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Caucasian facial L* shifts may communicate anti‐ageing efficacy
Author(s) -
Zedayko T.,
Azriel M.,
Kollias N.
Publication year - 2011
Publication title -
international journal of cosmetic science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 62
eISSN - 1468-2494
pISSN - 0142-5463
DOI - 10.1111/j.1468-2494.2011.00653.x
Subject(s) - ageing , age groups , brightness , psychology , medicine , audiology , demography , physics , optics , sociology
Synopsis An ageing study was conducted to capture skin colour parameters in the CIELab system from Caucasians of both genders and all available adult ages. This study produced a linear correlation between L* and age for a Caucasian population between 20 and 59 years of age as follows: (L* value) = −0.13 × (Age in years) + 63.01. Previous studies have addressed age‐related changes in skin colour. This work presents a novel consumer correlated quantitative linear model of skin brightness by which to communicate age‐related changes. Two product assessment studies are also presented here, demonstrating the ability of anti‐ageing products to deliver on objective and subjective improvements in skin brightness. It was determined to be possible to use the fundamental Caucasian L*‐age correlation to describe product benefits in a novel quantitative and consumer‐relevant fashion, through the depiction of a ‘years back’ calculation.