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Obagi Medical

Obagi Professional C Serum 20% - 30ml

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Helps Treat: Signs of premature ageing, including fine lines, wrinkles and an uneven complexion.

Feels Like: A highly concentrated antioxidant serum.

Recommended For: Those with Normal to Oily Skin looking to fortify and safeguard their youthful appearance.

As one of the Obagi Professional-C Serums, this serum contains the highest percentage of vitamin C (L-ascorbic acid). At 20% concentration of vitamin C, this is a strong yet gentle serum that is intelligently formulated to combat the signs of ageing and hyperpigmentation. This Obagi-C serum is perfect to add to your skincare routine if you are looking to achieve:

Vitamin C is a powerful antioxidant that works to protect your skin from free radicals which are generated in your skin during and after exposure to UV light from the sun throughout both the winter and the summer. In its L-ascorbic acid form, vitamin C can soak through the layers of your skin to offer its beneficial mechanism of action to the deeper layers. Here, its antioxidant properties can have a more pronounced effect in combating the visible signs of ageing, such as fine lines and wrinkles. By adding the Obagi Professional-C Serum to your skincare routine, your skin will enhance visibly. Combine the Obagi Vitamin C Serum with other Obagi skincare products to obtain a maximum effect. 

Topical application of vitamin C in the Obagi-C serums not only protects your skin from UV related damage and enhanced ageing, it plays a vital role in collagen production in your skin. Collagen is responsible for your skin's firmness and elasticity and so Obagi Professional-C 20% is designed to improve skin’s plumpness and promote a healthy youthful glow.


To enhance the skin-firming effects of L-ascorbic acid, the Obagi Professional-C Serum also contains hyaluronic acid. This is a clever molecule that binds to water in your skin and locks it in, preventing dryness and further encouraging a plump and rejuvenated look to your skin.  


Obagi Professional-C Serum 20% works to brighten the appearance of hyperpigmented skin and dark spots, to push a radiant and even skin tone. Not only does this serum improve skin tone, but the Obagi-C Serum works to enhance the skin’s texture as well. 

How to Use
Apply 5 to 7 drops of vitamin c serum to the face, neck and chest using fingertips. Apply to cleansed skin in the morning before sunscreen and makeup application. A slight tingling may occur in some people, which diminishes with continued use. Please note that it is normal for Vitamin C products to darken after opening due to air and light exposure. Any change in the colour does not affect the product's efficacy.
Key Ingredients
Propylene glycol, aqua, ascorbic acid, alcohol denat, ascorbyl glucoside, ethoxydgycol, phenoxyethanol, sodium hyaluronate, sorbitol, calcium hydroxide, zinc chloride, parfum, amyl cinnamal, benzyl benzoate, hexyl cinnamal, limonene
Key benefits
  • Prevents premature signs of ageing, including fine lines and wrinkles
  • Stimulates collagen production for firmer, more resilient skin
  • Lightens and brightens skin for more even tone
  • Firmer and plumper skin
  • Antioxidant protection from UV induced skin damage
  • Easily absorbed into the skin
  • Improves skin texture
  • Non greasy formula with no irritation


Firm, plump skin with an even complexion and reduced signs of premature ageing.



20% Vitamin C.


Apply 5 to 7 drops to the face, neck and chest using fingertips in the morning.



Obagi Professional-C® Serum offers maximum daily antioxidant protection and greater penetration than other Vitamin C products.


Obagi Professional C Serum 20% FAQ

    • When should I use vitamin C serum?
      • Vitamin C can be used twice a day under makeup or sunblock. It is easily absorbed by the skin to give 24-hour protection against free radical damage. When used under sunblock it will provide additional protection against sun damage and environmental stress on the skin so is essential for individuals with an outdoor lifestyle.
    • What are antioxidants?
      • Antioxidants are the skin’s natural anti-aging solution. They act by neutralizing the free radicals that cause damage to the collagen in the dermis layer.
    • When is the best time to apply serum to the face?
      • Serum can be applied during the day or night, after cleansing and patting dry. If you are applying at night, a thinner layer is recommended. Apply to cleansed skin in the morning before sunscreen and makeup application.
    • Can I use the serum every day?
      • The serum is safe to use daily. Professionals suggest using a serum on your face and neck twice a day, every day, as part of your skincare routine.
    • What percentage of Vitamin C is best for the skin?
      • This can depend on both the product and your skin, we recommend the sweet spot for vitamin c retention is around 1--20 percent. Making the Obagi Professional C Serum 20% ideal for those unsure of their skin type.

Obagi Professional C Serum 20% - 30ml Reviews