Hyaluronic acid is perhaps the best-known hydrating ingredient in skincare. But not all hyaluronic acid behaves the same way: the size of the molecule determines where and how it hydrates the skin. In this guide we explain what hyaluronic acid is, why molecule size matters and how to get the most out of it.
What is hyaluronic acid?
Hyaluronic acid (HA) is a molecule that occurs naturally in the skin and can bind an exceptional amount of moisture. In skincare it helps to hydrate and plump the skin, giving it a fuller, smoother look.
Why molecule size matters
How it works depends on the size of the molecule:
- High-molecular-weight HA stays more on the surface and forms a moisture film that makes the skin look instantly plumper.
- Low-molecular-weight HA distributes through the upper layers of the skin for hydration on multiple levels.
- Cross-linked HA holds on to moisture for longer.
It is precisely the combination of different forms that delivers hydration across several layers at once.
Hyaluronic acid in your routine
Apply HA to slightly damp skin and follow with a moisturiser to lock the moisture in. In a very dry climate, that sealing step is extra important. Hyaluronic acid suits every skin type — including oily skin, because it hydrates without weighing the skin down.
How Marini SkinSolutions approaches it: Hyla3D
The Hyla3D® line combines five hyaluronic acid technologies: liposome-encapsulated HA, cross-linked HA, ultra-low-molecular-weight HA, traditional sodium hyaluronate and the HA peptide Oligopeptide-24. Together they hydrate the skin on multiple levels rather than at the surface alone.
- Hyla3D® Face Serum — a lightweight serum for daily, deep hydration.
- Hyla3D® Face Cream — seals and nourishes with a richer texture.
- Hyla3D® Face Mask — an intensive moisture boost.
- Hyla3D® HA Lip Complex — targeted care for fuller, smoother-looking lips.
Which Hyla3D should you choose?
If you want lightweight daily hydration, go for the serum. For dry skin, layer the cream on top to help lock moisture in. The mask gives an extra boost, and the Lip Complex looks after the lips.
Tips at a glance
Use HA on damp skin, always seal with a moisturiser and adapt your routine to the climate. That way hyaluronic acid works for you rather than against you.
Frequently asked questions
What is hyaluronic acid?
Hyaluronic acid is a molecule that occurs naturally in the skin and can bind a great deal of moisture. In skincare it hydrates and plumps the skin.
Why are there different types of hyaluronic acid?
Because molecule size determines where it works: high-molecular-weight HA at the surface, low-molecular-weight HA in the upper layers of the skin, and cross-linked HA holds on to moisture for longer. The combination hydrates on multiple levels.
Does hyaluronic acid draw moisture out of the skin in a dry environment?
You limit that risk by applying HA to damp skin and sealing it with a moisturiser. That way it holds moisture in the skin rather than pulling it out.
Which skin type is hyaluronic acid suitable for?
Every skin type, including oily skin, because it hydrates without weighing the skin down.
Serum or cream with hyaluronic acid?
A serum gives lightweight, deep hydration, while a cream seals and nourishes. For dry skin, it is best to combine the two.
