Allure Best of Beauty Award Seal 2025
SERUM 20%
SERUM 20%
SERUM 20%
SERUM 20%
SERUM 20%
SERUM 20%
BESTSELLER
4.6
Rated 4.6 out of 5 stars
193 Reviews

SERUM 20%

Vitamin C Serum For Normal to Oily Skin

Regular price $155.00
Size

SERUM 20%

Best for
Skin Discoloration - color
Skin Discoloration

Discover Obagi’s bestselling Professional C® Serum 20%, formulated with L-Ascorbic Acid and Sodium Hyaluronate. Fast-absorbing serum helps to brighten and even skin tone, reduce the appearance of dark spots, strengthen antioxidant defenses, and improve the appearance of fine lines and wrinkles. For a supercharged, hydrated glow and more youthful-looking skin. Ideal for normal to oily skin types.

  • 91% of users reported skin appeared bright and more hydrated*
  • Combats oxidative stress induced by blue light and infrared radiation** that cause early signs of skin aging
  • Formulated with L-Ascorbic Acid to brighten skin
  • Helps to neutralize free radicals

*Obagi survey analysis, Vitamin C products: April 28, 2010. Data on file at Obagi Cosmeceuticals LLC.

**2023 In-Vitro Antioxidant Potential Assay. Data on file at Obagi Cosmeceuticals LLC.

    How To Use

    • Step 1: Apply 5-7 drops in the morning after cleansing and toning, before moisturizer.
    • Step 2: Follow-up with SPF before makeup application.
    • Note: Use within 3-6 months of first opening.



    Storage

    • Store at controlled and consistent humidity and temperature not exceeding 25°C (77°F).
    • Keep out of direct sunlight.
    • Store in a dark, cool place after opening.
    • Keep cap on tightly when not in use.

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    • Product description
      Discover Obagi’s bestselling Professional C® Serum 20%, formulated with L-Ascorbic Acid and Sodium Hyaluronate. Fast-absorbing serum helps to brighten and even skin tone, reduce the appearance of d...
      Professional C® Serum 10% is formulated with L-Ascorbic Acid to help brighten and even skin tone, strengthen skin's antioxidant defenses and improve the appearance of fine lines and wrinkles withou...
      The Obagi-C Fx C-Clarifying Serum combines Vitamin C and Arbutin to enhance the appearance of even skin tone for a healthier-looking complexion.
    • Best for
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      Skin Types
    4.6
    Rated 4.6 out of 5 stars
    Based on 193 reviews
    193 reviews
    • Eve C.
      NH, United States
      Verified Buyer
      I recommend this product
      Age 45-54
      Gender Female
      Rated 5 out of 5 stars
      February 21, 2026
      Love

      The Serum goes on easily and creates an immediate smoothness and glow on my fair, dry skin that lasts.

      EffectivenessRated 5.0 on a scale of 1 to 5
    • Gina C.
      AL, United States
      Verified Buyer
      I recommend this product
      Age 55-64
      Gender Female
      Rated 5 out of 5 stars
      February 20, 2026
      Love it!

      The only reason I don't buy it all the time is the price. This product is a staple and a must. Feels great on my skin.

      EffectivenessRated 5.0 on a scale of 1 to 5
    • Avery
      I recommend this product
      Rated 5 out of 5 stars
      February 13, 2026
      5 Stars

      The ABSOLUTE best vitamin C on the market. Like I need 10 bottles of this. 20% is perfect for my skin type. I’ve never been able to find a vitamin C that works but i can assure you that obagis does. my skin has never been brighter or smoother. I will never use another skincare brand again.

    • Elaine T.
      AL, United States
      Verified Buyer
      I recommend this product
      Age Over 65
      Gender Female
      Rated 5 out of 5 stars
      February 11, 2026
      A NECESSITY!

      Most important items for your face and neck are vitamin c, retin A and sunscreen. I first purchased in my Derms office.

      I really like how it brightens my facial skin

      EffectivenessRated 5.0 on a scale of 1 to 5
    • A.C.
      FL, United States
      Verified Reviewer
      I recommend this product
      Age 55-64
      Gender Prefer not to disclose
      Rated 5 out of 5 stars
      February 11, 2026
      This product really works!!!

      I have been using Obagi for almost 24 years on and off. I am now turning 57 and have some sun damage, fine lines around my mouth, eyes and also deeper ones. I use self tanners and have noticed that they have left some discoloration. I began using this and the retinol .50 and after just using this again after almost a month, I noticed my discoloration has started to fade and my skin looks better. I have also received compliments and can feel the product working on me without harshness.

      There has been some peeling due to the retinol, but trust me, my pores are almost invisible and I am hooked - Give it a try!

      EffectivenessRated 5.0 on a scale of 1 to 5