The Best Ingredients for Dry Skin: Hyaluronic Acid, Ceramides, Squalane & More

Dry skin rarely responds to a single hero product. It responds to a combination: something to draw water in, something to soften and replenish the lipids that hold that water, and something to slow the rate at which it all evaporates. Understanding which ingredient does which job makes it far easier to build a routine that keeps skin comfortable rather than chasing relief one moisturiser at a time.

This guide walks through the ingredients that matter most for dry skin, what each one actually does, and how to layer them so they work together.

What do humectants, emollients and occlusives do for dry skin?

Most well-formulated moisturisers for dry skin lean on three categories of ingredient. Humectants attract water. Emollients (largely lipids) soften the skin and fill the gaps between skin cells. Occlusives form a light seal that reduces water loss. A good routine usually includes all three, because each covers a weakness in the others.

Humectants: hyaluronic acid and glycerin

Humectants pull water into the upper layers of the skin, either from deeper down or from the surrounding air. Hyaluronic acid is the best known. It holds a considerable amount of water relative to its weight, and formulas that blend different molecular sizes tend to hydrate across more than one depth of the skin. It plumps the surface and helps improve the look of fine, dehydration-related lines, though it does not replace lost lipids on its own.

Glycerin is the quieter workhorse. It is smaller, extremely well studied, and sits in a huge number of moisturisers precisely because it hydrates reliably and rarely causes irritation. If your skin is both dry and easily upset, glycerin-forward formulas are a sensible starting point.

One practical note: humectants work best when there is water for them to grab. In a dry, heated room, applying hyaluronic acid to a bone-dry face can occasionally leave skin feeling tighter, because the humectant draws moisture from wherever it can. Apply it to slightly damp skin and follow with something richer on top. You can browse options across the hyaluronic acid range, including AlumierMD's Ultimate Boost Serum, which pairs hyaluronic acid with other hydrating agents.

Emollients and lipids: ceramides, squalane and fatty acids

If humectants supply the water, emollients supply the substance that keeps it there. Dry skin is often short on the lipids that make up the skin barrier, which is why it can feel rough or look dull even after hydration.

Ceramides are central here. They occur naturally in the skin barrier and help hold skin cells together in an orderly structure. Topping them up supports the barrier and reduces the sense of tightness that comes with a compromised one. Formulas that combine ceramides with cholesterol and fatty acids tend to mirror the skin's own composition most closely. The ceramides range is a useful place to look if barrier support is your priority.

Squalane is a lightweight emollient that softens the skin and smooths the surface without a heavy or greasy finish. It is stable, well tolerated, and suits people who want more nourishment than a gel but less weight than a balm. Fatty acids, meanwhile, appear in plant oils and in barrier-repair formulas, and they contribute to that supple, cushioned feel.

Occlusives: shea butter and petrolatum-type ingredients

Occlusives are the seal. Ingredients such as shea butter and petrolatum sit on the surface and slow the rate at which water evaporates, which matters most overnight and in cold, dry weather. They are not there to hydrate; they are there to protect the hydration you have already applied. A thin layer of a richer, occlusive-containing cream or balm as the final step can make a noticeable difference for very dry or flaky skin, particularly on areas that take a beating like the hands and around the nose.

How does niacinamide help repair the skin barrier?

Much of what reads as "dry skin" is really a barrier that isn't functioning at its best. When the barrier is intact, it holds water and keeps irritants out. When it is disrupted, skin loses water more quickly and reacts more readily. This is why barrier repair, rather than sheer hydration, is often the goal.

Niacinamide (vitamin B3) earns its place here. It supports the skin's production of ceramides and other barrier lipids, helps improve the look of an uneven or rough surface, and is gentle enough for most people to use daily. It also tends to play well alongside almost everything else in a routine, which makes it easy to add.

Moisturisers formulated around barrier support bring these threads together. AlumierMD's HydraDew Moisturiser is a richer option for skin that needs replenishing, while HydraCalm Moisturiser suits drier skin that also runs sensitive. For more focused concerns, the targeted serums selection covers hydration and barrier support in lighter, layerable formats.

What should you avoid when your skin is dry?

Some habits quietly work against dry skin, and easing off them often helps as much as adding new products.

Harsh foaming cleansers are a common culprit. A cleanser that leaves skin squeaky and tight has usually stripped some of the very lipids you are trying to protect. A cream, milk or gentle low-foam cleanser cleans perfectly well without that after-feel.

High-strength acids used too often are another. Exfoliating acids have their place, but daily use of strong glycolic or salicylic formulas can thin out the barrier over time. Scaling back to a couple of times a week, and pausing entirely during a flare, gives the skin room to recover.

Drying alcohols high in a formula's ingredient list can leave skin feeling tight soon after application. They are not universally a problem, but if a product consistently stings or dries, they are worth checking for. Very hot water and long showers have a similar effect, softening and stripping the surface more than lukewarm water does.

How do you build a layered routine for dry skin?

The order follows the three jobs. Cleanse gently. While skin is still slightly damp, apply your humectant, such as a hyaluronic acid serum. Follow with an emollient moisturiser containing ceramides, squalane or fatty acids to replenish lipids. In the evening, or whenever skin is especially dry, finish with a richer, more occlusive cream or balm to seal everything in. Niacinamide can sit at the serum stage, and a broad-spectrum SPF completes the morning routine.

Introduce one product at a time so you can tell what is helping, and give any change a couple of weeks before judging it. For a full step-by-step version tailored to different times of day, see our dry skin routine guide.

Frequently Asked Questions

Is hyaluronic acid enough on its own for dry skin?

Usually not. Hyaluronic acid draws water into the skin but does not replace the lipids that hold it there. Pair it with an emollient moisturiser containing ceramides or squalane, and seal with something richer if skin is very dry.

What is the difference between dry and dehydrated skin?

Dry skin lacks oil and lipids and tends to be an ongoing skin type. Dehydrated skin lacks water and can affect any skin type, often temporarily. Dry skin benefits most from lipids and occlusives; dehydrated skin responds well to humectants like hyaluronic acid and glycerin.

Can I use niacinamide if my skin is dry and sensitive?

For most people, yes. Niacinamide supports the skin's barrier lipids and is generally well tolerated. If your skin is very reactive, start with a lower concentration a few times a week and build up as it settles.

Should I still exfoliate if my skin is dry?

You can, but sparingly. Limit stronger acids to once or twice a week and pause during a flare. Over-exfoliating can weaken the barrier and make dryness worse rather than better.

Are occlusives like shea butter or petrolatum bad for the skin?

No. They form a light seal that slows water loss, which supports rather than suffocates the skin. Applied as a final step, particularly overnight, they help retain the hydration you have already layered on.