The product contains a unique patented formula of Hyper-Brightening C. It adopts advanced and innovative manufacturing technology to combine high concentration, high penetration and high stability of pure vitamin C (L-ascorbic acid).
Completely preserved in a fresh and stable state, the upgrade formula is updated to add vitamin E and melanin blocking complex II (Signal Lock Complex II), which doubles the effect of 'pure vitamin C' and every drop of essence is effective. Penetrates into the dermis to awaken healthy skin function.

Pure Vitamin C has an efficient antioxidant function, effectively inhibits and diminishes melanin, acne marks, and improves dull complexion; it can also promote collagen synthesis, achieve skin tightening and pore tightening effects.
In addition can promote blood circulation and inhibit sebum secretion, so that the skin achieves water-oil balance and more radiance, reducing the formation of blackheads and acne. 

Obagi Vitamin C Serum contains a  L-ascorbic acid, and is available in 3 strengths (5%, 10% and 20%) to suit different skin types.
-C5 is beauty serum with 5% Vitamin C for smoother skin.
-C10 is beauty serum with 10% Vitamin C for smoother and poreless skin. If you have acne scar discoloration, it might work for you.
-C20 is beauty serum with 20% Vitamin C for smoother, brighter and poreless skin. If you have acne scar discoloration, it might work for you.

How to Use:
- Use morning and evening.
- Apply a small amount of serum (3-4 drops) with fingertips to face.