By Jennifer Mary Marsh, John Gray, Antonella Tosti

Hair healthiness is a middle good thing about items produced for shoppers by means of the beauty undefined, and greater than 70% of ladies declare to need fit hair. despite the fact that, there's little or no readability within the as to the which means of fit hair in a shopper context and the technical elements that keep an eye on what the shopper perceives as hair wellbeing and fitness.

Providing up to date info on the best way to hinder and fix hair harm, Healthy Hair characterizes the scientific, actual, and chemical houses of fit hair. elements that keep watch over a woman’s notion of fit hair are defined, and the way those elements hyperlink to the elemental biology of the hair fiber are defined, in addition to insults to hair, reminiscent of brushing, coloring, and UV publicity. The impacts of other items on hair well-being are mentioned, and techniques used to degree fit hair on the molecular, single-fiber, and client degrees are defined. countless numbers of top quality colour photographs illustrate an important medical, dermoscopic, and microscopic features of either fit and dangerous hair.

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Over-porous hair is dry, and tends to develop split ends. The damaged cuticle is fragile, and the damage worsens with time and repeated processing. The greater the damage, the more the cortex swells with water whenever the hair is washed and the more water it loses when it dries. A simple test of the porosity of the hair is demonstrated by placing a drop of water on a hair tress which is undamaged and one which has been repeatedly processed. On the undamaged hair the water droplet retains its shape due to the intact cuticle.

The degree of damage inflicted on hair raises that challenge to greater heights (Figs. 39). In the next chapter we explore the reality of healthy hair. 27 Fig. 37 Almost complete fracture of the hair shaft under the electron micrograph Fig. 38 Images illustrating hair shape, color, and size variations on single heads 28 1 Healthy Hair: Form and Function Fig. 39 (a–c) SEM images of root, mid and tips of women with 30 cm length hair illustrating change in hair structure Reference 1. Birch PM, Messenger A.

27 Fig. 37 Almost complete fracture of the hair shaft under the electron micrograph Fig. 38 Images illustrating hair shape, color, and size variations on single heads 28 1 Healthy Hair: Form and Function Fig. 39 (a–c) SEM images of root, mid and tips of women with 30 cm length hair illustrating change in hair structure Reference 1. Birch PM, Messenger A. Bad hair days – scalp sebum excretion and the menstrual cycle. J Cosmet Dermatol. 2004, 2 (3–40), 190–194. Further Reading Blume-Peytavi U, Tosti A, Whiting D, Trueb R.

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