Vital Skin-Strengthening Hyaluronic Acid Super Serum

All Skin Types, including Sensitive Skin

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

Vital Skin-Strengthening Hyaluronic Acid Super Serum

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

Old price New price $145.00 ($1.45 / ml)

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What It Is

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.

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

See full list

How to Use

Apply our Hyaluronic Acid serum onto cleansed face and neck, morning and night
Can also be used before another serum
Then apply a daily moisturizer
Avoid contact with eyes
If contact occurs, rinse thoroughly with water

Kiehl’s Environmental Impact Scores

As part of our Kiehl’s Mission Renewal journey, we are providing the Environmental Impact Score to help you make informed decisions about the formulas you use. Kiehl’s is committed to continually improving the impact of our products throughout the product lifecycle, including the production and usage phase. This tool is designed to help assess the relative environmental and social impact of Kiehl’s Products compared to other L’Oréal Group products in the same category in 2020.

The calculation method was developed with the help of independent scientific experts and Bureau Veritas Certification, an independent auditor. The score takes into account 14 environmental impact factors all along the product's life cycle.

Learn more about the methodology, here.

Overall environmental impact

Compared to other similar L’Oréal Groupe Products sold worldwide in 2020

Carbon footprint

5.1¹g per average amount used

72g per 10mL

Water footprint

0.2² per average amount used

3.9 per 10mL

Every consumer product has some impact on the environment. A good score here does not mean a product has a positive impact or no impact on the environment. The letters and colors used in this tool are designed to help you make comparisons to other L’Oreal Groupe products in the same category around the world in 2020, so you can make more informed choices.

This product currently has a less favorable impact than we aim for, so we have set out an action plan to improve its environmental and social performance over the coming months. The letters and colors used in this tool are designed to help you make comparisons to other similar products in L'Oréal's global portfolio, so you can make more informed choices.

*Compared to other similar L’Oréal Groupe Products sold worldwide in 2020

This impact score is based on the simulated usage of 1 product and 4 refills.

Manufacturing Conditions

98%

Renewable energy:

100%

Packaging Facts

% of cardboard/paper certified
FSC^TM or PEFC:

34%

% of bottle made of recycled material³ including colorant:

Refillable or reusable:

Social impact of the product

The ingredients and components of this product are sourced from suppliers committed to respect the Fundamental principles of the UN on labor standards.

1 or more suppliers committed to the social inclusion of people from vulnerable communities contributed to making this product.*

¹Grams of CO2 equivalent ("face care" category average = 9.6g)

²Water index including water quality + water scarcity (m3) - "face care" category average = 1.9

³Excuding pumps and/or caps

Did You Know?

Every day your skin comes into contact with stressors that can all lead to premature skin aging. UV exposure, pollution and extreme temperatures along with tobacco, stress, lack of sleep and nutrition can all have negative impacts on your skin and cause dullness, dryness, dehydration, fine lines and other signs of aging. Our formula is clinically demonstrated^* to double skin’s strength^** to help protect against the stress-related signs of aging to help keep your skin more radiant and healthy-looking.

*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.