Skincare

The Best Hyaluronic Acid Serums to Hydrate & Plump Your Skin

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SkinTalks - October 21, 2026

What is hyaluronic acid and why is it so effective?

If dehydrated skin is your main concern, a hyaluronic acid serum is one of the easiest ways to add more hydration to your routine. From lightweight formulas for oily skin to richer options for dryness and barrier support, there’s a formula for almost every skin type. This ingredient can hold up to 1,000 times its weight in water, which is why the right formula can leave skin looking noticeably plumper and dewier, even after a single use.

Hyaluronic acid is gentle, layers well with almost anything, and it works for nearly every skin type, from oily to sensitive to mature. But how do you find the right formula?

In this SkinTalks guide, we cover the Korean formulas our Glowies keep coming back for.

What is hyaluronic acid and why is it so effective?

Hyaluronic acid is a humectant, a substance that attracts and holds onto water. It occurs naturally in your skin, joints, and connective tissue, where it helps keep tissue cushioned and hydrated.

The problem is that natural hyaluronic acid production slows down over time, and environmental factors like sun exposure and pollution mean it breaks down faster. This is part of why skin can start to look tighter, drier, or less bouncy as we age.

That's where a hyaluronic acid serum comes in. Applying one gives your skin what it’s losing, providing an extra reserve of hydration to draw on. Hyaluronic acid serums work by pulling water into the skin's surface layers; the result is plumper texture, softer fine lines, and that dewy, light-catching finish that's key to glass skin.

When to use hyaluronic acid

Because it's naturally found in the body, hyaluronic acid serum for skin is gentle enough for nearly every skin type. The key is knowing when to use it.

Hyaluronic acid pulls water toward itself, but it isn't picky about where that water comes from. In humid conditions or on damp skin, it draws moisture in from the air and the layers below. But in dry air or on completely dry skin, it can end up pulling water from deeper in your skin instead, which leaves skin feeling more dehydrated, not less.

That's why application matters as much as the product itself. Apply hyaluronic acid serum to slightly damp skin, right after cleansing and toning. The extra moisture on the surface gives the serum somewhere to draw water in from, rather than pulling it out of your skin.

Always be sure to follow with a moisturizer. This locks the hydration in and stops it from evaporating off the surface before it can do its job. Skip this step, and you can end up with the tightness you were trying to avoid. To find out more about serums and how to optimize using them, check out our guide to face serums.

The best hyaluronic acid serums for every skin concern

Looking for a truly effective and hydrating hyaluronic acid formula? Here are six of the serums our Glowies keep repurchasing.

1. Best everyday serum

Hyaluronic Acid 100

£17.06

If you're new to hyaluronic acid serum and want a reliable, no-frills option, this is a great everyday pick. It's a cult favorite for good reason: a high concentration and multiple molecular weights of hyaluronic acid mean it hydrates at every layer of skin.

Why we love it: It's lightweight enough for oily skin but hydrating enough for dry skin.

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2. Serum for overnight hydration

If your skin looks tired by the end of the day, this is the one to reach for at night. Part serum, part overnight mask, it's built to work while you sleep, delivering hydration in a thicker, more cushioned texture than a typical serum.

Why we love it: It's an easy way to add an extra dose of moisture on nights your skin needs more care.

No.6 Deep Sleep Mask Serum

£21.27

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3. PDRN serum favorite

PDRN Hyaluronic Acid Capsule 100 Serum

£20.44

If you're looking for a hyaluronic acid serum that does more than just hydrate, this is a great choice. It pairs PDRN, a repair-focused ingredient popular in Korean skincare, with hyaluronic acid, making it a strong pick when skin needs both a moisture boost and a little extra support recovering from sun exposure or barrier stress.

Why we love it: Ginseng and PDRN work alongside the hyaluronic acid here, so this serum actively supports skin's resilience as it hydrates.

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4. Serum for sensitive or redness-prone skin

If your skin is red or needs a little extra calming, this is the hydrating serum to opt for. It combines hyaluronic acid with centella asiatica, so it hydrates while soothing redness and irritation at the same time.

Why we love it: It's a great option for reactive or breakout-prone skin that still needs the plumping benefits of hyaluronic acid.

Madagascar Centella Hyalu-Cica Blue Serum

£11.29

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5. Ideal serum for barrier support

Beta Panthenol Repair Serum

£17.06

If your skin barrier needs a little TLC because of redness, tightness, or sensitivity after over-exfoliating, this is a solid pick. It combines panthenol, known for supporting skin recovery, with hyaluronic acid's hydrating power, so it soothes as much as it hydrates.

Why we love it: It treats hydration and barrier repair as one step instead of two which makes it a good product to reach for when your skin needs a reset.

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6. Best lightweight serum

If you prefer a light, watery serum over anything thick or cushiony, this is worth trying. It's a minimalist formula built around hyaluronic acid and black tea extract, with a thin texture that makes it an easy first serum for anyone easing into a routine.

Why we love it: It keeps things simple, just hydration and a touch of antioxidant support, with a texture light enough to layer under anything.

Black Tea Boosting Serum

£29.93

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Want to explore more of our top recommendations? Check out our full collection of serums.

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Skincare | Oct 21, 2026