A hyaluronic acid serum: why it goes on damp skin, and why it needs something on top

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Researched. We have not used this one long enough to give you a verdict, and we would rather say so than invent one. What follows is how it works, who it suits, and what it will not do. When we have used it properly, this page carries the verdict and the date.

CeraVe Hydrating Hyaluronic Acid Serum

Hyaluronic acid is one of the most searched skincare ingredients there is, and this serum is climbing fast in searches right now. It deserves its reputation — and it is also the ingredient most often used in a way that makes skin feel worse, not better.

What hyaluronic acid does

Hyaluronic acid is a humectant: it attracts and holds water. In skin, it is part of what keeps the surface plump and supple. Applied in a serum, it draws water into the outer layer of skin, which is why skin looks fuller and smoother soon after.

The catch

A humectant pulls water from wherever water is available. On damp skin, in humid air, that is the surrounding moisture. On dry skin in dry air — winter heating, air conditioning, a plane — the nearest source can be the deeper layers of your own skin, and without anything on top to stop it, that water evaporates. The result is skin that feels tight an hour later.

So two habits make the difference: apply it to damp skin, and seal it with a moisturizer. The listing gives the same instruction — a thin layer on slightly damp skin, absorbed fully before the next product. We explain the pairing in humectants, occlusives, and the three minutes after a shower.

What this one adds

According to the listing, it contains the highest concentration of hyaluronic acid in CeraVe's range, along with vitamin B5 to soothe and the three ceramides CeraVe puts in everything. Ceramides are part of the skin's own barrier fats, so a hyaluronic serum that also carries them is a better-rounded product than hyaluronic acid on its own.

The listing also describes a delivery system meant to release moisturizing ingredients gradually, for hydration that lasts through the day. It is described as a lightweight gel.

How to use it

After cleansing, while skin is still a little damp — or after a mist or toner — press a few drops into the face. Let it absorb, then follow with your moisturizer, and sunscreen in the morning. It layers under almost anything, which makes it an easy addition to an existing routine.

Who it suits

Dry, dehydrated or tight-feeling skin, and anyone using drying ingredients such as retinoids or acne treatments who wants a gentle hydrating layer. It is also simply a good first serum for someone building a routine.

What it will not do

It will not replace a moisturizer — it adds water, the moisturizer keeps it there. It will not do much for lines beyond the temporary smoothing of better-hydrated skin. And it can feel tight if used on dry skin in dry air without anything on top.

The product

A light hyaluronic acid serum with ceramides and vitamin B5, from a brand known for barrier-friendly basics. Sold by Amazon when we checked.

The one people are searching for is the CeraVe Hydrating Hyaluronic Acid Serum, 1 oz.

CeraVe Hydrating Hyaluronic Acid Serum

We do not print prices here, because a price we typed last month is a price that is wrong today.

Written by JamieG in Garner Town, Tennessee.