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Many variables affect hair thickness and its other properties in aging women.

Women's Health Weekly

| April 01, 2004 | COPYRIGHT 2004 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2004 APR 1 - (NewsRx.com & NewsRx.net) -- Many variables affect hair thickness and its other properties in aging women.

"The biological importance and/or significance of human hair color is unknown even though greying is obviously associated with aging. In order to further characterize hair pigmentation in relation with hair growth variables we evaluated 3 scalp sites (top of the head (T): left and right and occipital(O)) in 12 untreated menopausal women (age range: 49-66 years: average 59.63[+ or -]5.66) who presented complaining of hair loss and/or diffuse alopecia," investigators in Belgium report.

"Controls were 12 non menopausal sexually mature woman (7 age range 15 - 21 and 5 age range 38 - 48) not complaining of hair loss. One hair sample (whenever possible n=60) was taken one month after clipping from T and O on each person; menopausal women were sampled twice," stated D. Vanneste and colleagues, Skinterface.

"The following measures were performed with a light microscope: diameter (average min - max., micrometer), medulla (0%=absent to 100%=fully developed) and linear hair growth rate (mm/day). The hairs were categorized as pigmented (P) or non pigmented (white, W) as compared with a black and white reference card. A total of 3343 hairs were analyzed with 2-factor analysis of variance (ANOVA)."

"A global comparison (all hairs) showed that the average diameter of W hair (67.68 micrometer) exceeded that of P hair (57.41 micrometer) (p=0.0001) and this was maintained on all 3 scalp sites. In addition, the medulla of W hair (23.91%) appeared more developed than the medulla of P hair (12.21%) (p=0.0001) and was more expressed in W T hairs as compared with W O hairs (p=0.0325). There was also a significant interaction between site and pigmentation (p=0.0074). Growth rate of W hairs (0.38 mm/d) was higher than that of P hairs (0.35 mm/d) ...

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Source: HighBeam Research, Many variables affect hair thickness and its other properties in...

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