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Powerful-Strength Vitamin C Serum

A potent Vitamin C serum formulated with 12.5% Vitamin C and Hyaluronic Acid.

Powerful-Strength Vitamin C Serum

A potent Vitamin C serum formulated with 12.5% Vitamin C and Hyaluronic Acid.

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Total: $68.00

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Product details

Boost radiance, visibly firm skin and diminish the appearance of fine lines, wrinkles and pores with our customer-favorite Vitamin C serum. Formulated with 10.5% L-Ascorbic Acid and 2% Ascorbyl Glucoside plus Hyaluronic Acid, this patented, water-free concentrate helps improve skin’s appearance for radiant, younger-looking skin.

  • 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 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
  • For all skin types, including sensitive skin
Key Ingredients
Vitamin C

Pure Vitamin C

L-Ascorbic Acid, also known as Pure Vitamin C, is a highly efficacious antioxidant known for its ability to improve the appearance of aging skin. In addition to antioxidant protection, Pure Vitamin C is known to help boost radiance, improve texture and visibly reduce the appearance of lines, wrinkles and other signs of aging.

Vitamin C

Vitamin Cg

Vitamin Cg, or Ascorbyl Glucoside, is a Vitamin C derivative that activates once absorbed into the upper layers of the skin’s surface. With antioxidant benefits, this form of Vitamin C is frequently used in anti-wrinkle skincare products to help reduce facial lines over time.

Fragmented Hyaluronic Acid

Fragmented Hyaluronic Acid

Hyaluronic Acid acts like a sponge to draw moisture into skin’s surface layers and then expands as it absorbs. Within our formulas, Hyaluronic Acid is known to help smooth and plump skin.

See Full List
Print

Boost radiance, visibly firm skin and diminish the appearance of fine lines, wrinkles and pores with our customer-favorite Vitamin C serum. Formulated with 10.5% L-Ascorbic Acid and 2% Ascorbyl Glucoside plus Hyaluronic Acid, this patented, water-free concentrate helps improve skin’s appearance for radiant, younger-looking skin.

  • 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 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
  • For all skin types, including sensitive skin
Print
Vitamin C

Pure Vitamin C

L-Ascorbic Acid, also known as Pure Vitamin C, is a highly efficacious antioxidant known for its ability to improve the appearance of aging skin. In addition to antioxidant protection, Pure Vitamin C is known to help boost radiance, improve texture and visibly reduce the appearance of lines, wrinkles and other signs of aging.

Vitamin C

Vitamin Cg

Vitamin Cg, or Ascorbyl Glucoside, is a Vitamin C derivative that activates once absorbed into the upper layers of the skin’s surface. With antioxidant benefits, this form of Vitamin C is frequently used in anti-wrinkle skincare products to help reduce facial lines over time.

Fragmented Hyaluronic Acid

Fragmented Hyaluronic Acid

Hyaluronic Acid acts like a sponge to draw moisture into skin’s surface layers and then expands as it absorbs. Within our formulas, Hyaluronic Acid is known to help smooth and plump skin.

See Full List

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 2% Ascorbyl Glucoside plus Hyaluronic Acid, this patented, water-free concentrate is a Kiehl’s customer favorite.

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 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

key ingredients

Key Ingredients

Pure Vitamin C

L-Ascorbic Acid, also known as Pure Vitamin C, is a highly efficacious antioxidant known for its ability to improve the appearance of skin aging. In addition to antioxidant protection, Pure Vitamin C is known to help boost radiance, improve texture and visibly reduce the appearance of lines, wrinkles and other signs of aging.

Vitamin Cg

Vitamin Cg, or Ascorbyl Glucoside, is a Vitamin C derivative that activates once absorbed into the upper layers of the skin’s surface. With antioxidant benefits, this form of Vitamin C is frequently used in anti-wrinkle skincare products to help reduce facial lines over time.

Fragmented Hyaluronic Acid

This fast-absorbing form of Hyaluronic Acid is known for its ability to hold up to 1,000 times its weight in water. Acting like a sponge, it draws moisture into skin’s surface layers and expands as it absorbs. Hyaluronic Acid is known to help smooth and plump fine lines and is commonly used in skincare products intended to visibly reduce facial lines and refine texture.

