Powerful-Strength Vitamin C Serum

All Skin Types, including Sensitive Skin

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

Powerful-Strength Vitamin C Serum is rated 4.4 out of 5 by 478.
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Powerful-Strength Vitamin C Serum

Powerful-Strength Vitamin C Serum

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

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What It Is

An antioxidant-rich Vitamin C serum that instantly 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, stabilized Vitamin C concentrate is a Kiehl’s customer favorite for glowing skin.

What It’s Good For

  • Instantly boosts radiance
  • Helps visibly reduce lines and wrinkles in just 2 weeks, while helping firm skin over time
  • Smoothes skin’s texture and helps visibly minimize the appearance of enlarged pores
  • Stabilized Vitamin C penetrates skin’s deeper surface layers and remains effective in skin for up to 6 days
  • Dermatologist-tested for safety

Key Ingredients in Our Vitamin C Serum

How to Use Our Vitamin C Serum

  • Cleanse and tone skin thoroughly prior to application of vitamin C face serum for day and night
  • As it blends into skin, you may experience a feeling of warmth as the formula activates
  • Follow with your favorite moisturizer and SPF in the day time
  • Avoid the eye area; in case of contact with eyes, rinse them immediately
  • Discover our other anti-aging formulas like our anti-aging face and neck cream, moisturizing facial oil, and our dark circle eye cream.
Did You Know?

Kiehl’s History with Vitamin C Serums

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 hyaluronic acid and vitamin C formula, our Vitamin C penetrates skin’s deeper surface layers—up to 10 layers deep!

Our Vitamin C Serum Results

Before and after

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.



Future Made Better

True to our founding family’s mission, we strive to improve the quality of the communities we serve by reducing our
environmental impact, formulating responsibly, and supporting charitable causes. This formula is made with:
Responsible Formulation
Commitment to Recycling

