HAIR CARE
30.0 25.0 20.0 15.0 10.0 5.00 0.0
Figure 6: Measurement of the horizontal displacement (d) of the hair swatch
were taken every five frames and digital pictures were generated after one and five treatment applications. Ten-second videos were recorded capturing
the movement of the swatches, at 30 frames/ second with a resolution of 1,920 x 1,080 pixels using a Nikon D7 100 digital camera. Videos were analysed using Scion Image for Windows software and the horizontal mean displacement (d) of the hair swatch (in pixels) was measured every five frames from 0 to 100. A typical measurement of the horizontal mean
displacement (d) of a hair swatch is illustrated in Figure 6. By using the quadratic deviation (DESVQ) where χ = value of displacement (pixels) in the frame every five frames from 0 to 100 frames and χ = mean value of the displacement, the deviations (horizontal mean displacements d) of the hair swatches were calculated:
The greater the value of displacement (pixels),
the bigger the hair swing against the air flow and thus the greater the hair movement or bounce. Figure 7 shows the percent change of the
horizontal mean displacements (DESVQ) after Amaranth peptides treatments on Caucasian virgin hair compared to placebo. The former increased the value of displacement (pixels), thus it increased hair bounce and movement by 18.1% after one application and by 26% after five applications, demonstrating a better performance compared to placebo treatment. Wind tunnel images showing hair bounce and
movement effect after Amaranth peptides and placebo treatments are illustrated in Figure 8. These demonstrate that Amaranth peptides visibly increased hair bounce and movement compared to placebo, providing fuller-looking hair with better manageability.
Conclusions NaturePep® Amaranth specific peptide composition provides multiple benefits on the hair fibre. Our study results demonstrate that it provides a significant increase in hair diameter, helps reinforce structural integrity of hair fibre creating thicker and fuller looking hair.
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26.0% 18.1%
1 application
5 application
Figure 7: Change in horizontal mean displacement after Amaranth peptide treatments (difference from placebo)
Study results also prove that this technology
increases hair bounce, movement and shine for a healthier looking hair appearance. It offers multi- faceted benefits to hair due to its unique peptide composition and represents a natural solution suitable for a variety of hair care treatments to address hair-thickening benefits.
behaviour of hair, in Chemical & Physical Behaviour of Human Hair (4th Ed.). 2012. 386-469
6 Stam et al. The swelling of human hair in water & water vapour. Textile Research Journal. 1952. 22;7, 448-465
PC
Acknowledgement: Hair shine and wind tunnel hair bounce and movement image analysis studies were conducted in collaboration with Kosmoscience Brazil.
References: 1 Trueb RM et al. A comment on the science of hair ageing. Int. J. Trichology. 2018. 10 (6): 245-254
2 Mamada A, Nakamura K. A study of the volume & bounce decrease in hair with ageing using bending elasticity measurements. J. Cos. Sci. 2007. 58, 485-494
3 Trueb RM. Global view on extrinsic & intrinsic factors affecting hair fibre quality of life. 10th World Congress of Hair Research. 2017.
4 Martinez-Lopez at al. Nutraceutical value of Kiwicha (Amaranthus Caudathus L.). Journal of Functional Foods. 2020. 65
5 Robbins CR. The physical & cosmetic PLACEBO
7 McMullen R, Jachowicz J. Optical properties of hair: effect of treatments on lustre as quantified by image analysis. Int. J. Cos. Sci. 2003. 54;4, 335-351
8 McMullen R, Jachowitcz J. Optical properties of hair: Detailed examination of specular reflection patterns in various hair types. J. Cos. Sci. 2004. 55, 29-47
9 Lefaudeux et al. New lustre formula for the characterisation of the hair tresses using polarisation imaging. Annual Hair Conference. 2008
10 Burstyn HC, Kamath YH. Diffraction of light by the cuticle diffraction of hair. J. Cos. Sci. 2007. 58, 295-308
11 McMullen R. Image analysis tools to quantify visual properties of hair fibre assemblies, in Evans T, Wickett RR (Eds.) Practical Modern Hair Science. 2012. 295-332
12. Galliano A et al. Analysing the movement of a hair swatch using video & imagine analysis: A promising technique for exploring the dynamic properties of hair. Int. J. Cos. Sci. 2015. 37, 56-62
NATUREPEP AMARANTH
Figure 8: Wind tunnel images showing hair bounce & movement after placebo & Amaranth peptide treatments
March 2022 PERSONAL CARE
Percentage (%) difference in horizontal displacement compared to placebo
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