KIEHL'S - Vital Skin-Strengthening Hyaluronic Acid Super Serum

Our 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.

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
TSA Approved
*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.