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The enzyme that changes testosterone to a stronger form is mostly found in the part of the hair follicle called the dermal papilla.

Accurate clinical, histological, and genetic methods are key for understanding and treating hair disorders.

Two patients with porphyria cutanea tarda experienced their grey hair turning dark again.

Hormones, nutrition, and seasonal changes regulate hair growth cycles, with androgens extending growth phases and factors like aging and malnutrition affecting hair loss and thinning.

Spiny mice are better at regenerating hair after injury than laboratory mice and could help us understand how to improve human skin repair.

Healthy women tend to lose more hair in July and April, and the least in February.

Hair extensions can cause hair loss and scalp damage, and these problems might be more common than people realize.

Chemotherapy can cause hair changes similar to alopecia areata, which might lead to misdiagnosis.

Testosterone can slow down hair growth when combined with certain cells from bald scalps, and this effect can be blocked by an androgen receptor blocker.

Radiation mainly affects keratinocyte stem cells, not melanocyte stem cells, causing hair to gray.

Most hair loss in children is caused by a few common conditions, and it's important to diagnose these properly and support the child's mental health.

Certain scalp patterns can indicate the severity and activity of hair loss in Turkish alopecia patients.

Woman has discoid lupus, frontal fibrosing, and androgenetic alopecia.

Eyebrow transplantation can be successful for Asians with the right technique and care, but regular maintenance is necessary.

Chemotherapy causes hair loss starting soon after treatment begins and recovers about 3 months after ending, while tamoxifen does not significantly affect hair growth.

The protein ARA70/ELE1 is involved in male pattern baldness, and lower levels of its short form may lead to hair thinning.

Antler velvet hair and body hair of red deer have different structures that help with protection and insulation.

The conclusion is that accurate diagnosis of different types of hair loss requires careful examination of tissue samples and understanding of clinical symptoms.

The cause of alopecia areata is likely a mix of genetics, immune system issues, and environmental factors, with more research needed to understand it fully.

Hair casts on the scalp may be a sign of ongoing pemphigus vulgaris and could suggest a need to adjust treatment.

A cancer drug caused unusual hair growth on a 100-year-old man's scalp and eyelashes.

Glypican-1 is important for blood vessel growth in hair follicles and could help treat hair loss.

The article explains how to identify and treat excessive hair growth in women, which can be distressing and may signal other health problems.

Two teenage brothers had a rare, treatment-resistant form of female-pattern hair loss with unusual scalp changes.

A specific type of skin cell creates an opening for hair to grow out, and problems with this process can lead to skin conditions.

The "Punch Assay" can regenerate hair follicles efficiently in mice and has potential for human hair regeneration.

Adding licorice gel to laser treatment is more effective for reducing facial hair than laser alone.

Impaired autophagy may cause hair loss by triggering early catagen.

Exposure to 50 Hz electromagnetic fields may help mice grow hair faster.

The HIF-2α/ARNT complex is important for hair follicle development by controlling cell growth.