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Polydopamine is a safe, effective, and permanent hair dye that turns gray hair black in one hour.

The girl's regrown brown hair had less of certain pigments than her original black hair.

Squid ink melanin nanoparticles create a safe, long-lasting black hair dye that protects hair and offers UV protection.

East and Southeast Asians typically have less dense but thicker, straight black hair.

Cutting and implanting hair follicles can create finer, more natural-looking hairlines, with about half of the implanted hairs growing back.

Hair gets thinner and grayer with age, and density decreases more in men on top and in women on top and back.

Cooling the scalp may prevent hair loss from chemotherapy, hair often grows back after treatment, and nail issues usually improve after stopping the drug.

Some chemicals and drugs can cause hair loss, which usually grows back after stopping the treatment.

Early-stage male pattern baldness shows two types of hair loss: one on the top of the head linked to hormonal changes, and another at the back of the head. The top hair loss responds well to specific treatment, while the back hair loss does not.

Ginseng, especially red ginseng, may help regrow hair and block a hair loss-related enzyme.

Different methods, including stress management, healthy diet, supplements, and treatments like minoxidil, can help hair grow back after COVID-19 related hair loss.

Hot water and UV exposure reduce hair cortisol levels, with the back of the head showing the most consistent levels.

Some psychiatric medications can cause hair loss, but it usually grows back after adjusting the medication.

Cyclosporin extends hair growth in mice, but high-dose corticosteroids block this effect.

About 21.3% of young, healthy Chinese men experience hair loss. Hairlines are mostly linear or have a central protrusion. Hair is densest on the top and back of the head, and hair follicles usually have 1 or 2 hairs. This information can help in designing hair restoration procedures.

A teenager lost hair due to fluoxetine and sertraline, but it grew back after stopping these drugs and switching to a different one.

Most patients experience temporary hair loss after ECMO, but it usually grows back within 6 months without treatment.

Hair loss is mainly caused by a testosterone byproduct, and hair restoration surgery uses hair from the back and sides of the scalp.

Hormonal imbalances can cause skin and hair problems in women, and treatments that block male hormones can help.

Graphene-based hair dye is a safe, durable, and effective alternative to traditional black hair dyes.

Hair loss was the first sign of a brain-related complication in a woman with lupus, and early treatment helped her hair grow back.

Tofacitinib helped a woman with total-body hair loss grow her hair back.

The woman's hair loss was mainly due to stress and low iron levels, and her hair grew back after treatment.

Covering a wound can stop hair growth by promoting scarring, but boosting a process called Wnt signaling can help hair grow back even when the wound is covered.

A certain type of skin cell, marked by EGFR, produces a lot of IGF1 and helps hair follicles grow back faster.

A woman had a rare, non-cancerous skin growth on her face, which was removed and did not come back after a year.

Women with a certain type of hair loss have more copper in the back of their head than the front, and treatment can normalize hair but not copper levels.

Visual signs are crucial for accurately diagnosing and treating different types of hair loss in Black patients.

Minoxidil can increase hair density, speed up regrowth in transplanted hair, and slow down further hair loss, especially beneficial for women, young men with thinning hair, and those wanting to reconstruct the back of the scalp.

Combination therapy, including JAK inhibitors, effectively regrows hair and reduces severity in Black children with stubborn Alopecia Areata.