Hyaluronic acid is in almost everything now, which makes it easy to assume it behaves the same way in every product. For drier, more mature skin, how it is delivered matters as much as whether it is there.
What it actually does
Hyaluronic acid is a humectant: it attracts water and holds it in the outer layer of the skin, which is why skin feels replenished and looks smoother soon after applying it. It works on water, not on oil, so it answers one half of dryness and not the other.
Why it works better inside a cream
On its own, in dry indoor air, a hyaluronic acid serum can leave skin feeling tighter than before it went on. Water is drawn to the surface and then evaporates, with nothing holding it there.
Hyaluronic acid holds water. Something still has to stop that water leaving.
That is the case for a humectant delivered inside a rich cream rather than under one: the oils and emollients sit over the water and slow its loss. If you prefer a separate serum, apply it to slightly damp skin and put a cream on top.
What it will not do
Many people met hyaluronic acid first as an injectable, which sets an expectation no cream can meet. On the surface it holds moisture in the outer layer; it does not fill lines from beneath. The effect is real, and it lasts as long as you keep it up.
One label note: ingredient lists usually read sodium hyaluronate rather than hyaluronic acid. It is the salt form, it is more stable in a formula, and it is what ours contains.
This article is general information, not medical advice. Speak with a qualified healthcare professional about your own skin, and do not use retinol during pregnancy or nursing without their guidance.
