Obagi Medical

Obagi Professional-C Serum 20%



Give your skin a healthy dose of Vitamin C with Obagi Professional-C, the strongest concentration of the powerful, anti-aging ingredient. The L-ascorbic acid penetrates deep into the skin to repair collagen and elastin for smoother and younger-looking skin. The antioxidant brightens areas affected by hyperpigmentation and it evens tonal discoloration. Hyaluronic Acid was thoughtfully added to the serum in order to maintain hydrated skin that does not dry out as the serum absorbs and settles. The strong, 20% concentration of Obagi Vitamin C is appropriate for all skin types, but more specifically, is best for those who have worked up a tolerance to Vitamin C or who do not have sensitive skin.

  • Vitamin C, a potent antioxidant, combats free-radicals that cause skin damage
  • 20% L-ascorbic acid is the highest Obagi C Serum concentration
  • Collagen production is promoted for a smoother skin texture

Is the 20% concentration too high? Consider the Obagi Professional-C Serum with 10 Percent or Obagi Professional-C 15 Percent concentration. 

Obagi Vitamin C Serum Details

Ideal For: All skin types

Size: 1 fl oz / 30 ml

How to Use Obagi Vitamin C Serum

Apply 5 to 7 drops of Obagi Professional-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.


Propylene glycol, water, l-ascorbic acid, alcohol, ascorbyl glucoside, ethoxydiglycol, phenoxyethanol, Sorbitol, sodium hyaluronate, zinc chloride, calcium hydroxide, fragrance

obagi skin care

Customer Reviews

Based on 5 reviews
Vit C

Solid product, but a bit too strong for my skin. I found the 15% to be better suited for me.

Maggie W.
My favorite serum

Love this Obagi product. The people at the store even waited so I could pick it up same day.


Definitely one of my favorite vitamin c products. I did not find it hard at all to transfer to the 20% level. 7 drops covers my face and neck. I love pressing it into my skin! It definitely gives me brightness and glow. Well worth the price and it lasts a long time. There is no adverse smell like with some other vitamin c products.

Kylie Miller
Great product but terrible packaging

I use this Vitamin C because of its price point. I notice a change in my skin when I use it. However, the dropper is pure crap. I’m on my 3rd bottle and on everyone, the black rubber top comes out. Not good but yet I keep repurchasing. Again, fantastic serum but terrible packaging. Hope they fix this!

Vitamin C

This is a really good Vitamin C product with 20% L--ascorbic acid. It needs to be kept in a cool dark place so that it doesn't oxidize too fast. The dropper is good, though sometimes I find it doesn't seal well. I would repurchase, however, my skin likes Tetrahexyldecyl Ascorbate better.