Forgot your password?

Please fill in your details below
to get your new Kiehl's account password.

Thank You

Are you a current Kiehl's customer?


We have upgraded our Customer Portal!
Update your details with us or sign up if you are new to Kiehl's!

Are you a current Kiehl's customer?


Please fill in your details below
for your new Kiehl's account password.

Orange Peel
Powerful-Strength Line-Reducing Concentrate

Vitamin c
myth busters

TRUE OR FALSE?:Your skin produces its own Vitamin C

From boosting collagen production to diminishing the signs of aging to correcting dark spots, Vitamin C is a highly efficacious skincare ingredient with a wide range of benefits. With all of the myths and misinformation circulating about Vitamin C, it's important to learn the truth about the benefits of a Vitamin C serum.1

As pioneers in Vitamin C skin care for more than 13 years, Kiehl’s has extensive expertise in incorporating this potent ingredient at its most beneficial concentrations. Learn more about Vitamin C and how to choose the best Vitamin C products to integrate into your daily routine.

Mythbusters: The Truth About
Vitamin C Skin Care

Fact: Not All Vitamin C's are Created Equal

While different forms of Vitamin C have overlapping benefits, Kiehl’s often uses Pure Vitamin C (L-Ascorbic Acid) to diminish fine lines and wrinkles, Vitamin Cg to reduce the appearance of lines and wrinkles over time and Activated C for lightening and skin discolorations. Each Kiehl’s Vitamin C serum effectively incorporates a form of topical Vitamin C that is carefully selected to maximize its targeted efficacy.

Fiction: The More Vitamin C, the Better

When products have concentrations of L-Ascorbic Acid that are too high, skin can experience irritation. Kiehl’s selects the best forms of Vitamin C at concentrations that are both efficacious and gentle. Our products are then dermatologist-tested for safety, demonstrating the appropriateness of our formulas for all skin types, including sensitive skin.

Fact: Your Skin Needs Topical Vitamin C

Just as Vitamin C is an essential part of your diet, it is also an important step in your skincare routine. The human body does not produce its own Vitamin C but relies on obtaining it through nutritional and topical applications. Vitamin C benefits for skin include stimulating collagen production and neutralizing free radicals. Daily use of a balanced and stabilized Vitamin C facial serum will ensure that your skin soaks up all of the perks of this powerful ingredient.2

Fiction: Vitamin C Causes Skin Sensitivity to the Sun

In actuality, topical Vitamin C has been demonstrated to be a second line of defense against harmful UVA rays while also helping to bolster skin’s antioxidant defenses. We recommend applying a Vitamin C serum in the morning before adding SPF.3

"Before my patients leave their door, I tell them to apply an anti-oxidant rich product and an SPF 50 or higher. Vitamin C is a great anti-oxidant that provides a second layer of defense after sunscreen by neutralizing free radicals that can damage skin, accelerating signs of aging." -Dr. Adam Geyer, Kiehls Consulting Dermatologist

Fact: Vitamin C Products Benefit
All Types of Skin

The Vitamin C facial benefits extend to all skin types, including sensitive and dry skin. There are also effective formulations of Vitamin C serums that can help to correct dark spots and post-acne marks like the Clearly Corrective Dark Spot Solution.

Clearly Corrective Dark Spot Solution

Fiction: Vitamin C Serums are Not Suitable for Sensitive Skin

At Kiehl’s, our Vitamin C serums are designed to be gentle enough for sensitive skin. When first beginning to use facial Vitamin C skincare products, start with a once daily application and gradually build to twice a day. Always consult with your dermatologist when incorporating new skincare products into your routine.

Fact: Store Your Vitamin C Serum
in a Cool, Dry Place

Store L-Ascorbic Acid serums like Powerful-Strength Line-Reducing Concentrate in a place other than your bathroom cabinet as they are best kept in an area without humidity. Additionally, the best Vitamin C serums are kept in dark-colored or amber bottles that effectively protect the formula from light.

Powerful-Strength Line-Reducing Concentrate

Fact: Apply Vitamin C Serums Before Your Moisturizer

After you cleanse and tone your skin, apply a thin layer of Vitamin C serum. Smooth it on morning and night before your moisturizer to lock in Vitamin C benefits for skin.

