OBAGI - Professional-C® Serum 10%

Obagi Professional-C Serum 10%: Pure Vitamin C for Brighter, Smoother Skin

Obagi Professional-C® Serum 10% is a concentrated daily antioxidant serum formulated with 10% pure L-ascorbic acid, the most biologically active form of vitamin C used in skincare.

Developed as the introductory strength within Obagi’s Professional-C range, it delivers advanced antioxidant, brightening and visible age-defying benefits in a concentration particularly suited to dry, sensitive or vitamin C-naive skin.

The lightweight formula absorbs rapidly and helps defend the complexion against free radicals generated by ultraviolet exposure and environmental stress. With consistent use, it promotes brighter, smoother and more even-looking skin while improving the appearance of fine lines and wrinkles.

What Does Obagi Professional-C Serum 10% Do?

• Brightens dull and tired-looking skin.
• Promotes a more even-looking complexion.
• Helps improve the appearance of fine lines and wrinkles.
• Supports visibly firmer, smoother-looking skin.
• Provides daily antioxidant protection against environmental free radicals.
• Helps reduce the visible effects of photo-ageing.
• Uses pure L-ascorbic acid in a lightweight, fast-absorbing serum.
• Provides an accessible starting concentration for new vitamin C users.
• Is particularly well suited to normal-to-dry and sensitive skin types.

10% Pure L-Ascorbic Acid

L-ascorbic acid is the pure, active form of vitamin C. It is widely used in advanced skincare because it performs several complementary functions within one ingredient.

Antioxidant Defence

Environmental exposure can generate free radicals that contribute to visible skin ageing, dullness, uneven tone and loss of resilience. L-ascorbic acid helps neutralise these reactive molecules, strengthening the skin’s daily antioxidant defence.

Brighter, More Even-Looking Skin

Vitamin C helps improve the appearance of dullness, discolouration and uneven tone. Regular use supports a clearer, more luminous complexion and can help minimise the visible effects of accumulated sun exposure.

Fine Lines and Firmness

L-ascorbic acid supports the biological processes associated with healthy collagen. Within a consistent skincare routine, Obagi Professional-C Serum 10% helps improve the appearance of fine lines, wrinkles, firmness and overall skin smoothness.

Why Start with the 10% Strength?

Obagi produces Professional-C Serum in three concentrations so that vitamin C can be matched more closely to skin type, tolerance and experience.

The 10% formulation provides meaningful antioxidant and brightening activity while offering the most accessible introduction to pure L-ascorbic acid within the range. It is particularly relevant for:

• First-time users of concentrated vitamin C.
• Dry or sensitive skin.
• Skin showing early signs of environmental ageing.
• Dullness and mild uneven-looking tone.
• Anyone seeking daily antioxidant protection in a lower-strength formula.

Users who are already comfortable with pure vitamin C may consider Obagi Professional-C Serum 15%. The maximum concentration in the range is Obagi Professional-C Serum 20%, developed for experienced users and normal-to-oily skin.

Read our complete Obagi Professional-C 10% vs 15% vs 20% strength guide for a detailed explanation of the three formulations.

Who Is Obagi Professional-C 10% For?

This serum is particularly suited to adults concerned about:

• Dull or tired-looking skin.
• Early fine lines and wrinkles.
• Uneven-looking skin tone.
• Visible effects of sun and environmental exposure.
• Loss of brightness or radiance.
• Dryness combined with early signs of ageing.
• Sensitivity to stronger vitamin C concentrations.

Its 10% concentration makes it a strong entry point for people who want the recognised benefits of pure L-ascorbic acid without beginning with the highest-strength formulation.

How to Use Obagi Professional-C Serum 10%

1. Cleanse the face and allow the skin to dry.
2. Apply approximately five to seven drops to the face, neck and upper chest.
3. Gently press or smooth the serum into the skin.
4. Allow it to absorb before applying additional serums or moisturiser.
5. Use once daily, preferably as part of the morning routine.
6. Complete the routine with broad-spectrum sunscreen.

A brief tingling sensation can occur when introducing pure L-ascorbic acid. Introduce the serum gradually if your skin is particularly sensitive and adjust the frequency according to tolerance.

