Performing a standardized 60-second hair count appears to be a reliable method for the assessment of hair shedding, according to a new report.

Researchers at the University of Pennsylvania School of Medicine have found that hair follicles in adult mice regenerate by re-awakening genes once active only in developing embryos. These findings provide unequivocal evidence for the first time that, like other animals such as newts and salamanders, mammals have the power to regenerate. A better understanding of this process could lead to novel treatments for hair loss, other skin and hair disorders, and wounds.

Using an animal model, a research team led by Yann Barrandon at the EPFL (Ecole Polytechnique Federale de Lausanne) and the CHUV (Lausanne University Hospital) has discovered that certain cells inside the hair follicle are true multipotent stem cells, capable of developing into the many different cell types needed for hair growth and follicle replacement. In an article appearing in the Oct 3 advance online edition of the Proceedings of the National Academy of Sciences, they demonstrate that these holoclones can be used for long-term follicle renewal.

Hair follicle stem cells are important contributors to the wound-healing process, according to new research by investigators at the University of Pennsylvania School of Medicine. Using an animal model, the researchers discovered that stem cells in the hair follicle are enlisted to help heal wounds in the skin. This finding, published online in Nature Medicine last week, may suggest a therapeutic target for the development of drugs to encourage and promote wound healing.

Disease that cause hair loss is a common problem among many, but is often only due to genetics and a change in the balance of one's body. Side affect from other disease that you are having or a result from a surgery also causes hair loss. Hair loss can occur also due to diet. If you are dealing with a disease or surgery it is vital to know how this will affect your hair. To recover your hair, then you will be able to take the proper steps.

Hair loss may develop gradually or suddenly. It results from hereditary factors, aging, local skin conditions, and diseases that affect the body generally (systemic diseases). Many different drugs can also cause hair loss. When it occurs on the head, hair loss is generally referred to as baldness. Androgenetic alopecia is the most common type of hair loss, eventually affecting about half of all men (male-pattern baldness) and 10 to 20% of women (female-pattern baldness). A slightly elevated level of the male hormone dihydrotestosterone probably plays a major role, along with genetic factors. The hair loss can begin at any age, even during the teenage years.

Both extreme emotional and physical stress can cause hair loss. The most common cause of sudden unexpected hair loss is a condition called telogen effluvium. Telogen effluvium can develop as a consequence of severe mental stress, which can be caused by a divorce, the death of a loved one, major financial problems, or other traumatic emotional events. Physical stressors such as a major illness or surgery, high fever, and severe infection also can trigger stress-related hair loss.

female-pattern baldness Although less common, female-pattern baldness differs from that of male-pattern baldness in that the hair generally thins all over the head, but the frontal hairline is maintained. Female-pattern baldness rarely results in total hair loss.

Hair loss usually develops gradually and may be patchy or diffuse (all over). Roughly 100 hairs are lost from your head every day. The average scalp contains about 100,000 hairs. Each individual hair survives for an average of 4-1/2 years, during which time it grows about half an inch a month. Usually in its 5th year, the hair falls out and is replaced within 6 months by a new one. Genetic baldness is caused by the body's failure to produce new hairs and not by excessive hair loss.

Alopecia areata is a disease that affects the hair follicles, which are part of the skin from which hairs grow. In most cases, hair falls out in small, round patches about the size of a quarter. Many people with the disease get only a few bare patches. Some people may lose more hair. Rarely, the disease causes total loss of hair on the head or complete loss of hair on the head, face, and body.

Want to know how much hair you're losing? Start counting -- the hairs on your comb, not on your head. In the June issue of Archives of Dermatology, scientists demonstrate that a so-called "60-second hair count" is a simple and reliable away to get a grip on whether you're balding and, if so, how fast. The procedure, which can be carried out in the convenience of your own home, may reassure the adult male -- or not.

The case of a child with permanent alopecia due to birth-related caput succedaneum is presented. After delivery with vacuum extraction, caput succedaneum at the left occipitoparietal region of the neonate's head was noted, which subsided within a week, leaving a circular necrotic crust and finally a circular bald area. At age 4, the child was referred at a tertiary center for the management of alopecia. Treatment initially consisted of the expansion of the hair-bearing skin adjacent to the bald area, which was excised at a second stage and covered with the expanded skin. A pleasing esthetic result was achieved.

It may be possible to grow new hair follicles, according to scientists studying mice. The scientists—who included George Cotsarelis, MD, associate professor of dermatology at the University of Pennsylvania—report their findings in Nature. They noticed that in lab tests, adult mice grew new hair follicles in skin healing from wounds.

“Why me?” can be a question that men may ask themselves when they first notice that they have male pattern hair loss--a condition that affects two out of three men. Despite the fact that male pattern baldness is very common, many men who are faced with hair loss feel embarrassment and have low self-esteem. According to Phillip Ginsberg, D.O., J.D., an osteopathic physician who practices in Philadelphia, Pa. when a male is experiencing hair loss it is important to know what is causing the hair loss and become educated about the available treatment options.

On average, there are 100,000 to 150,000 hairs on the human scalp. The hairs grow from hair roots, or follicles (saclike structures under the skin). Blood vessels at the base of each follicle provide the nourishment necessary for hair growth. Hair growth in each root occurs in a cycle independent of the other roots. At any time about 90 percent of the hairs on the scalp are in the growth phase, while the other 10 percent are in the resting phase. The growth phase lasts an average of four to five years, after which the follicle enters the resting phase, which lasts about two months to four months. At the end of the resting phase, the hair falls out naturally and is replaced by a new hair. Consequently, some hair loss is a normal part of the hair growth cycle. In fact, on a typical day, about 50 to 150 scalp hairs are lost. Baldness (or alopecia) results when hair loss occurs at an abnormally high rate; when hair replacement occurs at an abnormally slow rate; or when normal hairs are replaced by thinner, shorter ones.

