Obagi Professional-C Serum 20% contains a high concentration of vitamin C, specifically 20%, which is known for its antioxidant properties and its ability to brighten the skin and improve its overall appearance.

The serum is formulated to help protect the skin against free radicals, which can contribute to premature aging and damage. It aids in promoting collagen production, reducing the appearance of fine lines and wrinkles, and enhancing skin radiance.

To use the Obagi Professional-C Serum 20%, cleanse and tone your skin as usual. Apply a few drops of the serum to your fingertips and gently massage it onto your face, neck, and décolletage. Allow it to absorb fully before applying any additional skincare products or makeup. It's typically recommended to use the serum in the morning as part of your daily skincare routine.