How to Build an Obagi Vitamin C Routine

Professional-C Serum 10% should normally be applied after cleansing and toning but before heavier creams and sunscreen.

For additional hydration, it can be followed with Obagi Daily Hydro-Drops Facial Serum. Dry skin may also benefit from applying Obagi Hydrate Facial Moisturiser before completing the morning routine with broad-spectrum SPF.

A simple morning order is:

1. Cleanser.
2. Toner, when used.
3. Obagi Professional-C Serum 10%.
4. Additional targeted serum, when required.
5. Moisturiser.
6. Broad-spectrum sunscreen.

Vitamin C and Daily Sun Protection

Vitamin C and sunscreen have complementary roles. Professional-C Serum supplies antioxidant support against environmental free radicals, while sunscreen helps reduce exposure to ultraviolet radiation.

Using both within the morning routine provides a more comprehensive approach to the visible effects of photo-ageing than relying on either step alone.

Texture, Colour and Storage

Pure vitamin C is naturally sensitive to heat, light and air. Correct storage helps preserve the condition of the formula after opening.

• Keep the bottle tightly closed when it is not being used.
• Store it in a cool, dark and dry location.
• Avoid leaving it in direct sunlight or excessive heat.
• Use the serum within the period stated on the supplied packaging.

Vitamin C serums can vary naturally from clear to light amber. A substantial change to a very dark brown colour, accompanied by a noticeable alteration in texture or scent, can indicate significant oxidation.

Frequently Asked Questions

What percentage of vitamin C is in Obagi Professional-C Serum 10%?

It contains 10% L-ascorbic acid, the pure and biologically active form of vitamin C used for antioxidant protection, visible brightening and support against signs of skin ageing.

Is Obagi Professional-C 10% suitable for sensitive skin?

It is the most accessible concentration in the Professional-C range and is specifically positioned for dry, sensitive or first-time vitamin C users. Individual tolerance can still vary, so particularly reactive skin may benefit from gradual introduction.

Is 10% vitamin C strong enough to be effective?

Yes. This is a concentrated pure L-ascorbic acid serum developed to provide meaningful antioxidant, brightening and visible age-defying benefits. The appropriate concentration depends on skin type and tolerance rather than simply choosing the largest percentage.

What is the difference between Professional-C 10%, 15% and 20%?

The principal difference is the L-ascorbic acid concentration and the skin profiles for which each formulation is designed:

• 10%: dry, sensitive or first-time vitamin C users.
• 15%: normal-to-combination skin and established vitamin C users.
• 20%: normal-to-oily skin and experienced users seeking the maximum concentration.

Should I use it in the morning or evening?

Professional-C Serum is particularly valuable in the morning because its antioxidant activity complements daytime sun protection. It may also be used according to a professionally designed evening routine.

Can Professional-C Serum be used every day?

Yes. The formula is developed for daily application. New users can introduce it gradually before progressing to consistent daily use.

Can I use it with retinol?

Vitamin C and retinol can be incorporated into the same overall skincare programme. A common approach is to use Professional-C Serum in the morning and retinol during the evening, allowing each active to occupy a clearly defined routine step.

Can it be used underneath makeup?

Yes. Its lightweight texture is designed to absorb rapidly, making it suitable beneath moisturiser, sunscreen and makeup.

How long does a 30ml bottle last?

Usage varies, but a 30ml bottle generally provides several months of daily application when the recommended five-to-seven-drop quantity is used.

Product Details

• Product: Obagi Professional-C® Serum 10%
• Size: 30ml
• Vitamin C: 10% L-ascorbic acid
• Format: Lightweight antioxidant serum
• Use: Once daily
• Best suited to: Dry, sensitive or vitamin C-naive skin
• Primary concerns: Dullness, uneven-looking tone, fine lines and environmental ageing

Important Information

For external use only. Avoid direct contact with the eyes, nose, mouth and lips. Discontinue use and seek appropriate advice if severe or persistent irritation occurs.

Ingredient declarations and packaging can be updated. Check the ingredient list printed on the product supplied before use, particularly if you have known allergies or sensitivities.