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Mythbusters: The Truth about How Vitamin C Serum Benefits Your Skin

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.I With all of the myths and misinformation circulating about Vitamin C, learn the truth about the benefits of using a Vitamin C serum for your skin.
Kiehl’s became pioneers in Vitamin C skincare when our chemists stabilized 10.5% Vitamin C in our potent Vitamin C serum. This customer-favorite formula is formulated with 12.5% Vitamin C* and Hyaluronic Acid and penetrates skin’s deeper surface layers to help visibly reduce lines and wrinkles, minimize the appearance of pores, help firm skin, and boost radiance. With 10.5% L-Ascorbic Acid and 2% Vitamin Cg, the antioxidant Vitamin C in our patented formula remains in skin for up to 6 days.
Learn more about this trusted ingredient and how to choose the best Vitamin C products to use in your daily skincare routine.

Types of Vitamin C in Skincare

Pure Vitamin C

L-Ascorbic Acid, or Pure Vitamin C, is a powerful skincare ingredient that easily absorbs into skin and begins working immediately. A dermatologist-recommended ingredient, L-Ascorbic Acid is frequently used in anti-aging skincare products to improve radiance and skin texture while helping to diminish the appearance of fine lines, wrinkles and crow’s feet.


Vitamin Cg

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. Kiehl’s Powerful-Strength Line-Reducing Concentrate is formulated with 2% Vitamin Cg to help enhance the efficacy of Vitamin C benefits over time.IV It is also found in our customer-favorite men’s moisturizer.


*With 10.5% Pure Vitamin C and 2% Vitamin Cg
I Collagen Metabolism. Diegelmann, RF. 5, 2001. Wounds, Vol. 13.
II Topical vitamin C in aging. Colvin, RM and Pinnell, SR. 1996, Clin Dermatol, Vol. 14, pp. 227-234.
III 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.
IV Double-blind, half-face study comparing topical vitamin C and vehicle for rejuvenation of photodamage. Fitzpatrick, RE. and Rostan, EF. 3, 2002. Dermatol Surg. Vol. 28, pp. 231-236.

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