to dehydrated skin. Most gurus highlight the value of multiple peptide types (copper for repair, Matrixyl for signaling, Argireline for expression lines) at a low price, though a few note that the copper peptide concentration may not deliver the deep tightening effect some expect, and results tend toward hydration and subtle smoothing rather than dramatic firming. A small number found minimal visible change or mild irritation on their skin, so patch-testing makes sense if you have sensitive skin or use other active ingredients alongside it.
What do the experts say about 10% Azelaic Acid Booster?
Paula's Choice 10% Azelaic Acid Booster carries a Guru Score of 81% from 21 independent experts. The formula layers beautifully and doesn't pill for most people, earning praise for its elegant texture compared to grittier azelaic acid options. Gurus consistently highlight its range: it tackles redness, acne, post-inflammatory hyperpigmentation, and even rosacea, and remains safe in pregnancy when azelaic acid alone is the concern (though the added salicylic acid introduces caution). The one genuine caveat is that azelaic acid can pill and feel less cosmetically refined, so applying it at night rather than morning works best; a few people also found the salicylic acid eventually felt like too much exfoliation alongside other actives like tretinoin, so those already using strong retinoids may want to ease in slowly or use it just once or twice a week.
Which should you choose?
On the experts' scores The Ordinary Multi-Peptide + Copper Peptides 1% Serum comes out ahead, 89% to 81%, a gap of 8 points. It has 22 experts behind it against 21 for Paula's Choice 10% Azelaic Acid Booster. Multi-Peptide + Copper Peptides 1% Serum is most often recommended for mature skin, 10% Azelaic Acid Booster for 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.