Kiehl's Hyaluronic Acid Serum 1.5% — Lightweight Fragrance-Free 1 fl oz, Fast Hydration & Plumping

Kiehl's Ultra Pure High-Potency 1.5% Hyaluronic Acid Serum is a lightweight, fragrance-free concentrate designed to quickly boost surface hydration and help skin look plumper and more resilient.

This fast-absorbing serum pairs a focused 1.5% hyaluronic acid concentration with a minimal seven-ingredient formula to prioritize moisture delivery and skin compatibility. It’s formulated for daily use on all skin types, particularly those experiencing dryness or dullness, and can be layered with other treatments or mixed into makeup for added hydration. The formulation aims to support visible softness and a fuller-looking complexion without unnecessary additives.

How quickly will I notice hydration improvements?

Many users report an immediate boost in surface hydration after the first application thanks to the serum’s lightweight texture and concentrated hyaluronic acid. Over repeated use, skin may appear more plumped and feel springier as moisture levels stabilize. Results depend on individual skin condition and routine consistency.

• Apply 2–3 drops morning and evening to clean, dry skin.
• Absorbs rapidly without greasy residue.
• Visible plumping often reported within one week of regular use.

Can I layer this serum with other skincare and makeup?

Yes — the simple ingredient list and lightweight delivery make it easy to layer under creams, oils, or sunscreen. It also mixes well with liquid foundation or highlighter to add hydration and sheer coverage without changing color payoff. For targeted care, combine under eye cream or richer moisturizers to enhance comfort in dry areas.

• Layer under moisturizer or SPF as a hydrating base.
• Mix a drop into liquid makeup to boost moisture and thin coverage.
• Use beneath eye cream for extra localized hydration.

Is this serum suitable for sensitive or reactive skin?

The formula is fragrance-free and minimal, reducing potential irritants for sensitive skin types. Because it focuses on hyaluronic acid and a short ingredient list, it’s intended to be broadly compatible; however, anyone with known sensitivities should patch-test before full-face use. If irritation occurs, discontinue and consult a dermatologist.

• Fragrance-free and minimally formulated with seven ingredients.
• Recommended patch test for very reactive skin.
• Safe to pair with other actives when used as directed.

How should I use the serum for best results?

Apply a few drops to clean, dry skin twice daily—morning and night—and follow with your regular moisturizer and sunscreen in the daytime. The texture is designed to sink in quickly, so you can layer other products immediately after. Adjust the amount based on seasonal needs or dryness level.

• Dispense 2–3 drops onto fingertips, then press onto face and neck.
• Follow with moisturizer and SPF during the day.
• Add to liquid foundation or apply under eye cream as needed.

Who is this for: This serum is aimed at anyone seeking a straightforward, potent hydration booster—especially those with dry, dehydrated, or dull skin who prefer short ingredient lists and fragrance-free products. It’s also a good match for people who want a versatile serum that layers easily with treatment serums, creams, and makeup.

Ingredients

Aqua/Water, Glycerin, Sodium Hyaluronate, Phenoxyethanol, Chlorphenesin, Tetrasodium Glutamate Diacetate, Citric Acid