Vitamin C is commonly used to treat aged skin. It has shown regenerative effects on skin wrinkles, texture, strength, and evenness of tone through its roles as an antioxidant, tyrosinase inhibitor, and inducer of collagen synthesis. Available vitamin C formulations on the anti-ageing skin care market vary by their pH, packaging, and vehicle, which may decrease absorption, and therefore, the efficacy of the product.
See a split faced study below on the benefits of topical vitamin C.
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J Drugs Dermatol. 2014 Oct;13(10):1208-13.
Split-face vitamin C consumer preference study.
Abstract
BACKGROUND:
Vitamin C is
commonly used to treat aged skin. It has shown regenerative effects on skin
wrinkles, texture, strength, and evenness of tone through its roles as an
antioxidant, tyrosinase inhibitor, and inducer of collagen synthesis.
Available vitamin C formulations on the anti-aging skin care market vary by
their pH, packaging, and vehicle, which may decrease absorption, and
therefore, the efficacy of the product.
OBJECTIVE:
The purpose of
this study was to assess the subjective efficacy, wearability, tolerance and
overall preference of two professional vitamin C topical serums and
sunscreens in Caucasian females using a split face method.
METHODS:
A virtual split-face
study of 39 Caucasian women compared two popular vitamin C and SPF product
combinations - C-ESTA® Face Serum and Marini Physical Protectant SPF 45 (Jan
Marini Skin, San Jose, CA; Products A) and CE Ferulic® and Physical Fusion UV
Defense SPF 50 (Products B; SkinCeuticals Inc, Garland, TX). The products
were assigned to each subject's left or right side of the face, and subjects
rated and compared products through 5 online surveys at baseline, 24 hours,
days 3, 7, and 14.
RESULTS:
Over 86% of the 35
subjects who completed the study preferred the smell and 83% preferred the
feel and application of vitamin C Serum A over Serum B. Seventy-one percent
of subjects preferred the feel and application of Sunscreen A over Sunscreen
B. Results also showed a significant skin texture improvement and skin tone
with Products A vs Product B. Products A trended higher for multiple
additional categories.
CONCLUSIONS:
Products A
exhibited superior anti-aging benefits than Products B. Subjects preferred
the smell, feel, and application of Products A and experienced significantly
less irritation than Products B. Overall, Products A were preferred over
Products B with subjects willing to pay more for Products A over Products B.
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PMID: 25607555 [PubMed - indexed for MEDLINE]
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