Kiehl's Since 1851 Vital Skin-Strengthening Hyaluronic Acid Super Serum 1oz

Kiehl's Since 1851 Vital Skin-Strengthening Hyaluronic Acid Super Serum 1oz

All Skin Types, including Sensitive Skin

A Hyaluronic Acid serum with an Adaptogenic complex that strengthens skin and boosts radiance.

What It Is
Kiehl's Hyaluronic Acid serum strengthens skin to help resist signs of aging, while boosting radiance and smoothing fine lines. Formulated with 11kDa Hyaluronic Acid — our smallest form of Hyaluronic Acid, which penetrates 8 skin surface layers deep** — and an Adaptogenic Herbal Complex, our serum neutralizes the effects of external skin-aging stressors for youthful, radiant skin.

*Based on a clinical study of 25 panelists measuring the penetration of the full formula via tape stripping.

What It’s Good For

• Helps correct visible signs of aging, which can be caused by skin stressors including pollution, stress and sun exposure
• Clinically shown to improve skin texture by 41%*
• Clinically demonstrated to boost radiance by 29% and improve resilience by 38% for glowing, healthy-looking skin*
• Clinically demonstrated to visibly reduce fine lines by 27%*
• Clinically demonstrated* to double skin’s strength**
• Absorbs easily with a lightweight texture
• For all skin types, including sensitive skin

*Based on a 4-week clinical study on 58 subjects tested in urban and polluted environments.

**Based on Strength Index = Composite, average score of clinically graded parameters after using the product for 4 weeks vs one week of use.

Key Ingredients

11kDa HYALURONIC ACID
Our smallest molecular size of Hyaluronic Acid, this micronized ingredient penetrates to fortify skin within its deepest surface layers.* By delivering skin-strengthening hydration to skin’s most vulnerable layer, 11kDa Hyaluronic Acid helps better retain moisture for improved resiliency, suppleness and bounce.
*Stratum corneum

ADAPTOGENIC HERBAL COMPLEX
Our Adaptogenic Herbal Complex is a proprietary blend of adaptogens — Red Ginseng Root, Holy Basil and Schisandra Berry — traditionally used in Traditional Chinese, Korean and Ayurvedic Medicine. Within our formula, these adaptogens work synergistically to defend skin from stressors while renewing and resurfacing skin’s texture for a smooth, radiant appearance.