Best Serums for Dry Skin: A UK Buying Guide

The best serums for dry skin pair humectants — hyaluronic acid, glycerin, polyglutamic acid — that pull water into the skin with ceramides and supporting lipids that keep it there. Choose fragrance-free formulas, apply to damp skin, and always finish with a moisturiser or occlusive to stop that water evaporating straight back out.

Dry skin vs dehydrated skin: what's the difference?

Dry skin is a skin type. It produces less sebum, so it runs short on lipids long-term, and shows up as flaking, tightness and a rough texture. Dehydration is a temporary condition — a lack of water rather than oil — and it can affect any skin type, including oily skin, especially after sun exposure, central heating, over-exfoliation or a harsh cleanser.

Genuinely dry skin needs both water and oil replaced. Dehydrated skin usually just needs hydration and a sturdier barrier routine. Most people with persistent dryness are dealing with a bit of both, which is why both the serum and the way you layer around it matter. Our skin barrier guide covers this distinction in more depth.

Which ingredients actually help dry skin?

Humectants — for water

• Hyaluronic acid (HA): holds up to 1,000 times its weight in water. Look for multi-molecular-weight formulas that hydrate at different skin depths — surface plumping alongside a deeper reservoir. See our hyaluronic acid glossary entry for the full ingredient science.
• Glycerin: unglamorous, extensively researched, and reliably effective. Cheap to formulate, often paired with HA to extend its performance.
• Polyglutamic acid: forms a hydrating film on the skin's surface and can help reduce transepidermal water loss (TEWL) when used alongside HA.

Humectants solve half the problem. Dry skin also needs its lipid barrier rebuilt, which is where ceramides, cholesterol and fatty acids come in — together they make up the "mortar" that holds skin cells in place and keeps moisture from escaping. Ceramides alone account for roughly half the lipids in a healthy barrier, and topical ceramides, particularly formulated in a 3:1:1 ratio with cholesterol and fatty acids, help replenish what's been lost to ageing, harsh actives or environmental stress. Most effective barrier-repair serums combine all three rather than relying on ceramides in isolation. Niacinamide supports this repair process too, helping reduce moisture loss while calming the redness that often accompanies dryness. Antioxidants such as vitamin C, vitamin E and ferulic acid don't hydrate directly, but they protect an already-compromised barrier from further environmental stress, and are worth introducing once hydration is under control rather than at the start.

How do you layer and seal serums for dry skin?

Order matters more for dry skin than for any other skin type. Get it wrong and you'll seal in nothing, or seal in a formula that hasn't finished doing its job.

1. Cleanse with a gentle, non-foaming or cream cleanser. Sulphate-based foaming cleansers strip lipids that dry skin can't afford to lose.
2. Apply humectant serums to damp skin. Hyaluronic acid needs moisture in the environment or the skin to draw from. On very dry skin in a dry climate, it can occasionally pull water from deeper skin layers instead. Pat serum onto skin that's still slightly damp, not fully dried.
3. Layer thinnest to thickest. Watery HA and humectant serums go first, richer ceramide or growth-factor serums next, then moisturiser.
4. Seal with a moisturiser or occlusive. This is the step people skip, and it's what keeps the humectant's water in the skin rather than letting it evaporate back out. An occlusive can be a moisturiser, a balm or a facial oil.
5. Apply SPF every morning. UV exposure degrades a barrier that's already under strain.

Our pick of serum types for dry skin

Dry skin rarely responds to a single hero serum; it tends to improve fastest when a humectant and a barrier-repair formula work together. Explore our full dry skin collection to shop by concern.

Hyaluronic acid & humectant serums

Multi-weight HA serums are the foundation of any dry skin routine. Ranges from Medik8 and SkinCeuticals combine hyaluronic acid with supporting humectants like glycerin for immediate plumping and longer-lasting hydration. Browse the full hyaluronic acid collection.

Ceramide & barrier-repair serums

For skin that's dry and visibly compromised — flaking, tight, reactive — ceramide-led formulas from ranges such as NeoStrata and Medik8 rebuild the lipid matrix directly. They work particularly well layered under moisturiser in the evening, or on their own on skin that needs recovery time. Shop the ceramides collection.

Growth-factor & hydrating peptide serums

AlumierMD and Jan Marini offer growth-factor and peptide serums that support the skin's own repair processes alongside hydration, a sensible option for dry, ageing skin looking for more than hydration alone.

Antioxidant serums for dry, stressed skin

SkinCeuticals and iS Clinical vitamin C serums are worth introducing once the barrier has stabilised. They won't hydrate, but they shield dry skin from the environmental stress that makes barrier repair harder going forward. Introduce gradually, as some vitamin C formulations can feel drying on very reactive skin.

What are the best routine tips for dry skin?

Patch test any new serum before committing to it, particularly actives like vitamin C or retinoids, which can heighten sensitivity on a barrier that's already under strain. Introduce one new active at a time so you can tell what's actually working. In winter or centrally heated rooms, a facial oil as a final step reinforces occlusion when the air itself is working against you. Reassess seasonally: skin that's merely dehydrated in summer can need a genuinely richer, ceramide-led routine come winter. And give any barrier-repair routine four to six weeks before judging it — ceramides and lipids work cumulatively, not overnight.

FAQs

What's the best ingredient for dry skin in a serum?

There isn't a single answer — hyaluronic acid and glycerin address the water side of dryness, while ceramides address the oil and lipid side. The most effective dry skin routines use both, layered correctly and sealed with a moisturiser.

Should I use hyaluronic acid or ceramides first?

Apply thinnest to thickest: humectant serums like hyaluronic acid go on first, to damp skin, followed by richer ceramide serums, then your moisturiser to seal everything in.

Can hyaluronic acid make dry skin drier?

It can if used without an occlusive follow-up, particularly in low-humidity environments. HA needs to draw water from somewhere, and if there's none in the air, it may pull from deeper skin layers instead. Always follow with a moisturiser or facial oil.

Is niacinamide good for dry skin?

Yes. Niacinamide supports the skin barrier and can help reduce water loss, making it a useful addition alongside, not instead of, humectants and ceramides.

How often should I use a hydrating serum if I have dry skin?

Twice daily is typical, morning and evening, with humectant serums applied to damp skin and always followed by a moisturiser or SPF in the morning to lock hydration in.