Why It’s Important to Use a Hyaluronic Acid Serum

Emma Caldwell
May 10, 2026

Hydration, plumping effect, radiance… Probably these are the best-known benefits of hyaluronic acid, a widely used ingredient in cosmetics that many turn to regardless of age or season. But what exactly is special about it and why is it so essential?

Hyaluronic acid is acclaimed for a unique capacity in nature: it can retain up to 1,000 times its weight in water. It is, essentially, a molecular “sponge” that our skin naturally produces to stay hydrated, flexible, and with a healthy appearance. In other words, a very good ally to maintain the skin’s well-being.

As you may know, with the passage of time, its production declines, promoting the appearance of dehydration, expression lines, and loss of volume, and this is where this active becomes indispensable. Thus, one of the best ingredients you can turn to.

And as with any other active, the best way to experience its benefits is to do it with a serum. These products offer much more concentrated and effective formulas, unlike creams that have other functions such as sealing in moisture. And these are some of our favorites.

The best hyaluronic acid serums

Hyaluronic Acid 1,5% by Etat Pur has established itself as a reference among beauty experts. It is not a conventional serum; it is a Pure Active designed as a targeted solution to address dehydration and wrinkles specifically, delivering results where others stay on the surface: thanks to its advanced technology, this active manages to penetrate up to 3 times more than a conventional serum. Price: 26 euros.

Hyaluronic Acid 1.5% by Etat Pur has established itself as a reference among beauty experts. It is not a conventional serum; it is a Pure Active designed as a targeted solution to address dehydration and wrinkles, delivering results where others stay on the surface—thanks to its advanced technology, this active penetrates up to 3 times more than a conventional serum. Price: 26 euros.

Hyaluronico 3 Plus by Laluz from Lourdes Moreno stands out for having 2% hyaluronic acid and three different molecular weights, which deeply hydrates each layer of the skin, increasing water retention up to a thousand times its size. Its densifying action prevents expression lines, treats existing wrinkles, and returns elasticity and suppleness to the face. Price: 57.95 euros.

Ultra Pure High Potency by Kiehl’s is a concentrated hyaluronic acid serum at 1.5% for dry skin, crafted with only 7 ingredients that help replenish and retain moisture for a more hydrated skin with a healthier look. Price: 38 euros.

Emma Caldwell
Emma Caldwell
I’m Clara Desrosiers, a writer and fashion editor based in Toronto. I founded Backdoor Toronto to explore the intersection of fashion, identity, and culture through honest storytelling. My work is driven by curiosity, community, and a love for the creative pulse that defines this city.