Hyaluronic acid was first isolated in 1934 by Karl Meyer and John Palmer, two scientists at Columbia University, from the vitreous humor of cow eyes. They named it after the Greek word hyalos, meaning glassy or vitreous, plus uronic acid, a sugar acid they found in it, according to EBSCO's research summary and a 2025 scientific review.

Ninety-odd years later it is one of the best-known ingredients in skincare. It is a humectant, which means it holds on to water. That is why the best hyaluronic acid serum is the one you apply the right way, not the one in the fanciest bottle. Pat it onto damp skin, then seal it with moisturizer. On bare, dry skin in dry air, a humectant has much less water to work with.

Most of the serums here now use several sizes of hyaluronic acid molecule, usually called multi-molecular or multi-weight. The idea is that larger molecules hydrate the surface while smaller ones work a little deeper. You will see brands count them: five forms, seven types, 5D.

The first grid is eight hyaluronic acid serums to start with. The second is serums with extra actives, like ceramides for the barrier or antioxidants. My tip: if a serum feels sticky, use less. Two or three drops is usually enough for a whole face.

The Ordinary Hyaluronic Acid 2% + B5 is the reference point. It is the one I would hand a skincare beginner. It now has five forms of hyaluronic acid plus ceramides and vitamin B5, and it is fragrance free and non-comedogenic. The INKEY List Hyaluronic Acid Serum is the other simple classic, with 2% multi-molecular hyaluronic acid and Matrixyl 3000 peptide, and it won an Allure Best of Beauty award in 2022.

Glow Recipe Plum Plump is the most fun to use, a bouncy serum with five weights of hyaluronic acid and three kinds of plum. Drunk Elephant B-Hydra is the most reviewed serum in this edit, and it pairs sodium hyaluronate with pineapple ceramide and provitamin B5. Caudalie VinoHydra is oil free, with grape water and grapeseed polyphenols, and it is a good pick for skin that turns red easily.

LANEIGE Water Bank Blue Hyaluronic Serum is hypoallergenic and suitable for sensitive skin, according to the brand, with peptides for firmness. Torriden DIVE IN is the Korean favorite, fragrance free, with panthenol and allantoin to calm. Peter Thomas Roth Water Drench has a 75 percent hyaluronic acid complex plus ceramides, and it is made for normal to dry skin.

What I would skip: using three of these in one routine. One hyaluronic serum is plenty. If your skin still feels tight, the fix is a richer moisturizer, not more serum.

These are the serums I would look at once the basics make sense and you want one bottle to do a little more.

Dr. Barbara Sturm Hyaluronic Serum combines long-chain and short-chain hyaluronic acid with purslane, an antioxidant-rich plant, and it is made without fragrance, silicones or mineral oil. Joanna Vargas The Daily Serum mixes hyaluronic acid with antioxidants, vitamins and a gentle larch-derived exfoliant for glow. iS Clinical Hydra-Cool is weightless and cooling, with centella and vitamin B5, and it suits oily or blemish-prone skin, or skin after a sunburn.

Embryolisse Hydra-Serum pairs high and low molecular hyaluronic acids with white water lily. NIOD Multi-Molecular Hyaluronic Complex is the most technical bottle here, with 15 technologies that are hyaluronic acid, act like it, or help it, and it has the top star rating in the edit.

Dermalogica Circular Hydration adds polyglutamic acid from fermented soybean, another water-holding ingredient. StriVectin Hydration Multiplier has seven types of hyaluronic acid and five ceramides. AESTURA ATOBARRIER365 Hydro CERA-HA is a barrier serum that blends hyaluronic acid with ceramides, fatty acids and cholesterol.

A pairing tip: hyaluronic acid layers easily under vitamin C or retinol, so it can sit in almost any routine.

What I would skip: a hyaluronic serum as your only step in winter. Seal it in with moisturizer, or it will not do much.

I think the best hyaluronic acid serum is the one you use on damp skin, twice a day, under a moisturizer. The molecule has been studied since 1934, and the chemistry is simple: it holds water. Start with a basic formula if you are new to it. Move to a ceramide or antioxidant blend if your skin barrier needs more help. Either way, a few drops is enough, and the moisturizer on top matters as much as the serum underneath. Give it two weeks of steady use before you decide whether it is working.