Discover Obagi’s bestselling Professional C® Serum 20%. Our highest concentrated Vitamin C serum helps minimize the appearance of fine lines and wrinkles. Daily Use of Vitamin C Proactively fortifies the skin defenses against environmental assaults. Encourages skin to rebound from previous, visible damage for an improved appearance of fine lines, wrinkles, and uneven skin tone. Strengthens skin defense with a powerful antioxidant that helps skin appear younger for longer. 
Highest concentrated serum with 20% L-ascorbic acid (Vitamin C), best suited for normal to oily skin. Helps minimize the appearance of fine lines and wrinkles.
 
HOW TO USE 
•STEP 1: APPLY 5-7 DROPS IN THE MORNING AFTER CLEANSING AND TONING, BEFORE MOISTURIZER.
•STEP 2: FOLLOW-UP WITH SPF BEFORE MAKEUP APPLICATION.
INGREDIENTS
 L-ASCORBIC ACID 20%
Known as the purest form of Vitamin C, L-ascorbic Acid helps neutralize free radicals, minimize the look of fine lines and wrinkles, and brighten skin tone.
FULL INGREDIENTS
Propylene glycol, aqua/water/eau, L-ascorbic acid, alcohol, ascorbyl glucoside, ethoxydiglycol, phenoxyethanol, sorbitol, sodium hyaluronate, zinc chloride, calcium hydroxide, fragrance (parfum).
SAFETY INFORMATION 
For external use only.
Avoid direct contact with eyes, nose, mouth and lips.
Some users of this product may experience a slight tingling, which should diminish with continued use.
If tingling becomes severe, stop use and consult a doctor