What makes the Obagi Medical Professional-C 20% Vitamin C Antioxidant Serum so effective for brightening and anti-aging?

The Obagi Medical Professional-C 20% Vitamin C Antioxidant Serum is a customer favorite because it's packed with 20% L-Ascorbic Acid, a potent form of Vitamin C known for its brightening power. It also contains Sodium Hyaluronate to hydrate. This powerful combination works to visibly reduce dark spots, even out skin tone, and improve the appearance of fine lines and wrinkles, giving you a more youthful and radiant complexion. Plus, it helps defend your skin against everyday environmental stressors like blue light and infrared radiation.

I have normal to oily skin. Is this Obagi Professional-C 20% serum suitable for me?

Yes, this Obagi Medical Professional-C 20% Vitamin C Antioxidant Serum is specifically formulated to be ideal for normal to oily skin types. Its fast-absorbing texture means it won't feel heavy or greasy. Many users with these skin types love how it makes their skin feel brighter and more hydrated without causing excess oiliness.

How soon can I expect to see results from using this Vitamin C serum?

While individual results can vary, many users report noticing brighter and more hydrated skin shortly after starting to use the Obagi Medical Professional-C 20% Vitamin C Antioxidant Serum. Consistent daily use is key to seeing improvements in dark spots, fine lines, and overall skin tone. Remember, it's working to boost your skin's antioxidant defenses over time.

I'm interested in the Obagi Professional-C 20% serum, but I'm concerned about irritation. What should I know?

It's understandable to be cautious with potent Vitamin C serums. The Obagi Medical Professional-C 20% Vitamin C Antioxidant Serum is formulated for efficacy, and the 20% concentration is quite high. If you're new to Vitamin C or have sensitive skin, you might consider starting with a lower concentration serum from Obagi or discussing it with your dermatologist. For most, the benefits of brightening and anti-aging are well worth it, especially since it also hydrates.

Obagi Medical 20% Vitamin C Antioxidant Serum in blue glass bottle with dropper

Obagi Medical skincare set with gift-with-purchase cleanser and toner on a purple background.

Obagi Professional-C Serum 20% Vitamin C for bright, hydrated skin — 91% user-reported results

Obagi Medical Professional-C 20% Vitamin C Serum new packaging, same antioxidant formula

Load video: Obagi Medical Professional-C 20% Vitamin C Antioxidant Serum

Applying golden facial serum under eye with dropper for skincare routine

OBAGI Medical Professional-C 20% Vitamin C Antioxidant Serum in blue glass bottle with dropper, held by hand

Obagi Medical Professional-C Serum with 20% Vitamin C in a blue dropper bottle on striped surface

Obagi Medical Professional-C Serum bottles with droppers, featuring 10%, 15%, and 20% L-Ascorbic Acid vitamin C formulas

Obagi Medical Professional-C 20% Vitamin C Antioxidant Serum

Obagi Medical Professional-C 20% Vitamin C Antioxidant Serum

Name: Obagi Medical Professional-C 20% Vitamin C Antioxidant Serum
SKU: 362032050119
Price: 155.0 USD
Availability: InStock

$155.00

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October Obagi Medical Gifts With Purchase: Receive a complimentary travel-size Nu-Derm Gentle Cleanser + Toner Duo with your $150+ Obagi Medical purchase.

Obagi Medical Professional-C 20% Vitamin C Antioxidant Serum

Obagi Medical Professional-C 20% Vitamin C Antioxidant Serum is a fast-absorbing vitamin C serum formulated for normal to oily skin. With 20% L-Ascorbic Acid and Sodium Hyaluronate, it helps brighten the appearance of skin, even the look of skin tone, and support a hydrated glow.

Use this concentrated antioxidant serum when your routine needs a targeted boost against dullness. Consistent use helps improve the appearance of dark spots, fine lines, and wrinkles while supporting skin’s antioxidant defenses.

Key benefits

Formulated with 20% L-Ascorbic Acid to brighten the appearance of skin
Helps improve the look of dark spots, fine lines, and wrinkles
Contains Sodium Hyaluronate to support hydration
Fast-absorbing texture suited to normal to oily skin
Helps neutralize free radicals and support antioxidant protection

How to use

Apply 5–7 drops in the morning after cleansing and toning, before moisturizer. Follow with broad-spectrum SPF. Use within 3–6 months after opening.

Product highlights

91% of users reported that their skin appeared brighter and more hydrated*
2025 Allure Best of Beauty Award Winner

*Obagi survey analysis, Vitamin C products, April 28, 2010. Data on file at Obagi Cosmeceuticals LLC.

Antioxidant testing also evaluated oxidative stress induced by blue light and infrared radiation. 2023 in-vitro antioxidant potential assay, data on file at Obagi Cosmeceuticals LLC.

Application

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.

Ingredients

Propylene glycol, aqua/water/eau, ascorbic acid, alcohol denat., ascorbyl glucoside, ethoxydiglycol, sorbitol, sodium hyaluronate, fragrance (parfum), citrus aurantium dulcis (orange) peel extract, citrus paradisi (grapefruit) fruit extract, phenoxyethanol, calcium hydroxide, zinc chloride, citric acid, caprylyl/capryl glucoside, amyl cinnamal, limonene, hexyl cinnamal, benzyl benzoate.