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All you want to know about body hair

What to know about body hair

body hair

Information You Need To Know About Body Hair

Scientists found that hairless skin secretes a protein that blocks a signaling pathway (WNT) that controls body hair growth.

Here Are Some Information About Body Hair

1. Each hair on your head has a continuous cyclic pattern of growth and rest called a ‘hair growth cycle’.

2. Human hair generally grows at a rate of about 1.27 cm each month.

3. Aging causes permanent hair thinning or hair loss in both men and women as the body gradually becomes unable to replace shed hairs.

4. Hair has a lifespan of between two and six years. Whenever you shed a hair, a new one starts growing to replace it.

5. Hair growth is usually less visible on curly hair.

6. In people with alopecia androgenetica (male or female pattern baldness), the hair growth cycle starts to weaken. 

body hair

As hair follicles shrink, shorter, finer hair strands are produced. Once the growth cycle eventually stops, no new hair grows in its place.

7. Alopecia androgenetica is a complex inherited condition that can go back six generations or even skip them, only to affect an individual that is the only one in his/her family to inherit this type of hair loss

8. The anticipation of sex makes hair grow faster. 

9. Each strand of hair can support up to 100 grams in weight. Multiply that by the average 100,000 to 150,000 strands on each head, and your entire head of hair could support the weight equivalent to two elephants. 

10. In 2002, researchers reported that people with ginger hair require 20 per cent more an aesthetic before surgery than blondes or brunettes.

Have you ever wondered why hair grows on some parts of your body, but not others?

body hair

New research offers a possible explanation. Scientists found that hairless skin secretes a protein that blocks a signaling pathway (WNT) that controls hair growthCalled Dickkopf 2 (DKK2), the protein is found in specific embryonic and adult tissues and has a variety of functions, the University of Pennsylvania researchers explained.

They found that plantar skin from mice – similar to the underside of the human wrist – had high levels of DKK2. When they genetically removed DKK2 from the mice, hair began to grow in this normally hairless skin region.

Hair formation

"This is significant because it tells us WNT is still present in hairless regions, it's just being blocked," said study co-senior author Sarah Millar, director of the Penn Skin Biology and Diseases Resource-Based Center. "We know that WNT signalling is critical for the development of hair follicles; blocking it causes hairless skin, and switching it on causes formation of more hair," Millar said in a Penn news release.

"In this study, we've shown the skin in hairless regions naturally produces an inhibitor that stops WNT from doing its job," she added.

Hair follicles develop before birth. This means that hair follicles don't regrow after severe burns or deep wounds. The researchers are currently investigating whether secreted WNT inhibitors suppress hair follicle development in such cases.

More than 80 million people in the United States have male- or female-pattern baldness, according to the American Academy of Dermatology. Previous research suggests that DKK2 may be associated with this condition, meaning it could be a potential target for treatment.

"We hope that these lines of investigation will reveal new ways to improve wound healing and hair growth, and we plan to continue to pursue these goals moving forward," Millar said. The study was published in the journal Cell Reports.