1 oz/ 30 mL
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1 oz/ 30 mL
Kiehl's Since 1851 Vital Skin-Strengthening Hyaluronic Acid Serum Image 2
Kiehl's Since 1851 Vital Skin-Strengthening Hyaluronic Acid Serum Image 3

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

ITEM 2324739
583 reviews
6303 loves
SIZE: 1 oz/ 30 mL
What it is: A skin-strengthening serum that protects against skin-aging stressors and visibly corrects signs of aging.

Skin Type: Normal, Dry, Combination, and Oily

Skincare Concerns: Dryness, Fine Lines, and Wrinkles

Formulation: Lightweight Serum

Highlighted Ingredients:
- 11kDa Hyaluronic Acid: By delivering hydration to skin’s most vulnerable layer, 11kDa hyaluronic acid helps better retain moisture for improved resiliency, suppleness and bounce; the brand’s smallest molecular size of hyaluronic acid, 11kda, penetrates to fortify skin.
- Adaptogenic Herbal Complex: A proprietary blend of adaptogens—red ginseng root, holy basil and antioxidant-rich schisandra berry; within this formula, these adaptogens work synergistically to defend skin from stressors while renewing and resurfacing skin’s texture for a smooth, radiant appearance.

What Else You Need to Know: This serum protects against stressors including sun exposure, pollution, stress, lack of sleep, diet, and temperature that can lead to early signs of aging. It visibly reduces fine lines and boosts the appearance of skin’s radiance for a glowing, healthy look.

Clinical Results: Based on a 4-week clinical study on 58 subjects tested in urban and polluted environments:
- Clinically demonstrated to boost radiance by 29% and improve resilience by 38% for glowing, healthy-looking skin
- Clinically demonstrated to visibly reduces fine lines by 27%

Based on Skin Strength Index = Composite average score of skin suppleness, plumpness, and resiliency:
- Clinically demonstrated to double skin’s strength and help visibly reduce fine lines, smooth texture, and boost radiance for a healthy-looking glow