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
239 Reviews
PROFESSIONAL-C® ,

SERUM 20%

Vitamin C Serum For Normal to Oily Skin

$155.00
Size
SERUM 20%

SERUM 20%

Free 30-Day Returns

Best for
Skin Discoloration - color
Skin Discoloration
Skin Types: Normal to OilyCombination

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.

Best of Beauty - SKIN - Best Antioxidant Facial Serum by Allure, 2025

Editor's Choice Awards - Dermatologist Favorite Vitamin-C Serum by Oprah Daily, 2025

    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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    • Allure Best of Beauty Award Seal 2025
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      4.6
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      239 Reviews
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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
      Skin Discoloration - color
      Skin Discoloration
      Skin Discoloration - color
      Skin Discoloration
      Sensitive Skin - color
      Sensitive Skin
      Skin Discoloration - color
      Skin Discoloration
      Skin Types
      Normal to OilyCombination
      Normal to DryCombination
      Normal to OilyNormal to DryCombination
    4.6
    Rated 4.6 out of 5 stars
    Based on 239 reviews
    Reviews Summary
    Customers say this serum applies smoothly and absorbs quickly without leaving skin greasy. Many report immediate brightening effects and a noticeable glow that lasts throughout the day. Users frequently mention improvements in skin tone evenness, with several noting reduced appearance of dark spots and fine lines over time. The lightweight texture and pleasant scent are commonly praised. Some customers mention it can be slightly drying, particularly when switching from lower concentrations. A few users note concerns about product consistency between bottles, with some receiving clearer formulations than expected. Despite the higher price point, most find the results justify the cost and consider it a skincare staple.
    Write a Review (Opens in a new window)
    239 reviews
    • CAROLINE
      I recommend this product
      Rated 5 out of 5 stars
      July 7, 2026
      5 Stars

      Have been using for about 2 weeks and already see improvement on dark spots. Very happy wirh results! A little goes a long way.

      Was this helpful?
    • Sandra K. P.
      GA, United States
      Verified Buyer
      I recommend this product
      Age Over 65
      Gender Female
      Rated 5 out of 5 stars
      July 6, 2026
      Great Product!

      Worth every penny!

      EffectivenessRated 5.0 on a scale of 1 to 5
      Was this helpful?
    • patricia h.
      TX, United States
      I recommend this product
      Age Over 65
      Gender Female
      Rated 5 out of 5 stars
      July 4, 2026
      This is a miracle in a bottle

      I’ve tried everything to no avail. Obaji 20% C serum is definitely a game changer. Within 2 weeks my skin went from large dark spots into a huge healing process- I watched the large dark spots break down. My skin texture hasn’t been this smooth and moist in years. I use this miracle in a bottle every morning and night, right after cleansing and toning, directly onto the skin. Let it absorb before putting on your skincare routine. It works on your hands too. Use the Obaji Sunscreen everyday, sometimes 2x and wear your sexy sun hat and sunglasses. I use the tinted sunscreen. Let the sunscreen absorb, it’s pretty, like makeup. Apply your lip liner and gloss. Very nice

      EffectivenessRated 5.0 on a scale of 1 to 5
      Was this helpful?
      Obagi
      July 15, 2026

      Hi Patricia,
      Thank you for sharing your experience—we’re thrilled to hear you’re seeing results. Consistency is key, and we’re glad this product has become part of your routine.

    • Deborah M.
      GA, United States
      Verified Buyer
      I recommend this product
      Age Over 65
      Gender Female
      Rated 5 out of 5 stars
      July 2, 2026
      Serum 205

      This is my go to first thing before applying anything else. Definitely notice much brighter skin.

      Highly recommend.

      EffectivenessRated 5.0 on a scale of 1 to 5
      Was this helpful?
    • Becky G.
      AL, United States
      Verified Buyer
      I recommend this product
      Age 55-64
      Gender Female
      Rated 5 out of 5 stars
      July 2, 2026
      Love this!

      This serum is the best thing I use for my face! I highly recommend it !

      EffectivenessRated 5.0 on a scale of 1 to 5
      Was this helpful?
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