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A 31-year-old man's hair turned white suddenly, likely due to alopecia areata.

Apoptosis helps shape hair growth and prepares the skin for hair to emerge.

The study found that a specific area of the hair follicle helps start hair growth by reducing the blocking effects on certain cells and controlling growth signals.

Aging significantly affects the hair and scalp of nonbalding Caucasian women, with changes that differ from male pattern baldness.

Two specific hair keratin genes are active during hair growth and decline as hair transitions to rest.

Loose Anagen Syndrome is a hair condition where hairs can be easily pulled out, mainly affecting young girls, and may improve on its own or with treatment.

Vitamin D deficiency is common in temporary hair loss, and stress is often a suspected cause.

Healthy hair and scalp depend on overall body health.

Human hair follicles can grow back.

The review concludes that accurate diagnosis of different types of hair loss requires proper biopsy techniques and understanding the hair growth cycle and underlying causes.

Fine hairs improve male pattern baldness treatment, alopecia areata causes remain unknown, and hair can recover from dye damage over time.

The study found average numbers for different types of hair follicles in the scalp and observed differences between men and women, suggesting reasons for more common hair shedding in women.

Trichoscopy helped diagnose a teenage girl's hair loss as monilethrix.

Wnt ligands, produced by dermal papilla cells, are essential for adult hair growth and regeneration.

The hair treatment made hair grow faster and thicker and strengthened the hair roots.

Estetrol may help prevent hair loss and promote hair growth in women.

Mimicking growth factors in a topical solution can prolong hair growth phase and reduce hair loss without side effects.

Applying certain inhibitors to the skin can promote hair growth without harming cells.

The document concludes that different patterns of hair thickness and scalp changes can help diagnose types of non-scarring hair loss.

A 23-year-old man has a benign, non-progressive hair loss patch that doesn't respond to treatment but can be cosmetically treated.

Androgenetic alopecia causes hair thinning due to increased androgen activity, treatable with minoxidil and finasteride.

Hair transplantation is a surgical procedure to move hair to bald areas, requires good donor hair, and results show in about a year.

Stress, hypothyroidism, drug intake, and anemia are important factors in women's diffuse hair loss.

Early and late matrix progenitors in hair follicles create different cell layers, with early ones forming the companion layer and later ones forming the inner root sheath and hair shaft.

Mice lacking a key DNA methylation enzyme in skin cells have a lower chance of activating stem cells necessary for hair growth, leading to progressive hair loss.

Thyroid hormones help hair grow, reduce hair loss, and increase hair pigment.

A woman had temporary hair loss due to stress from a spinal cord injury.