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Pigs without the Hairless gene showed skin and thymus changes, useful for studying human hair disorders.

Nevus comedonicus can sometimes grow terminal hair, challenging previous beliefs.

Gray hair may be caused by lower antioxidant activity in hair cells.

Early hair graying is often inherited and influenced by genetics, environment, and lifestyle, but treatment options are limited.

Low fluence photoepilation temporarily removes hair by targeting the hair follicle's pigmented area without severe damage.

Latanoprost therapy potentially caused a woman's white hair to darken again.

Laser treatment can inhibit hair growth and different hair colors reach different temperatures when lasered.

New laser technologies and methods are safer and more effective for hair removal on darker skin tones.

A 17-year-old developed woolly hair nevus in adolescence, which is unusual, and over time the hair darkened and straightened slightly, but microscopic changes persisted.

Non-hairy skin cells might be used to regenerate hair, helping with baldness and skin wounds.

Iron can be present in hair color changes without overall iron deficiency.

Certain flavonoids help grow back colored hair after skin injury.

Hair transplantation showed the most promise for repigmenting white hair, especially for eyebrows and eyelashes.

Porcine and human pilosebaceous units are very similar.

White hair in alopecia areata may be linked to reduced Sox10 expression.

Intralesional corticosteroids effectively treat localized alopecia areata, often sparing white hairs.

Some hair care products may improve hair growth and appearance, and botanicals can also help remove unwanted hair.

A rare, harmless hair condition was found in an infant's eyebrow, needing no treatment.

Human black hair is best for distinguishing between T. mentagrophytes and T. verrucosum.

Mammal hairs have different internal structures.

A 9-year-old girl has a rare hair disorder causing beaded, sparse hair.

Premature hair graying is caused by various factors and mechanisms.

Trichostasis spinulosa mainly affects the nose, with many tiny hairs in one follicle, possibly influenced by hormones and sunlight.

The boy with woolly hair nevus had thinner hair and abnormal hair follicles, which improved with treatment but worsened when treatment stopped.

Fat tissue around hair follicles releases a growth factor that helps hair grow and develop color.

Premature graying of hair is common and stressful, but not well understood or treated.

Hair grays due to oxidative stress and fewer functioning melanocytes.

Hair dye colors mainly target melanin granules in black hair.

Laser hair removal works well for light skin with dark hair but needs caution for darker skin.