Yes possibly. Some women on the keratin.com web forum have reported initially developing telogen effluvium as diagnosed by their dermatologists. This was observed after chronic stress and/or child birth. In some cases, telogen effluvium can be a trigger for the onset of androgenetic alopecia. Some women have reported that diffuse hair loss due to telogen effluvium, developing over a time span of six months to a year, later became a permanent androgenetic alopecia type hair loss. These are anecdotal observations by just a few individuals, but they claim these diagnoses were made by their dermatologists.

A team of scientists, including a research at Cincinnati Children's Hospital Medical Center, has discovered that a little-known molecule created in the intestine when soy is digested is a natural and powerful blocker of a potent male hormone involved in prostate cancer and male pattern baldness. In fact, the molecule, equol, completely stops in its tracks the male hormone dihydrotestosterone (DHT), which normally stimulates prostate growth and causes male pattern baldness.

Until now, Female Hair Loss has been difficult to predict and diagnose. That changes with today's announcement that HairDX, LLC (www.hairdx.com), pioneers of consumer-friendly genetic tests for hair loss, has introduced a screening test using genetic markers strongly associated with Female Hair Loss (Female Androgenetic Alopecia). The easy to understand test provides an accurate and understandable genetic analysis of a woman's likelihood of developing this common type of hair loss.

Baldness can be classified into various types, depending on the cause. Several of the many different types of baldness include the following: female-pattern baldness although less common, female-pattern baldness differs from that of male-pattern baldness in that the hair generally thins all over the head, but the frontal hairline is maintained. Female-pattern baldness rarely results in total hair loss.

Causes, incidence, and risk factors: Hair grows from its follicle at an average rate of a 1/2 inch per month. Each hair grows for 2 to 6 years, then rests, and then falls out. A new hair soon begins growing in its place. At any one time, about 85% of the hair is growing and 15% is resting. Baldness occurs when hair falls out but new hair does not grow in its place. The cause of the failure to grow new hair in female pattern baldness is not well understood, but it is associated with genetic predisposition, aging, and levels of endocrine hormones (particulary androgens, the male sex hormones).

The greater the hair loss on the top of a man's head, the higher his risk of having heart problems, according to researchers who say they've confirmed previous studies linking baldness with heart disease. The new report, published Monday, says men who are losing hair on the crown of their heads have up to a 36 percent greater risk of heart problems, including heart attacks and bypass surgery. Men with a receding hairline are not at increased risk, but those going bald at the crown should pay special attention to their blood pressure and cholesterol levels and lead a healthy lifestyle, researchers said.

Alopecia areata is considered an autoimmune disease, in which the immune system, which is designed to protect the body from foreign invaders such as viruses and bacteria, mistakenly attacks the hair follicles, the tiny cup-shaped structures from which hairs grow. This can lead to hair loss on the scalp and elsewhere. In most cases, hair falls out in small, round patches about the size of a quarter. In many cases, the disease does not extend beyond a few bare patches. In some people, hair loss is more extensive. Although uncommon, the disease can progress to cause total loss of hair on the head (referred to as alopecia areata totalis) or complete loss of hair on the head, face, and body (alopecia areata universalis).

Research into young people’s experiences of hair loss during cancer treatment has found it is a mistake to assume women will be more affected than men. Scientists analysing interviews with recovered young adult cancer patients enrolled in the DIPEx project found that young men were just as affected by chemotherapy-induced hair loss as young women. However until now, men’s experiences of hair loss have been largely ignored.

The association of androgenic alopecia (AGA) with insulin resistance, coronary artery disease and hypercholesterolemia has been previously reported in men, but no such association has been reported in women with female androgenic alopecia (AGA). Female AGA has usually been linked with hyper-androgenism and hirsutism and, most recently, also with polycystic ovarian syndrome (PCOS), even though epidemiological documentation of the latter association is scanty. Polycystic ovarian syndrome is quite common among Caucasian women, and its association with insulin resistance is well documented.

Alopecia, the excessive or abnormal loss of hair, can occur in both men and women. Many men experience androgenetic alopecia (AGA), known to the general public as male pattern hair loss or baldness. Women can develop a similar condition, known as hereditary thinning or female pattern hair loss (FPHL). Since the influence of androgens may be only one of several paths leading to patterned hair loss in women, FPHL may be a more accurately descriptive term until other mechanisms involved in normal aging and hair cycle disruption are clarified.

Folliculitis decalvans, also known as alopecia folliculitis or acne decalvans, is an inflammatory reaction in hair follicles on the scalp that causes redness (erythema) and pus-filled blisters (pustules). It leads to scarring and permanent hair loss. Traction alopecia occurs as a result of improper hair care and prolonged use of certain hair-styling techniques. Cosmetic treatments (e.g., dyes, tints, bleaches, permanents) are generally safe; however, if treatments are done incorrectly, or if the chemicals are used for too long, the hair becomes brittle and breaks easily. Hairstyles that pull the hair tightly, and excessive shampooing or brushing can also cause hair loss. Braiding, permanents, excessive heat, and hair straightening cause hair shaft weakness. Hair styling techniques such as hair weaving, corn rowing, and the use of hot combs to straighten hair can cause permanent hair thinning and scarring.

Some fashion models with beautifully shaped heads may choose baldness as part of their look. But for most women, loss of hair -- or even thinning of it -- is highly upsetting, often much more so than for men. The relatively extensive hair loss that often occurs after pregnancy frightens many a new mother. And women commonly describe hair loss as the most devastating aspect of chemotherapy, even though they know their hair will grow back after the treatments are over.