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Powerful-Strength Vitamin C Serum

Old price New price $130.00

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A potent Vitamin C serum formulated with 12.5% Vitamin C and Hyaluronic Acid that visibly diminishes fine lines in just 2 weeks. Paraben-Free. Alcohol-Free. Mineral oil-free. Dye-free.

Powerful-Strength Vitamin C Serum

A potent Vitamin C serum formulated with 12.5% Vitamin C and Hyaluronic Acid that visibly diminishes fine lines in just 2 weeks. Paraben-Free. Alcohol-Free. Mineral oil-free. Dye-free.

Select a size

1.7 fl oz / 50 ml

Old price New price $79.00 ($1.58 / ml)

2.5 fl oz / 75 ml

Old price New price $105.00 ($1.40 / ml)

3.4 fl oz / 100 ml

Old price New price $130.00 ($1.30 / ml)

Quantity

*You have chosen to pick up your item in store. If you would like to ship items to your home, you must create a separate order or modify the entire order.

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What It Is

A Vitamin C serum that boosts radiance, helps firm skin and visibly diminishes fine lines, wrinkles and pores for smoother-looking skin. Formulated with 10.5% L-Ascorbic Acid and renewable 2% Ascorbyl Glucoside plus Hyaluronic Acid, this patented, water-free concentrate is a Kiehl’s customer favorite. Paraben-free, alcohol-free, mineral oil-free, and dye-free.

What It’s Good For

Helps visibly reduce lines and wrinkles while helping firm skin over time
Smoothes skin’s texture and helps visibly minimize the appearance of pores
Antioxidant Pure Vitamin C penetrates skin’s deeper surface layers and remains effective in skin for up to 6 days
Provides visible results in just 2 weeks
Dermatologist-tested for safety
Formulated for all skin types, including sensitive skin
Made with Recyclable Packaging
TSA Approved

Key Ingredients

How to Use

After cleansing, apply two pumps of Vitamin C serum over entire face, avoiding the eye area
As it blends into skin, you may experience a feeling of warmth as the formula activates
Avoid the eye area; in case of contact with eyes, rinse them immediately
Discover our other anti-aging formulas like our nighttime facial oil and our micro-dose anti-aging retinol serum.

When to Use

Apply morning and night, after cleansing and toning and before your moisturizer

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

Carbon footprint

9.1¹g per average amount used

119g par 10mL

Water footprint

0.5² per usage dose

6 per 10mL

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. You can also use [insert Marketing alternative here] as an alternative. 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.

Manufacturing Conditions

Made in the United States of America at a responsible plant

Waste recovery:

97%

Renewable energy:

>99%

Enviromental impact of the packaging

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

100%

% of bottle made of recycled material³:

Recyclable⁴:

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.

6 suppliers used in the making of this product are part of the L’Oreal Solidarity Sourcing Program.

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

⁴Recycling instructions may vary locally

Learn More

Our Vitamin C Serum Results

How quickly can I expect to see results from Kiehl’s Vitamin C Face Serum?

Immediately: Vitamin C Serum Visibly Improves Skin Texture and Boosts Radiance
In 2 weeks: Vitamin C Serum Reduces Lines and Wrinkles
In 4 weeks: Vitamin C Serum Visibly Reduces Deep-Set Wrinkles

*Results from an 8-week clinical study. Photos not retouched. Individual results may vary.

Complete Your Routine

Discover efficacious formulas to upgrade your routine.

Step 1: Cleanse

Ultra Facial Cleanser

Old price New price $16.00

Step 2: Treat

Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum

Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum

One size only

0.5 fl oz / 15 ml

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Step 3: Correct

Powerful-Strength Vitamin C Serum

Old price New price $130.00

Step 4: Hydrate

before and after cheek - Visibly younger looking skin

92% saw improvement in visible wrinkle reduction

Super Multi-Corrective Anti-Aging Cream for Face and Neck

Old price New price $98.00

Did You Know?

Kiehl’s became pioneers in Vitamin C skincare when we first stabilized Vitamin C in our efficacious, water-free concentrate. Our patented Vitamin C serum is highly stable ensuring that our formula is concentrated with an efficacious amount of Vitamin C while still being suitable for sensitive skin. Within our formula, our Vitamin C penetrates skin’s deeper surface layers — up to 10 layers deep!

Frequently Asked Questions

What makes Kiehl’s Powerful-Strength Line-Reducing Concentrate unique?

Our formula is clinically demonstrated to help reduce the appearance of lines and deep-set wrinkles, while boosting radiance and helping even skin texture over time. Formulated with antioxidant Pure Vitamin C, which is a powerful skincare ingredient that begins working immediately, our Vitamin C serum is potent, yet gentle enough for sensitive skin and formulated to enhance the efficacy of Vitamin C benefits with continued use. Our formula is specially designed to stabilize Vitamin C. It’s true, Pure Vitamin C can degrade when exposed to water, but our water-free formula helps to keep the high concentrations of Pure Vitamin C stable and effective.

What are the benefits of Vitamin C?

From boosting radiance to helping diminish the signs of aging to antioxidant protection, Vitamin C is a highly efficacious skincare ingredient with a wide range of benefits. It’s a popular ingredient with proven results and lots of science and research to back up its benefits for your skin. One of the best ways to incorporate this tried-and-true ingredient is in a Vitamin C serum, like our Powerful-Strength Vitamin C Serum. These concentrated complexion boosters provide a targeted treatment to help your skin look brighter, smoother, and healthier.

