ANTI-AGEING DAY 0 DAY 42 40


51


30


20


10


0 Placebo CutiGuard CL (3%)


with 3% Galdieria on the fact that skin colour was more homogeneous. This feature was a further subject of a placebo-controlled study. The effect of Galdieria on skin colour


Figure 3: Visible reduction of crow’s feet wrinkles after 14 days of treatment with 3% Galdieria The parameter of interest, in this case, is


evenness was assessed with the ColorFace® technology of Newtone Technologies. For the analysis of skin colour evenness, a cross- polarized filter (CP) was utilized. Skin colour evenness is defined as the degree of colour (L*, a* and b* values) dispersion within the region of skin that is of interest.


called H76. H76 represents the mean value of colour differences between each pixel in the region of interest, in other words: H76 equals the standard deviation of the quantified colours of all the pixels in the region of interest. When skin colour is even, H76 reaches zero. The more uneven the skin colouration, the higher is H76. Almost intuitively, many consumers use


makeup bases to make the ‘canvas’, which is their skin as homogeneous in colour as possible.


Figure 4: Increase of skin tone evenness in comparison to make-up benchmark for 3% Galdieria and placebo


As the results obtained measuring the above- described parameter H76 are scientifically relevant but hard to interpret, it is opportune to take H76, assess how a makeup base product influences H76, and then compare these results with the results that were obtained with Galdieria. This comparison was made based on a


publication by C. Batres et al. (“Cosmetics increase skin evenness: Evidence from perceptual and physical measures, Skin.” Res.


www.personalcaremagazine.com


June 2025 PERSONAL CARE


VOLUNTEER 2


VOLUNTEER 1


Increase in comparison to make-up benchmark (%)


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