Complete Your Routine

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Frequently Asked Questions

Answers to Your Frequently Asked Questions

This product evens out my skin tone and even cuts the oil. My skin looks great after 2 weeks. —Eric717, kiehls.com
Rated 5 out of 5 by from Favorite product I started using this almost a year ago and more than any other product (and I've tried a lot) this works wonders. I saw results within days and now it's part of my morning and evening routine. Even with that much usage, the bottle lasts me a long time. I buy the larger bottle and I think I usually get about 6 months out of it. Don't be put off by the little amount of heat you feel when you first put it on your face. That wears off within minutes. I have extremely sensitive skin and I break out if handsoap even gets near my face. I've had no problems with this product. I use it under my sunscreen in the morning and under my recovery concentrate at night. A must have!
Date published: 2012-06-29
Rated 5 out of 5 by from My dermatologist is going to miss me I received a sample of this in my Birchbox. I get seborrheic keratosis on my face. My dermatologist says the only way to get rid of it is by freezing it off. Well, we'll see. Ever since I started using my sample, the seb ker spots are smooth, light, and flake free. When I don't use this, the spots start getting flaky and raised. I don't know if it'll get rid of them, but I do know it will make my need to get them frozen off much less frequent. I never spend this much on skincare. Most of the time, I think most skincare products are over-priced and over-hyped. This is not one of those times.
Date published: 2013-11-02
Rated 5 out of 5 by from Love This Product I am 60+ and look more than a decade younger (sometimes in my head, but mostly because people are shocked to hear my age). I've been using this product for several years and it actually seems to have gotten rid of deepening lines, or at least making them much less visible. I love the literal warmth I feel when I spread it over my face. It has no smell, goes on smoothly, and you can feel it going to work. For me, this one is the best. I don't like spending money but this product is definitely worth it and not nearly as costly as some of the other products out there; and this one works.
Date published: 2016-07-05
Rated 5 out of 5 by from Wonderful find This product seems to be a miracle worker. I am shocked at the results I am getting after a week of use. I am 33 years old and suffer from redness and mild hormonal acne. I used this in the morning and at night and saw a change instantly. My acne has not increased, my redness has faded. The texture is softer, better tone noted as well. The lines on my brow and around my mouth are softening .It creates a healthy glow. I wear it under a face moisturizer at night because I have dry skin. Will really be lost if this product ever goes away. Please try this. It will benefit everyone!!
Date published: 2015-04-02
Rated 5 out of 5 by from Not for women only I am a 49-year-old man. People often guess I am much younger, but for years I could see marionette lines and crow's feet. Using twice a day as directed, the wrinkles pretty much disappeared within days, much sooner than one month! The serum doesn't help as much with my forehead's worry lines, but those are much deeper. I had no idea that any product could work so well, and I never tried to correct my wrinkles because I was always skeptical of the claims. I am grateful to Eli at the flagship store for his personal consultation and demonstration of recommended products like this one.
Date published: 2014-08-02
Rated 5 out of 5 by from love this product new to this line of skin care; first purchased thru QVC. Former Principal secret user and now a total devotee to Kiehl's. Compliments on my skin every day. Just read a review by a top 100 contributor named reviewer and this person is totally out of touch with their skin and these products. I will never go back to my former skin care products. My skin has never looked better and those tiny lines and wrinles are vanishing. When I first used the products from QVC the pumps kept breaking, but since purchasing directly from Kiehl's things working fine. I love, love, love these products.
Date published: 2011-06-15
Rated 4 out of 5 by from So far - awesome! I just started using the Powerful-Strength Line-Reducing Concentrate twice a day and in a short period of time (less than 2 wks) I have noticed a dramatic difference. My skin is so incredibly soft and bright and my makeup glides right onto my skin (now I need less coverage, so I use less foundation...that's $$ back in my pocket!). The warming sensation feels wonderful even in this summer heat. I use it morning and night after I wash my skin with the Ultra Facial Cleanser. At night I follow this product with the Midnight Recovery Concentrate, while in the morning I add the Ultra Facial Moisturizer SPF 30. Love that I added this product to my daily routine!! Thanks Kiehl's!!!
Date published: 2014-08-06
