The best hyaluronic acid serums are the ones that draw water into your skin and, crucially, get sealed in with a moisturiser on top. HA is a humectant, so it helps the appearance of plumper, more hydrated skin, but it is a team player rather than a solo act. Our six picks run from famously cheap drugstore heroes to fragrance-free pharmacy favourites, all real and easy to buy. As always this is editorial guidance, not medical advice, and a patch test comes first.
How we chose
We prioritised well-formulated, widely available serums and a spread of textures and prices, because hyaluronic acid is one category where budget options genuinely hold their own. We flagged fragrance where it matters for sensitive skin, favoured formulas that pair HA with helpful extras like ceramides, vitamin B5 or peptides, and avoided anything overpromising. The honest truth about HA is that most reputable serums do a similar job; the differences are in feel, added ingredients and how cleanly they layer. That is genuinely freeing news, because it means you can start with an eight-pound bottle and only trade up if you fall for a particular texture, rather than assuming the priciest jar hydrates better. For more on building a routine, browse the skincare hub.
A quick word on how hyaluronic acid actually behaves, because it explains every tip that follows. HA is a humectant: it draws water into the upper layers of the skin, which helps the appearance of plumpness. What it does not do is create moisture or lock it in. In humid conditions it pulls water from the air; in dry air, or a heated office, it can pull moisture up from deeper in the skin and, without something sealing it on top, that water can simply evaporate and leave skin feeling tight. This is not a fault in the product, it is just chemistry, and it is why the moisturiser step matters so much.
1. The Ordinary Hyaluronic Acid 2% + B5
The serum that put affordable hyaluronic acid on the map, using multiple molecular weights of HA plus vitamin B5. Why it made the six: it is the default budget entry point, cheap enough to try on a whim and effective at helping the appearance of hydration. Price band: Budget, around £8 / $9. The Sixated take: a fine first HA serum; some find the texture slightly tacky, so a little goes a long way and a moisturiser on top settles it.
2. The INKEY List Hyaluronic Acid Serum
A close rival to The Ordinary, this pairs hyaluronic acid with a peptide complex in a slick, lightweight base. Why it made the six: it is equally wallet-friendly and many find the texture a touch more elegant, making it an easy daily hydrator. Price band: Budget, around £8 / $9. The Sixated take: a great-value everyday option; choose it over the sibling above largely on texture preference.
3. Vichy Minéral 89
A fragrance-free gel booster built around hyaluronic acid and Vichy’s mineralising water, with a notably short ingredient list. Why it made the six: sensitive-skin users trust its pared-back, fragrance-free formula, and the light gel layers cleanly under everything. Price band: Mid, around £25 / $30. The Sixated take: the reassuring pick if you react to fragrance; it feels like a drink of water and plays nicely with actives.
4. La Roche-Posay Hyalu B5 Serum
A pharmacy favourite combining two weights of hyaluronic acid with vitamin B5, aimed at plumping the look of the skin. Why it made the six: it is a well-regarded, effective formula from a trusted sensitive-skin brand. One honest caveat: it does contain fragrance, so patch-test if you are reactive. Price band: Mid, around £38 / $45. The Sixated take: a lovely serum for most, but the fragrance means very sensitive skin might prefer Minéral 89.
5. CeraVe Hydrating Hyaluronic Acid Serum
CeraVe brings its signature ceramides to the party, pairing the humectant pull of HA with barrier-supporting lipids. Why it made the six: because HA draws water in but does not lock it, the ceramides here help the skin hold on to that moisture, which suits drier types especially well. Price band: Budget to Mid, around £16 / $18. The Sixated take: arguably the most sensible single-bottle choice for dry skin, since it partly solves the seal-it-in problem itself.
6. Neutrogena Hydro Boost Hydrating Serum
A drugstore stalwart with a light, bouncy gel texture that absorbs quickly. Why it made the six: it is easy to find almost anywhere, pleasant under make-up, and a dependable option for those who dislike anything sticky. Price band: Budget, around £15 / $18. The Sixated take: a solid, no-fuss choice; not the most exciting formula, but reliably comfortable and widely stocked.
How to get the most from hyaluronic acid
The single most important habit is to seal it in. Apply your HA serum to slightly damp skin, then follow within a minute or so with a moisturiser to trap the water, otherwise in dry conditions it can leave skin feeling tight. Use it morning and night, layer it under other actives, and let a niacinamide serum or your daytime vitamin C serum sit alongside it as your routine grows. Do not forget a daily SPF from our face sunscreens guide, since hydration and protection go hand in hand. Honestly, hyaluronic acid is one of the lowest-risk, best-value steps in skincare, so from all of us at Sixated: start cheap, seal it in, and only trade up if you fall in love with a particular texture.