SEE FULL INGREDIENT LIST

how to apply

  • Cleanse skin thoroughly prior to application
  • Apply 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
  • Apply morning and night, after cleansing and toning and before your moisturizer
  • Avoid the eye area; in case of contact with eyes, rinse them immediately
  • Discover our other anti-aging formulas like our anti-aging face cream and nighttime facial oil

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!

results

After

After

Before

Before

IMMEDIATELY: Visibly Improved Skin Texture and Boosted Radiance

IN 2 WEEKS: Reduced Lines and Wrinkles

IN 4 WEEKS: Visibly Reduced Deep-Set Wrinkles

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

Immediate Week 2 Week 4 Week 8
Radiance checked checked checked checked
Decreased Facial Lines checked checked checked checked
Skin Texture checked checked checked checked
Decreased Deep-Set Wrinkles checked checked
Decreased Lip Lines checked checked
Improved Firmness checked
Visibly Reduced Pores checked
The Truth About Vitamin C Skin Care

LEARN THE TRUTH ABOUT THE BENEFITS OF VITAMIN C FOR SKIN

learn more

Powerful-Strength Vitamin C Serum is rated 4.5 out of 5 by 791.
Rated 2 out of 5 by from Confused?!? I received this product as a sample and was in love so I decided to make purchase. This product does not seem the same. It continues to leave my hands stained and my hands and face in the morning smell like I have used a gradual tanner. Wish it was performing like it had when I sampled.
Date published: 2020-01-16
Rated 5 out of 5 by from Love this So far I love this product using it regularly I do see wrinkle line reducing slowly happening. Keep away from eyes.
Date published: 2020-01-11
Rated 3 out of 5 by from Made my skin orange I do not know if I was being paranoid, I looked a bit orange tanned after 1-2 weeks and it turned back to my normal skin tone after stopped using it for around 2 weeks. Even my friend could see the difference. So I looked it up, it said some Vitamin C preparations discolour when they are oxidized and may emerge on the skin. I do not know if this is the reason my skin turned orange. I guess it is just not something for me. I think the packaging should be improved anyway, since it contains high concentration of Vitamin C, there should be a lid to keep it from oxidation. I am a bit disappointed since it is quite pricey.
Date published: 2020-01-03
Rated 1 out of 5 by from A dirty bottle with no manufacturer seal I purchase this online and when I received it, there is no manufacturer seal. The bottle is very dirty and it doesn't even seem to be a full bottle. I'm not trusting it. I can't exchange it in store and I need to pay the return shipping fee to return it even if it is not my fault. Worst shopping experience ever. Will never buy anything from Kiehls.com.
Date published: 2019-12-27
Rated 5 out of 5 by from One of my favs This is one of my fav serums. It has a matte feel, is kind to my skin, and smells good
Date published: 2019-12-27
Rated 2 out of 5 by from Sticky I love Khiel's everything usually but this product is a bit of a disappointment. My face was sticky after application. I understand it has vitamin C but I am sure one could get the same effect from applying orange to your face.
Date published: 2019-12-22
Rated 5 out of 5 by from Amazing product This product goes on really well. You don't need much as a small amount goes s long way. I've been using this for about 3 weeks now and it's made a huge difference in the appearance of my skin. Highly recommend!
Date published: 2019-12-15
Rated 1 out of 5 by from This cream is full of chemicals First ingredient on the list is propylene glycol which comes from propylene, which is a chemical produced as a side effect of petroleum refining.
Date published: 2019-12-13
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storage

how do i store this product? is it better to store it in the fridge like any other vitamin c products?
Asked by: drafwan
Hi there, thanks for your inquiry! We do not suggest storing the Powerful-Strength Vitamin C Serum in the refrigerator as it has been tested to be stored at a normal room temperature. We hope this helps and that you can continue to use our products with great satisfaction!
Answered by: KiehlsCCC
Date published: 2020-01-16

Can this be used alongside the Nightly Refining Micro Peel Concentrate? If yes, in what order?

Asked by: Superbokkie
Hello! We do not suggest applying both Powerful-Strength Vitamin C Serum and Nightly Refining Micro-Peel Concentrate together. It can be too much for the skin, as our Nightly Refining Micro-Peel Concentrate does exfoliate and promote cell turnover. We hope you find this information to be helpful!
Answered by: KiehlsCCC
Date published: 2020-01-15

Is this product safe for use during pregnancy?

Asked by: SRYCG
Hi there! 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 a 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.
Answered by: KiehlsCCC
Date published: 2019-11-21

Can this be used with the midnight recovery oil? If so in what order?

Asked by: Amers
Hi there! Our Powerful-Strength Line-Reducing Concentrate can absolutely be used with our Midnight Recovery Concentrate! Please make sure to apply the Powerful-Strength Line-Reducing Concentrate first before applying the oil. You will love the results!
Answered by: KiehlsCCC
Date published: 2019-11-21

Can this be used with Clearly Corrective Brightening & Smoothing Moisture Treatment

Can I use this with the Clearly Corrective Brightening & Smoothing Moisture Treatment?
Asked by: Titan
Hi there! Yes, this can be used along with the Clearly Corrective Brightening & Smoothing Moisture Treatment. We hope you can give it a try!
Answered by: KiehlsCCC
Date published: 2019-11-12
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