Rated 5 out of 5 by from It works, it really works I am 48 and have started to see crinkling lines on my neck as well as a deepening of the lines on my forehead, especially that irritating little line between my brows. I started using this product just two weeks ago. I am thrilled with my skin for the first time in years. The crapiness on my neck seems to have disappeared and the line between my brows is noticeably lessened. I am amazed. I have already started recommending Kiehl's products to my friends. I believe this is the most effective product I have ever used. I am a brand new, but now very dedicated Kiehl's user.
Date published: 2011-02-06
Rated 5 out of 5 by from This really works! I had been using the "BRIGHT" Hydrating botanical hydrating mask for such a long time and then Kiehls discontinued it. I was so upset but..."Danielle" showed me this line reducing concentrate and told me to try it. I was really skeptical AND...it was more expensive. I relectuantly put down my money and grumbled all the way home. Well...was I wrong. What a difference after 5 days I noticed that the deep line I have between my eyebrows had diminished siginificantly. I can barely see it and my skin is actually glowing and clear. I use it twice daily and a little bit goes a long way.
Date published: 2010-11-27
Rated 5 out of 5 by from Definite Purchase All of the Time!!!! After giving that title, I have to explain the results. As I have been using so many serums, creams, etc. for over 30 years I never received any "huge" compliments. Yes, my skin looks very good but after using the Line-Reducing Concentrate for a week or so, everyone thought I was pregnant as my "skin glowed"...well I was not pregnant lol so I give all of the credit to this product!!! My skin has definitely improved - there is no miracle for everyone but I can say that I am glad I made this purchase and I will continue to purchase. In fact, I now use the entire line and many other items from Kiehls.
Date published: 2014-01-15
Rated 5 out of 5 by from Love this! I recently did a lot of research looking for a serum that contained Vitamin C ... because of ALL the benefits I have read about. I found Kiehls and really liked what they were about.. Natural ingredients and that they believe you should try a product before you buy it. So I went to my nearest Kiehls store and got a sample of this product. The night after my first use my skin had a glow to it. Three nights after my first use I was hooked my skin was smoother, it looked clarified, and my glow was amazing. I have had so many people ask me what I was doing differently because I look great. I just bought my first bottle a couple days ago.. This is now my favorite skin care product! I cannot wait to try more from Kiehls!
Date published: 2012-01-09
Rated 5 out of 5 by from Well, now I'm hooked... Was using the Midnight Recovery Concentrate on its own for a while but wasn't seeing the results that I wanted. So glad that I took the plunge and purchased this. I use it underneath the Midnight and then I finish w/ the Ultra Facial Cream. I saw a VERY significant difference in my skin several days after I started it (I use it nightly). After a couple of weeks of use, two people told me that my skin looked "amazing" out of the blue and my sister asked if I had lost weight. She said that the contours of my face seemed more defined. She couldn't figure it out. That's all I need to hear! I feel like my face looks much brighter, smoother and healthier. I've only been using a few weeks now and I'm hoping it just continues to get better.
Date published: 2015-08-02
Rated 5 out of 5 by from Love it. I'm 27, and have some emerging wrinkles on my forehead exacerbated by two years of tropical sun (Peace Corps). I'm not a giant believer in skin products, but this stuff feels warm when I put it on and genuinely makes my skin look nice and my complexion more radiant and even. Is it working miracles? I'm not sure. Do I feel better about my face? Totally. The bottle lasts a while, too, and I got a teeny deluxe sample of the same thing to travel with. It also has a high concentration of pure Vitamin C, which is what everyone recommends for preventative skin health. Definitely recommend.
Date published: 2014-06-26
Rated 5 out of 5 by from Glowing I first got some in a sample and then I bought it in the larger size because I liked it. I am a 26 year old who just went through chemo for breast cancer and felt like I'd lost some of the glowy youthfulness in my face prior to treatment - not to mention gained a few wrinkles. I've been using it in the morning and at night under my moisturizer or serum. My skin is super sensitive and can break out with new product but I have had absolutely no problems with this one or any other kiehls products. In combination with the kiehls ultra face wash and midnight correcting serum, my skins never been better. I've had several people say I'm glowing and ask what I've been doing differently. I just point them to kiehls.com! So thanks kiehls, I'll be a returning customer for sure!
Date published: 2014-12-06
Rated 5 out of 5 by from BEST PRODUCT EVER I have been using this product for 3 months, and every month, I am seeing a definite improvement in the lines around my mouth. Also use on my neck with better results than Dr. Perricone's neck cream which didn't help me at all. It's a perfect treatment before you put on your moisturizer, pores look smaller and makeup glides on. My friends are always telling me what beautiful skin I have. They think it's genetic; well maybe a little, but Kiehl's is helping A LOT! Thanks for a great product.
