Ceramides vs hyaluronic acid for dry skin

Reference: Pavicic et al., 2011

What is the difference between ceramides and hyaluronic acid?

They do different jobs. 💧 Ceramides vs hyaluronic acid isn't a fight between two of the same thing.

Ceramides are fats that sit between the cells in skin's outer layer and help slow water loss.

Hyaluronic acid binds water. One helps keep water from leaving, the other holds on to water.

Reference: Rawlings and Harding, 2004

Reference: Pavicic et al., 2011

Ceramides help keep water in; hyaluronic acid holds water. Ceramides don't work like a lid on their own, though. They're part of a mix of skin fats. 🧱

For a real "lid", petrolatum is the classic example. It makes a seal on top of skin.

Reference: Rawlings and Harding, 2004

Why does dry skin need more than one water ingredient?

Skin holds water with a few parts working together. 🧩 The fats between the cells slow water from leaving.

Natural moisturizing factors hold water inside the outer layer. Dry skin can have less of both. That's why a moisturizer often mixes more than one kind of ingredient.

Reference: Rawlings and Harding, 2004

Read the whole list, not just the star name on the front. A jar can mix a water-binder, skin fats and a sealing ingredient.

A longer list isn't better by itself, though. It just has more to check. 🔍

What did a hyaluronic acid cream trial find?

76 women aged 30 to 60 used a 0.1% hyaluronic acid cream around one eye, twice a day for 60 days. 👁️

Around the other eye they used the same cream base without it. The hyaluronic acid side got better skin hydration and stretchiness than the plain side, in every size group tested.

Reference: Pavicic et al., 2011

The trial tested five sizes of the hyaluronic acid molecule. Only the two smallest sizes also made wrinkles less deep. 🤏

Reference: Pavicic et al., 2011

This was a 0.1% cream near the eyes, not every hyaluronic acid serum. A box that says "small molecule" isn't the same test either. On a label, it may be called hyaluronic acid or sodium hyaluronate.

Does a ceramide study prove one ceramide is best?

No. 🧱 One small study switched 24 children with stubborn eczema to a ceramide-rich mix of skin fats in place of their usual moisturizer.

Their prescribed treatment kept going, and their skin got better. There was no comparison group, so the study can't say which part did the work.

Reference: Chamlin et al., 2002

A result from a mix belongs to that mix. Ceramide NP and ceramide AP are two different ingredients, and neither one was tested alone here.

Can one moisturizer have both?

Yes. 🙌 A moisturizer can hold water with water-binders, slow water loss with a seal, and add back skin fats, all in one jar.

So two separate bottles aren't needed just to get both jobs. Before adding a hyaluronic acid serum, read what the moisturizer already lists.

Reference: Rawlings and Harding, 2004

Different jobs can share one jar. Glycerin is another water-binder name to look for.

Neither study above put a ceramide cream head to head with a hyaluronic acid cream. So there's no winner to name between the two. 🤝

What should you write down from a dry-skin label?

Three things: the full ingredient names, any printed amounts, and the type of product. 📝

A US list goes from the biggest amount down, and ingredients at 1% or less can follow in any order.

So a spot on the list can't tell the exact percent. No printed amount means the amount is unknown.

Reference: US Food and Drug Administration, 2016

A spot on the list can't fill in a missing percent. For hyaluronic acid, compare any printed amount with the 0.1% cream above.

Dry skin in general? See the dry skin page. For a routine built from your own skin answers, take the free skin quiz. ✨