What are the different forms of Vitamin C within Powerful-Strength Line-Reducing Concentrate?

There are actually several different forms of Vitamin C that are used in skincare formulas. Vitamin Cg, or Ascorbyl Glucoside, is a potent derivative of Vitamin C that provides antioxidant protection and helps to minimize the visible signs of aging. Our Vitamin C serum is formulated with 2% Vitamin Cg to help enhance the efficacy of Vitamin C benefits over time. While they have overlapping benefits, Pure Vitamin C (L-Ascorbic Acid) is absorbed into skin and starts working immediately upon contact while Vitamin Cg (Ascorbyl Glucoside) activates once absorbed into the upper layers of skin to boost Vitamin C activity over time. Kiehl’s Vitamin C serums and formulas effectively incorporate a form of topical Vitamin C that is carefully selected to maximize its targeted efficacy.

Should you pair Powerful-Strength Line-Reducing Concentrate with SPF?

We always recommend using SPF protection to help keep skin protected from UVA/UVB rays and pollution, which can cause the first signs of aging. The antioxidant benefits of Vitamin C can complement the protective effects of SPF. In fact, it is beneficial to apply Vitamin C before you head outdoors. Topical Vitamin C has been demonstrated to decrease generation of UVA-induced free radicals and can bolster skin’s antioxidant defenses with Vitamin E regeneration.

What age is a Vitamin C serum recommended for?

Our Vitamin C formula is designed for all ages and helps to visibly treat fine lines and wrinkles, uneven skin texture and the appearance of pores. Vitamin C levels deplete in skin over time, so using skincare products with Vitamin C is important as you grow older. However, our formula is still effective to use before you start to see fine lines and wrinkles. Our Vitamin C serum helps boost radiance and provide antioxidant protection to help defend skin from early signs of aging.

Is a Vitamin C serum recommended for sensitive and acne-prone skin?

Our vitamin C serums are carefully formulated and tested to be gentle enough for sensitive skin. Kiehl’s Powerful-Strength Line-Reducing Concentrate is formulated with Fragmented Hyaluronic Acid to help reduce the appearance of deep wrinkles and even skin texture for all skin types, including sensitive skin. When first starting with a Vitamin C serum, we recommend using once a day and building gradually to twice daily usage. If you have specific concerns, however, consult your dermatologist before incorporating new skincare products into your routine.

Does Powerful-Strength Line-Reducing Concentrate help with hyperpigmentation?

How do you apply your Vitamin C serum?

After you cleanse and tone your skin, apply 1-2 pumps of our Vitamin C serum. Smooth it on morning and night before your moisturizer to help lock in the skin benefits of your Vitamin C serum. While Vitamin C help defends skin during the day, it is also an effective ingredient to use in your nighttime skincare routine. For best results, use your Vitamin C serum twice a day, morning and night.

How often should you apply a Vitamin C serum?

As with products formulated with active ingredients, when first beginning to use a Vitamin C serum, start with a once-daily application, and gradually build to twice a day. With regular recommended usage in the morning and at night, our 50ml formula should last approximately 1 month. Always consult with your dermatologist when incorporating new skincare products into your routine.

Where do you store your Vitamin C serum?

Because L-Ascorbic Acid serums can degrade in heat and humidity, putting yours in the medicine cabinet could cause it to lose its effectiveness. While many L-Ascorbic Acid serums come in dark-colored or amber bottles that can help protect the formula from light, you should still be sure to keep your products away from direct sunlight.

Is it safe to use this product during pregnancy and breastfeeding?

While every ingredient we use in our products is evaluated for safety, we do not specifically test our products on women who are pregnant or nursing. Kiehl's ensures there is substantial information supporting the safety of our products when used as directed by consumers. However, as there could be certain ingredients that physicians may not recommend for use during pregnancy and nursing, we always recommend that you discuss this with your physician and follow their advice.

Purchase options

Purchase options

Powerful-Strength Vitamin C Serum

A potent Vitamin C serum formulated with 12.5% Vitamin C and Hyaluronic Acid that visibly diminishes fine lines in just 2 weeks. Paraben-Free. Alcohol-Free. Mineral oil-free. Dye-free.

Join My Kiehl's Rewards

PURE VITAMIN C

VITAMIN Cg

FRAGMENTED HYALURONIC ACID

When to Use

Overall environmental impact

Manufacturing Conditions

Enviromental impact of the packaging

Social impact of the product

Our Vitamin C Serum Results

Complete Your Routine

Ultra Facial Cleanser

Powerful-Strength Dark Circle Reducing Vitamin C Eye Serum

Powerful-Strength Vitamin C Serum

Super Multi-Corrective Anti-Aging Cream for Face and Neck

Did You Know?

Frequently Asked Questions

What makes Kiehl’s Powerful-Strength Line-Reducing Concentrate unique?

What are the benefits of Vitamin C?

What are the different forms of Vitamin C within Powerful-Strength Line-Reducing Concentrate?

Should you pair Powerful-Strength Line-Reducing Concentrate with SPF?

What age is a Vitamin C serum recommended for?

Is a Vitamin C serum recommended for sensitive and acne-prone skin?

Does Powerful-Strength Line-Reducing Concentrate help with hyperpigmentation?

How do you apply your Vitamin C serum?

How often should you apply a Vitamin C serum?

Where do you store your Vitamin C serum?

Is it safe to use this product during pregnancy and breastfeeding?

Contact Us

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