Ultra Pure High-Potency Serum 1.5% Hyaluronic Acid

Old price £30.00 New price £25.50

A 30ml bottle of Kiehl's Ultra Pure 1.5% Hyaluronic Acid Serum against a white background.

A close-up of the Ultra Pure 1.5% Hyaluronic Acid Serum texture showing clear liquid droplets. Text highlights hydrating benefits and suitability for all skin types.

Blue background with a bottle of Kiehl’s Ultra Pure High-Potency Serum 1.5% Hyaluronic Acid. Bold text reads "100% agree skin feels hydrated."

A graphic highlighting the key ingredient of Ultra Pure 1.5% Hyaluronic Acid Serum: Hyaluronic Acid.

A before-and-after comparison showing skin treated with Ultra Pure 1.5% Hyaluronic Acid Serum. The "before" image shows dry skin, while the "after" image shows instantly boosted hydration.

A comparison graphic showing Kiehl's serums: Hyaluronic Acid, Niacinamide, and Glycolic Acid. Text highlights suitability for normal, combination, and oily skin

A hand applying Ultra Pure 1.5% Hyaluronic Acid Serum with text reading "Apply 2-3 drops, morning and night."

A three-step routine featuring Kiehl's products. Step 1: Ultra Facial Cleanser. Step 2: Hyaluronic Acid Serum. Step 3: Ultra Facial Cream.

A graphic with text reading "Skin Pro Tip: For dry skin, combine the Ultra Pure High-Potency Serums 1.5% Hyaluronic Acid with Serum 5% Pure Niacinamide to balance your skin’s hydration and oil balance."

A bottle of Ultra Pure 1.5% Hyaluronic Acid Serum with text highlighting sustainability claims: "Bottle Made of 20% Recycled Glass" and "Formula Made in Factory Using Renewable Energy"

Ultra Pure 1.5% Hyaluronic Acid Serum bottle and box

A concentrated 1.5% Hyaluronic Acid facial serum formulated with just seven ingredients to help your skin bounce back with replenishing moisture and intensive hydration.

Ultra Pure High-Potency Serum 1.5% Hyaluronic Acid

A concentrated 1.5% Hyaluronic Acid facial serum formulated with just seven ingredients to help your skin bounce back with replenishing moisture and intensive hydration.

One size only

30 ml

Old price £30.00 New price £25.50 (£85.00/100 ml.)

Quantity

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INSTANT SKIN ANALYSIS Find a routine that's personalised just for you. START ANALYSIS

Find a routine that's personalised just for you.

What It Is

Dehydrated skin can leave your complexion looking dull, feeling tight, and showing fine lines more prominently. Hyaluronic acid is one of the most effective hydrating ingredients in skincare, known for its ability to hold up to 1,000 times its weight in water. Our concentrated 1.5% Hyaluronic Acid facial serum is formulated with just seven ingredients to help your skin bounce back with replenishing moisture and intensive hydration.

Our fast-absorbing hyaluronic acid serum for face is a lightweight, non-greasy hydrating serum minimally formulated with only seven ingredients — no unnecessary fillers. Hyaluronic acid is known for its ability to hold up to 1,000 times its weight in water, which may help draw moisture into the skin and reduce the appearance of fine lines. Concentrated with 1.5% Hyaluronic Acid, this pure and potent plumping serum helps visibly replenish and intensively hydrate dry and dehydrated skin, leaving it feeling more plump, healthy and hydrated. Suitable for all skin types, including sensitive (so even the most reactive complexions can benefit), and developed with Kiehl's heritage in dermatological science since 1851.

What It’s Good For

Formulated to help visibly replenish and hydrate dry and dehydrated skin
Minimally formulated for skin absorption and efficacy
Skin looks and feels more plump, smooth and bouncy
Suitable for all skin types, including sensitive
Free of fragrance and colourant
Helps reduce the appearance of fine lines and wrinkles with regular use
Lightweight, non-greasy texture that layers easily under moisturiser and SPF
Helps support the skin's moisture barrier to retain hydration throughout the day

Key Ingredients

Close-up of two pipettes above a glass container with liquid, showcasing a laboratory setting with a blue tint.

Hyaluronic Acid

HYALURONIC ACID

Hyaluronic Acid typically helps skin better retain moisture, which may improve the look of resiliency and make skin feel more supple and bouncy by delivering skin-strengthening hydration.

