Obagi Medical Professional-C Vitamin C Serum 20% — 1 fl oz for Normal to Oily Skin, lightweight antioxidant

Obagi Professional‑C Serum 20% is a potent topical antioxidant serum formulated with 20% L‑ascorbic acid to brighten skin tone, support texture, and help defend against environmental oxidative stress.

This concentrated vitamin C formula from Obagi Medical is designed for daily topical use on normal to oily skin types seeking stronger antioxidant protection and improved surface clarity. The serum uses a delivery system engineered for deeper penetration of L‑ascorbic acid so active vitamin C reaches multiple skin layers. Lightweight and fast‑absorbing, it layers under sunscreen and makeup and fits into morning or evening routines.

How does this 20% Vitamin C serum help my skin?

The high concentration of L‑ascorbic acid provides antioxidant activity that supports visible improvement in skin brightness and overall clarity. Regular use can reduce the look of uneven tone and refine surface texture, while the formulation includes ingredients that help hydrate and support skin structure.

• 20% pure L‑ascorbic acid for strong antioxidant potency
• Targets dullness and visible discoloration for a more even appearance
• Hydrating components help improve skin texture and softness
• Designed to work with sunscreen and other daily skincare steps

Is this serum suitable for sensitive or reactive skin?

Although the product is optimized for normal to oily skin, Obagi’s delivery system and supportive ingredients are intended to increase tolerability. Start slowly if you have sensitive skin and patch test first to assess comfort and response.

• Begin with every‑other‑day application to evaluate tolerance
• Perform a small patch test behind the ear or inside the forearm
• Discontinue if persistent irritation occurs and consult a dermatologist

How should I incorporate it into my skincare routine?

Apply a few drops to clean, dry skin in the morning or evening before heavier creams. Follow with a moisturizer and broad‑spectrum sunscreen in daytime routines to protect skin and support antioxidant benefits.

• Use after cleansing and toning, before moisturizer
• Allow serum to absorb fully before applying sunscreen or makeup
• Use consistently for several weeks to observe visible improvements

What results can I reasonably expect and over what time frame?

Consistent application can lead to improved brightness, more even tone, and smoother texture over weeks. Individual results vary based on skin type, frequency of use, and concurrent skincare products.

• Noticeable brightness and tone improvement commonly seen within 4–12 weeks
• Texture refinement develops with ongoing use and supportive moisturization
• Combining with daily sunscreen helps maintain visible improvements

Who is this for: Obagi Professional‑C Serum 20% is aimed at individuals with normal to oily skin who want a high‑strength topical antioxidant to address dullness, uneven tone, and surface texture. It suits users comfortable introducing a potent vitamin C into their routine who will patch‑test first and pair the serum with daily sun protection and hydrating products.

Ingredients

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