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
187 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.

    Looking for professional guidance?

    Looking for professional guidance?

    Find a Physician

    Compare Serums & Treatments

      Currently viewing

    • Allure Best of Beauty Award Seal 2025
      SERUM 20%
      SERUM 20%
      BESTSELLER
      4.6
      Rated 4.6 out of 5 stars
      187 Reviews
      SERUM 20%
      Regular price $85.00 - $155.00
      SERUM 10%
      Professional-C Serum 10% new packaging, same transformational product. Before and after on grey background
      4.2
      Rated 4.2 out of 5 stars
      34 Reviews
      SERUM 10%
      Regular price $60.00 - $115.00
      FX C-CLARIFYING SERUM
      C-Clarifying Serum Fx Open Cap
      4.2
      Rated 4.2 out of 5 stars
      21 Reviews
      FX C-CLARIFYING SERUM
      Regular price $145.00
    • 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
      Skin Discoloration - color
      Skin Discoloration
      Skin Discoloration - color
      Skin Discoloration
      Sensitive Skin - color
      Sensitive Skin
      Skin Discoloration - color
      Skin Discoloration
      Skin Types
    4.6
    Rated 4.6 out of 5 stars
    Based on 187 reviews
    187 reviews
    • Lindsey
      Verified Reviewer
      I recommend this product
      Age 35-44
      Gender Female
      Rated 5 out of 5 stars
      February 2, 2026
      It works stay the course!

      so I was very hesitant to buy this reading some reviews that I read I bought it in about October. I didn’t start to see results until December my sun spots significantly I mean significantly lightened! To wear when I put on makeup now they don’t show through. My skin has more of a glow to it and the wrinkles on my forehead. They’re still there, but they are not as prominent i’m in my 40s and I definitely get a lot of compliments on my skin for my age. So far, this is the best product that I’ve used for sunspots.! Stay the course then you will see results apply every night before bed let it dry then put a good face cream over top .

      EffectivenessRated 5.0 on a scale of 1 to 5
    • Gill W.
      AL, United States
      Verified Buyer
      I recommend this product
      Age 55-64
      Gender Female
      Rated 5 out of 5 stars
      February 1, 2026
      Really nice product

      Excellent product I feel my skin is glowing more and feels more hydrated

      EffectivenessRated 5.0 on a scale of 1 to 5
    • Colleen C.
      OH, United States
      Verified Buyer
      I recommend this product
      Age 55-64
      Gender Female
      Rated 5 out of 5 stars
      January 24, 2026
      Love this! Better than skinceuticals!

      Best on market

      EffectivenessRated 5.0 on a scale of 1 to 5
    • Christi
      I recommend this product
      Rated 5 out of 5 stars
      January 23, 2026
      5 Stars

      Best vitamin c serum on the market

    • Daniel M.
      CA, United States
      Verified Buyer
      I recommend this product
      Age 35-44
      Gender Male
      Rated 5 out of 5 stars
      January 17, 2026
      Amazing serum

      This is my second bottle. I am amazed about the smell, efficacy and quality.

      1. The smell is great. Usually when I buy a vitamin c it usually smells like I’m putting battery fluid.

      2. Since it’s my second bottle, I know it’s slow process but I do notice it’s no irritation (redness or acne flare ups)

      3. This vitamin c will last you more than a month without looking its quality.

      4. Lastly, the customer support has been incredible. Yes you are paying $155 or so but you won’t go wrong.

      EffectivenessRated 5.0 on a scale of 1 to 5