Date published: 2010-12-07
Rated 5 out of 5 by from Perfect Product for my Combination Skin I use this product twice daily, and love it for it's light moisturizing anti-aging properties. I use this with the Facial Fuel Transformer at night, and alone in the mornings. It adds just enough moisture that I don't need an additional moisturizer in the mornings, and has a light scent that I don't find too feminine. I have a really oily t-zone with dry patches in my cheeks. This moisturizes dry areas, but not so much that my oily areas become shiny throughout the day. I love this product! It's the first product that doesn't over moisturize or under moisturize.
Date published: 2011-11-29
Rated 5 out of 5 by from Fantastic Serum I have used many serums for years, and have tried various brands. But Keihl's Line-Reducing Concentrate is one of the best. In my opinion, it is up there with my two other favorites: SkinCeuticals Phloretin CF and ReVive's Moisturizing Renewal System, both which are 3-5 times the price. My skin is clear--no breakouts, the tone is even, with no redspots. It clears up discoloration, and best of all, I think it really does reduce fine lines, and it definitely holds off on the creation of new fine lines. It is non-greasy and goes well under make-up to boot! I have been exceptionally pleased with this product, and just purchased my second bottle (in the biggest size).
Date published: 2014-05-21
Rated 5 out of 5 by from Can't Live Without This One! I use Kiehl's exclusively for my skin, body and hair care. If I had to choose only one product to use, this would be it. It makes my skin absolutely radiant! Although it can be used just to target fine lines and wrinkles, I use it all over to even out my skin tone. Pair it with Midnight Recovery...the results are amazing! I get compliments on my skin all the time and I have even converted some friends and family to Kiehl's. It is a wonderful product line! You can't go wrong!
Date published: 2012-01-19
Rated 5 out of 5 by from love this product i am on my second bottle of this and will definitely continue to use it. it has absolutely had noticeable effects on the texture of my skin! I always wonder if i should truly trust positive reviews of products, or if they are "real". well, this one is! I would sincerely urge you to try this product if you are interested in improving your skin texture and reducing lines. I am ver happy with the results. one other thing, a small amount goes a long way, so the value is also pleasing! i use it with the Super Multi Corrective Cream and they work great together.
Date published: 2014-01-15
Rated 1 out of 5 by from I so want to like this... Sadly I do have pretty sensitive skin, but as I age it seems to have relaxed a bit. I bought this with the highest of hopes and so excited to try it out. Also bought the Midnight Recovery Concentrate which I love! Within seconds of applying this product, the "warming" sensation was apparent. Then a stinging... and then burning, and unfortunately hives. Within 5 minutes I was frantically washing my face. I love Kiehl's and like I said, had the highest hopes for this product. But sensitive skinned ladies and gents beware! I have to return it :(
Date published: 2013-01-17
Rated 5 out of 5 by from Excellent product This is my first Kiehl's purchase, and I am impressed. I have used this for 5 weeks and LOVE it! It has significantly improved the texture of my skin, and has visibly reduced the lines on my forehead. My skin is sensitive but this hasn't irritated it at all, despite my generous application of the product. Other reviewers have complained about the pump getting clogged and not dispensing properly due to the lid not covering the opening - due to these reviews, I decided to store the product in the box it came in. I have had no problems with the pump!
Date published: 2011-06-12
Rated 5 out of 5 by from Remarkable I have been using this product regularly for a little over a month and the results are remarkable. I am still young (29) but am trying to be proactive about caring for my skin. After a month of using this serum twice a day (morning and evening) I could not be happier. My skin looks smoother, tighter, and more radiant. The beginnings of "crows feet" around my eyes are no longer visible. Several people have commented on how beautiful my skin looks. I will be keeping this in my skincare routine for a long time to come!
Date published: 2015-06-17
Rated 5 out of 5 by from My crow's feet and brow lines have disappeared! My partner and I walked into a Kiehl's store at the Gargen State plaza 2 weeks ago to purchase some Avacado eye cream which I can't live without! The gentleman at the counter asked me if I wanted a mini facial. I of coarse said "YES! PLEASE!" During the facial he told me that I seriously should consider purchasing the Powerful-line reducing concentrate. I did not buy it at the time but he gave me 3 samples of it to take home with me. I have used it everyday since and to my amazement, my crow's feet have all but vanished and the deep brow lines are gone. I honestly didn't think anything could get rid of them other than Botox. I am sold and have recommended this wonderful product to all of my friends! Thank you Kiehl's for helping me to look younger!!!!
