Which scores higher with the experts?
Paula's Choice 10% Azelaic Acid Booster holds a Guru Score of 75%, ahead of The Ordinary Hyaluronic Acid 2% + B5 at 70%. The first draws on 19 independent expert reviews, the second on 15. On the experts' own numbers that puts 10% Azelaic Acid Booster in Approved territory and Hyaluronic Acid 2% + B5 in Mixed.
What do the experts say about 10% Azelaic Acid Booster?
Paula's Choice 10% Azelaic Acid Booster carries a Guru Score of 75% from 19 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.
What do the experts say about Hyaluronic Acid 2% + B5?
The Ordinary Hyaluronic Acid 2% + B5 carries a Guru Score of 70% from 15 independent experts. The reformulated version earns consistent praise for how it blends smoothly with other products in a routine, a marked improvement over the original formula that would foam and clash with moisturizers and sunscreen. Most gurus highlight its texture-evening effect and affordability, though one notes it may not feel deeply hydrating on its own. One expert cautions that using a separate hyaluronic acid serum on top of products already containing it risks overdoing it; if you do use this one, apply it to damp skin and follow with a moisturizer to lock in the hydration.
Which should you choose?
On the experts' scores Paula's Choice 10% Azelaic Acid Booster comes out ahead, 75% to 70%, a gap of 5 points. It has 19 experts behind it against 15 for The Ordinary Hyaluronic Acid 2% + B5. 10% Azelaic Acid Booster is most often recommended for sensitive and acne-prone skin, Hyaluronic Acid 2% + B5 for dry and mature. Both are independently verified on the Guru Index, so either is a sound pick; let the use case and your budget settle it.