Kiehl's Vital Skin-Strengthening Hyaluronic Acid Super Serum — 1 fl oz, lightweight hydration & skin resilience

Kiehl's Vital Skin-Strengthening Hyaluronic Acid Super Serum is a lightweight daily serum that fortifies skin, smooths fine lines, and increases radiance using hyaluronic acid plus an adaptogenic herbal complex.

Designed for all skin types, this 1 fl oz formula from Kiehl's pairs multi-weight hyaluronic acid with a botanical adaptogenic complex to address visible signs of aging linked to environmental and internal stressors like pollution, sun exposure, and daily life stress. It absorbs quickly without heaviness and can be layered under moisturizers or other treatments. Clinical testing reported improvements in texture, resilience, and radiance over four weeks when used morning and night.

How does this serum strengthen skin and reduce the look of fine lines?

The serum combines hydrating hyaluronic acid molecules with an adaptogenic herbal complex to support the skin’s barrier and elasticity. Hydration plumps skin surface appearance while the botanicals aim to improve the skin’s resilience to stressors, which helps make fine lines less noticeable over time.

• Multi-weight hyaluronic acid for immediate and lasting hydration.
• Adaptogenic herbal complex to support skin resilience.
• Formulated to absorb quickly for a non-greasy finish.
• Clinically measured improvements in texture and fine lines over 4 weeks.

Will this serum work with my existing routine and other treatments?

Yes — the serum is lightweight and designed to layer easily under moisturizers and sunscreens or on top of lighter essences. It can also be applied before or after other serums depending on texture; apply to damp skin for best hyaluronic acid performance.

• Use morning and night after cleansing and before moisturizer.
• Can be applied prior to other active serums or treatments.
• Avoid direct contact with eyes; rinse with water if contact occurs.
• Suitable for sensitive skin types as formulated for all skin types.

What improvements can I expect and how soon will I see them?

Clinical testing on volunteers showed measurable changes within four weeks: improved texture, increased radiance, enhanced resilience, and visibly reduced fine lines. Individual results vary based on skin condition and consistent use twice daily.

• Improves skin texture by clinically reported percentages in controlled testing.
• Notable radiance boost and smoother appearance with continued use.
• Regular application twice daily recommended for best results.
• Suitable for people exposed to urban or environmental stressors.

How should I apply the serum for best results?

Apply a few drops to cleansed face and neck, morning and evening. Press gently until absorbed, then follow with your usual moisturizer and SPF in the morning. For layering, apply this serum before heavier creams and after any very lightweight essences.

• Apply to clean, slightly damp skin for optimal hydration retention.
• Use morning and night; follow with moisturizer and sunscreen in daytime.
• Can be used under makeup once fully absorbed.
• Stop use if irritation occurs and consult ingredients if you have known sensitivities.

Who is this for: Kiehl's Vital Skin-Strengthening Hyaluronic Acid Super Serum is intended for anyone seeking a lightweight, daily hydrating serum to support skin texture, luminosity, and resilience. It’s suitable for all skin types — including sensitive skin — and for people living in urban or high-stress environments who want to address early visible signs of aging without a heavy formula.

Ingredients

AQUA / WATER,DIMETHICONE,GLYCERIN,ALCOHOL DENAT.,HAMAMELIS VIRGINIANA WATER / WITCH HAZEL WATER,PROPANEDIOL,PHENOXYETHANOL,TOCOPHEROL,AMMONIUM POLYACRYLOYLDIMETHYL TAURATE,SCHISANDRA CHINENSIS FRUIT EXTRACT,CAPRYLOYL SALICYLIC ACID,CAPRYLYL GLYCOL,XANTHAN GUM,PEG-60 HYDROGENATED CASTOR OIL,PANAX GINSENG ROOT EXTRACT,SODIUM ACETYLATED HYALURONATE,PEG-20 METHYL GLUCOSE SESQUISTEARATE,DISODIUM EDTA,OCIMUM SANCTUM LEAF EXTRACT,CITRUS AURANTIUM DULCIS PEEL OIL / ORANGE PEEL OIL,LIMONENE,ADENOSINE,SODIUM HYDROXIDE,METHYLDIHYDROJASMONATE,CITRIC ACID,EUGENOL,SODIUM BENZOATE,PELARGONIUM GRAVEOLENS FLOWER OIL,CITRAL,POTASSIUM SORBATE,LAVANDULA ANGUSTIFOLIA OIL / LAVENDER OIL,CYMBOPOGON SCHOENANTHUS OIL,CITRONELLOL,LINALOOL,GERANIOL,ROSMARINUS OFFICINALIS LEAF OIL / ROSEMARY LEAF OIL