Date published: 2012-09-13
Rated 4 out of 5 by from Nice results, but not a day-time product Although the instructions say that this should be used both day and night, I found it too sticky and glossy on my face to use during the day. At night, it works well and washes off easily in the morning. The smell is slightly bitter too - so if you are sensitive to smells or prefer a lighter scent, this could be a bit bothersome. Overall though, after several nights of using the product, I have noticed a nicer texture and radiance on my face (though not a huge effect on my lines as of yet).
Date published: 2011-05-19
Rated 5 out of 5 by from Made a Believer Out of me! I have never been fond of serums, but in the Kiehl's Acai Moisturizer I religiously use needed a moisturizing boost in late January/early February, and this is what was recommended. It is absolutely amazing! It went above and beyond as a moisturizer, and I have seen a complete difference in my skin!!! HIGHLY recommended. My only concern is the bottle. I do not enjoy having to turn it upside down and use a Q tip to get the remaining product when it starts to run low. There has to be a better way to package this miracle serum/moisturizer. On some days I choose to use it as my only moisturizer, since a) the box states it can and b) it moisturizes beyond belief!
Date published: 2011-07-08
Rated 1 out of 5 by from Horrible: bad batch or new formula? I've been using the line reducing concentrate for about 2 years and have been going back because I had liked it. I use to love the texture and it gave me a certain glow to my face that I liked. I bought it recently and either the formula changed or I got a bad batch and it's incredibly horrible. I am so disappointed in this product and will not re-purchase again. Texture felt almost grainy, similar to a face exfoliator which is completely unacceptable for a Kiehl's product and for this type of product in this price range. I'd expect such bad quality from a drugstore brand, but not Kiehl's.
Date published: 2014-11-03
Rated 5 out of 5 by from I love this product! It works! I saw reduced lines and overall improvement in skin. My coworkers (several of them) oddly asked me the same question: "Your skin is glowing, what are you using?" Disclaimer: I am using several great products from Kiehl's, but this produced dramatic results. You'll notice results the first time you use it ... it goes on like silk and leaves your skin so soft. I bought it for my 75-year-old mother, and my father swears her skin looks younger! At the grocery store, kids working at the checkout have started regularly asking me for my ID! ... What more can I say? It's good stuff.
Date published: 2010-09-26
Rated 5 out of 5 by from Just Buy It.... With 10.5% vitamin C, the Powerful-Strength Line-Reducing Concentrate packs a punch. There is a reason this product has been a fan favorite ever since it launched. Immediately I've noticed my skin getting smoother and my line lines diminishing. It's nice to see visual changes when spending so much on a product. This is definitely one that you know is working! You'll notice a slight warming sensation as soon as you apply this product - don't fret! It's just the vitamin C doing its job. As long as you skip the eye area, the warming will diminish almost instantly. And if you already love this product, pair it with the Midnight Recovery Concentrate for the most efficacious punch against aging. Tip: If you get the large bottle - Shake it up every so often.
Date published: 2016-04-25
Rated 5 out of 5 by from Good stuff I have been using this serum in the morning and night for over a month and I love the way my skin looks and feels. This serum gives my skin a beautiful glow and I see an improvement in my skin texture. I like the fact that this has Vitamin C in it and will be ordering this again when I run out. I must say this is not very hydrating so I do layer this under a moisturizer. I have oily/combo dry skin and I find that I do need a moisturizer over this product. I dispense two pumps and it is just enough product to cover my face I then follow with sunblock in the day and moisturizer at night. The 1.7 ounce bottle should last me a while with just two pumps twice a day I hope. I am very happy with this product so far.
Date published: 2015-11-13
Rated 5 out of 5 by from blown away by this one I went to the 2nd Ave store when this item was launching and the Kiehl's crew couldn't have been nicer or more generous with samples. I bought the concentrate and received a wonderful assortment of deluxe samples - yay. This product must be my ultimate favorite from now on. It feels a bit warm on contact with my skin but it's not intense or even tingling. It absorbs completely rather fast making a great foundation for an SPF during the day or a night cream before bed. After two weeks, my skin is incredibly soft and smooth. There is clarity and luminosity to it that wasn't there before. I definitely have a glow going on! Great packaging with a pump dispenser. Quite affordable as well. Extremely happy party of one here!
Date published: 2011-06-21
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