How to Use

We recommend applying 2–3 drops to clean, dry skin in the morning and evening
We suggest layering with other serums as needed
We recommend exploring our otherconcentrated facial serums like our 9.8% Glycolic Acid serum and 5%Niacinamide serum.

Complete Your Routine

Discover efficacious formulas to upgrade your routine.

Step 1

Ultra Facial Cleanser

A mild foaming cleanser for all skin types.

Old price £23.00 New price £17.25

Step 2

Ultra Pure High-Potency Serum 1.5% Hyaluronic Acid

A concentrated 1.5% Hyaluronic Acid facial serum formulated with just seven ingredients to help your skin bounce back with replenishing moisture and intensive hydration.

One size

30 ml

Old price £30.00 New price £25.50

Step 3

Open jar of Kiehl’s Ultra Facial Cream with 4.5% Squalane and Glacial Glycoprotein, highlighting its 24-hour lightweight hydrating formula

Close-up of a woman applying a white cream to her cheek, with text overlay reading "ULTRA-LIGHTWEIGHT HYDRATION," highlighting Kiehl's skincare benefits for deep moisture.

Ultra Facial Cream

Discover our #1 face cream formulated for all skin types, even sensitive skin, to strengthen your skin's moisture barrier for softer, smoother skin and up to 72-hour hydration. Refill format available.

Old price £21.00 New price £17.85

A clear glass dropper bottle of Kiehl's Ultra Pure High-Potency Serum, labeled with "15% Hyaluronic Acid" and "Moisture-Plumping," set against a reflective, watery background.

Did You Know?

Minimally formulated with only 7 ingredients, our concentrated 1.5% Hyaluronic Acid serum has a fast-absorbing texture that allows ingredients to be rapidly delivered to leave skin feeling more plump, replenished and hydrated. Ready to experience the benefits? SHOP NOW to start your hydration journey.

Frequently Asked Questions

WHAT DOES A HYALURONIC ACID SERUM DO?

A hyaluronic acid serum can help draw and retain moisture in the skin, which may reduce the appearance of fine lines and wrinkles while leaving skin looking plump, smooth and hydrated. Hyaluronic acid can hold up to 1,000 times its weight in water, making it one of the most effective hydrating ingredients in skincare. Our 1.5% Hyaluronic Acid Serum delivers this moisture-binding power in a pure, concentrated formula with just seven ingredients.

CAN YOU USE HYALURONIC ACID SERUM EVERY DAY?

Yes, hyaluronic acid serum is typically gentle enough to use every day — both morning and evening. It's gentle enough for daily use on all skin types, including sensitive skin. We recommend applying 2–3 drops to clean, dry skin before your moisturiser.

IS HYALURONIC ACID SERUM SUITABLE FOR SENSITIVE SKIN?

Yes, hyaluronic acid is generally well-tolerated by sensitive skin. Our Ultra Pure High-Potency 1.5% Hyaluronic Acid Serum is free of fragrance and colourant, and minimally formulated with only seven ingredients, making it a gentle yet effective choice for those with reactive or sensitive skin.

WHAT SHOULD YOU NOT MIX WITH HYALURONIC ACID?

It's generally best to avoid layering hyaluronic acid directly with high-concentration AHAs or BHAs, as these exfoliating acids can disrupt the skin barrier and may reduce hyaluronic acid's effectiveness. However, hyaluronic acid pairs beautifully with most other actives, including vitamin C, retinol and niacinamide. You can explore our other concentrated facial serums to build a routine that works for you.

WHAT PERCENTAGE OF HYALURONIC ACID IS BEST IN A SERUM?

A concentration between 1% and 2% is widely considered effective for delivering visible hydration without irritation. Our serum is formulated at 1.5% Hyaluronic Acid — a potent yet well-tolerated concentration that helps replenish moisture and leave skin feeling plump and bouncy.

HOW DOES HYALURONIC ACID SERUM FIT INTO A SKINCARE ROUTINE?

We recommend applying your hyaluronic acid serum after cleansing and toning, but before your moisturiser and SPF. This typically allows the serum to draw moisture into clean skin, while your moisturiser helps seal it in. Our lightweight formula layers easily with other serums, such as our 9.8% Glycolic Acid serum or 5% Niacinamide serum. SHOP NOW to start building your personalised hydration routine.

Safety Information

In case of contact with the eyes, rinse immediately and thoroughly. If irritation persists, discontinue use and consult a dermatologist.