Obagi Medical Professional C Serum 20% Vitamin C Facial Serum, 1.0 fl oz — High‑Strength L‑Ascorbic Acid for Normal to Oily Skin,

Obagi Professional C Serum 20% is a high-strength L-ascorbic acid facial serum formulated to deliver concentrated vitamin C for improving skin tone, texture, and visible signs of aging.

This 1.0 fl oz serum from Obagi Medical brings a 20% concentration of pure L-ascorbic acid in a delivery system designed for deeper penetration and enhanced stability. It is made for normal to oily skin types but provides hydration and antioxidant support that can help reduce the appearance of texture irregularities and uneven tone. The formula is intended to complement daily skincare routines by working with sunscreen and other treatments to preserve skin appearance.

How does this 20% vitamin C serum affect skin tone and texture?

The concentrated L-ascorbic acid targets areas of discoloration and uneven texture by promoting surface renewal and supporting the skin’s natural defenses. Regular use can help even out the look of skin tone while providing lightweight hydration suitable for normal to oily skin.

• 20% L-ascorbic acid concentration for visible brightening effects
• Superior delivery system for deeper ingredient penetration
• Formulated to improve skin texture and tone without heavy oils

Will this serum work with my daily sunscreen and other treatments?

Yes — vitamin C serums are commonly used in morning routines beneath broad-spectrum SPF to provide antioxidant support against environmental stressors. Because the Obagi Professional C Serum is a potent pure L-ascorbic acid formula, apply sunscreen after it fully absorbs and avoid combining it with other strong actives without professional guidance.

• Apply on clean skin, allow absorption, then follow with sunscreen
• Compatible with many moisturizers; use caution with retinoids or acids
• Recommended to patch-test when combining multiple active treatments

How should I introduce a 20% vitamin C serum into my routine safely?

Start by using the serum every other day or every third day, then increase frequency as tolerated to daily use. Because the formula is highly concentrated, begin with small amounts and observe skin response, especially if you have reactive or sensitive skin.

• Begin with a small pea-sized amount, applied to face and neck
• Use morning or evening; pair with gentle cleansers and hydrators
• Discontinue or reduce use if persistent irritation occurs

What performance and formulation features set this formula apart?

Obagi’s Professional C Serum 20% combines a high dose of L-ascorbic acid with a delivery system designed for enhanced skin penetration. The lightweight texture absorbs quickly, delivering hydration while aiming to support firmness and overall skin appearance.

• Concentrated 20% L-ascorbic acid for antioxidant support
• Superior delivery system for improved ingredient penetration
• Designed to support collagen-stimulating pathways and skin firmness
• Suitable for normal to oily skin, with hydrating properties for balance

Who is this for: Obagi Professional C Serum 20% is intended for adults with normal to oily skin who want a high-strength vitamin C treatment to address uneven tone, surface texture, and early signs of aging without a heavy or oily finish. If your skin is very sensitive or you use multiple high-strength actives, consult a skincare professional for tailored advice. Incorporate the serum gradually, pair it with daily SPF, and store it according to instructions to maintain potency.

Ingredients

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