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 7 reviews

Harben House is always great! They ship so fast and products are always great! Love the Obagi Vitamin C-20%! Really makes my skin glow. I have sensitive skin and have no problems with the 20%. The Obagi Vitamin C is definitely one of my top 2 Vitamin C serums! I will buy again.

Like this Vitamin C serum a lot!

I really like this Obagi Vitamin C serum 20% a lot. I don’t know that this is my very favorite medical grade Vitamin C, but it definitely is in my top 3! I like the price tag a lot more too compared to my #1 who shall not be named! This serum makes my skin glow!!! No bad smell, and absorbs into my skin well! It works well with my other skincare. I have found that it does well with my other am-morning skincare routine. I just let each product dry a min or 2 before applying the next product. I promise the process doesn't take as long as it looks! Here is my typical routine for all my fellow sensitive skin girls out there: 1) wash face with sensitive skin non-foaming cleanser, 2) apply Skinmedica Brightening pads to face and neck EVERY OTHER morning (per my dermatologist rec- for MY skin, most people use this product every day) 3) Metronidazole cream (for Rosacea), 4) Eyecream-I switch between Neocutis Firm Riche, Revision C+ Brightening (newer product from Revision), Epionce eye cream, and Skin better eye products,-Haven’t found the “one” yet, 5) Obagi Vitamin C, 20%, 6) Epionce renewal face lotion-I wish Harben House would start carrying this brand/line! I love it! 7) Elta Md sunscreen 46 spf, then makeup if wearing makeup that day. I have very sensitive skin, Rosacea, etc. just very sensitive to a lot of things! I can get rashy easily on my face with any one skincare product. Anything that doesn’t agree with my skin! So I have to be careful! I have bought a lot of expensive products that have been wasted bc of my sensitive skin :( but this is NOT one them. I tolerate the 20% well. I highly recommend giving the Obagi Vitamin C 20% serum a try if you are looking for a Vitamin C serum and want glowy, healthy looking skin!

I just want to say I love Harben House. I trust them and their storage of products, quality of products, expiration etc. etc. They ship super fast, are always on top of your order, no slow waiting period on what you ordered, and you always get beautifully packaged/wrapped products, and samples of something new you might not have tried, or something you already love! Great company! Sorry my review is so long!! I just know when I read reviews I really like detail!
A very sensitive skin girly

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.