Obagi Professional-C 20% Vitamin C Serum
VersusSkinCeuticals Double Defence
Obagi Professional-C 20% Vitamin C Serum
Best For
Normal to oily skin types
Best For
Normal, Combination, Discolouration-prone skin types.
Ingredient Profiles
Obagi Professional-C 20% Vitamin C Serum
Obagi Professional-C 20% Vitamin C Serum is a fast-absorbing serum designed to brighten and even skin tone while reducing the appearance of dark spots. Formulated with L-Ascorbic Acid, the purest form of Vitamin C, this serum helps to neutralize free radicals and combat oxidative stress. Ideal for normal to oily skin types.
Evidence-Based Efficacy
Research indicates that antioxidants like Vitamin C can effectively combat oxidative stress, which is linked to skin aging. For more information, see the studies: The Role of Oxidative Stress in Skin Disorders Associated with Alcohol Dependency and Antioxidant Therapies and Topical anti-inflammatory treatments for eczema: network meta-analysis.
SkinCeuticals Double Defence
SkinCeuticals Double Defence
The SkinCeuticals Double Defence set combines the powerful Phloretin CF serum with the Advanced Brightening UV Defense SPF 50 sunscreen. This duo is designed to target discolouration, improve skin tone, and provide robust protection against environmental damage.
Phloretin CF is a patented triple antioxidant serum that features a synergistic blend of 2% phloretin, 10% pure vitamin C (L-Ascorbic Acid), and 0.5% ferulic acid. Together, these ingredients help to reduce the appearance of fine lines and uneven skin tone while protecting against free radicals and UV damage.
Advanced Brightening UV Defense SPF 50 is a lightweight sunscreen that not only shields the skin from harmful UV rays but also contains 1% tranexamic acid and 2% niacinamide to enhance skin clarity and brightness. This dual-action formula is clinically proven to improve skin tone and reduce discolouration.
Evidence-Based Efficacy
The efficacy of Phloretin CF and its components has been supported by clinical studies, including findings available on Europe PMC.
Safety & Application
Directions
Step 1: Apply 5-7 drops in the morning after cleansing and toning, before moisturizer. Step 2: Follow-up with SPF before makeup application. L-ascorbic acid (pure vitamin C) is known to change color with time, however oxidation is minimal in Obagi antioxidants and the formulation is proven to remain effective.
Safety Notice
For external use only. Avoid direct contact with eyes, nose, mouth, and lips. Some users may experience slight tingling, which should diminish with continued use. If tingling becomes severe, stop use and consult a doctor.
Directions
In the morning, after cleansing, apply 4-5 drops of [Phloretin](/ingredients/phloretin) CF to face, neck, and chest. Apply Advanced Brightening UV Defense SPF 50 just before sun exposure. Re-apply frequently and generously to maintain protection, especially after swimming, perspiring, or towelling. Avoid sun exposure at peak times and take care to avoid the eye area.
Safety Notice
In case of contact with eyes, rinse immediately and thoroughly.