Vitamin C Serum Benefits

  • Diminishes Visible Signs of Aging Including Fine Lines and Wrinkles
  • Minimizes the Appearance of Dark Spots
  • Hydrates and Firms for Improved Radiance and Texture

Forms of Vitamin C

Pure Vitamin C

L-Ascorbic Acid or Pure Vitamin C is a powerful skincare ingredient. This potent form of Vitamin C easily absorbs into skin and begins working immediately. A dermatologist-recommended ingredient, L-Ascorbic Acid is frequently used in anti-aging products to improve radiance and skin texture while diminishing the appearance of fine lines, wrinkles and crow’s feet. Kiehl’s Dermatologist Solutions Powerful-Strength Line-Reducing Concentrate uses 10.5% of Pure Vitamin C. L-Ascorbic Acid is also found in Powerful-Strength Line-Reducing Eye-Brighteing Concentrate

Vitamin Cg

Ascorbyl Glucoside is a potent derivative of Vitamin C that boosts collagen production, provides antioxidant protection and helps to minimize the visible signs of aging. Vitamin Cg activates once absorbed into skin to boost Vitamin C activity overtime. In Kiehl’s Powerful-Strength Line-Reducing Concentrate, 2% of Vitamin Cg is included to enhance the efficacy of Vitamin C benefits over time. It is also found in the Facial Fuel Energizing Moisture Treatment for Men.4

Activated C

Activated C is a next-generation Vitamin C derivative that is highly efficacious. This powerful form of Vitamin C penetrates skin and is proven to effectively fade acne marks and age marks and reduce skin discolorations. Activated C is a key ingredient in the Clearly Corrective Collection from Kiehl’s including Clearly Corrective Dark Spot Solution, Clearly Corrective Brightening & Soothing Treatment Water and Clearly Corrective Brightening and Smoothing Moisture Treatment.

Clearly Corrective Collection Solution


  1. Collagen Metabolism. Diegelmann, RF. 5, 2001, Wounds, Vol. 13.
  2. Topical Vitamin C in aging. Colvin, RM and Pinnell, SR. 1996, Clin Dermatol, Vol. 14, pp. 227-234.
  3. Enzymatic and non-enzymatic antioxidants in epidermis and dermis of human skin. Shindo, Y, et al. 1994, J Invest Dermatol, Vol. 102, pp. 122-124.
  4. Double-Blind, Half-Face Study Comparing Topical Vitamin C and Vehicle for Rejuvination of Photodamage. Fitzpatrick, R and Rostan, E. 3, 2002, Dermatol Surg, Vol. 28, pp. 231-236. Topically Applied Vitamin C Enhances the mRNA Level of Collagens I and III, Their Processing Enzymes and Tissue Inhibitor of Matrix Metalloproteinase 1 in the Human Dermis. Nusgens, BV, et al. 16, 2001, J Invest Dermatol, Vol. 116, pp. 853-859.
Sign In
Remember me

Don't have an account?

Kiehl's Rewards


When you become a Rewards member, your purchases earn you complimentary treats, exclusive offers, and surprise gifts.MORE REWARDS. MORE TO LOVE.

How It Works
  • Kiehl's Join

    Simply spend RM250 nett & above in a single receipt at any Kiehl's store.

  • Kiehl's Membership

    Member year starts the day you enroll in Kiehl's Rewards and lasts for 365 days.Points Validity = 1 Year

  • Kiehl's Rewards

    Once you've enrolled in Kiehl's Rewards, start accumulating points by making purchases at any Kiehl's store.

    • RM 1 = 1 point**
    • Welcome gift***
    • RM 100 Kiehl's voucher for your next day purchase for every RM 1000 nett & above spent****
    • 10% discount & birthday gift during your birthday month*****

*Strictly for Malaysian only. Others are subject to management approval upon proof of permanent residency in Malaysia.
Please write in to [email protected] & attach copy of your employment/student/permanent resident visa.
**Points will be reflected in your receipt & account one (1) day after a purchase is made.
***Available upon next visit (within 60 days from first visit), consists of 1 travel-size sample.
****RM100 Kiehl's voucher will be valid for 60 days from the redemption date. After 60 days, STRICTLY no extension is allowed.
For redemption, customers will need to show IC for verification. No representative is allowed to redeem on behalf.
*****10% birthday discount is valid on the NEXT purchase if member joins during birthday month. 1 x use only.