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The combination of a plant extract and a peptide can increase hair pigmentation and may reverse greying.

Stress causes hair graying by overactivating nerves that deplete color-giving stem cells.

The boy's hair and skin color differences are due to a pigmentation disorder.

A boy with progeria had eye problems and signs of aging like hair loss and skin wrinkling.

Gray hair has more continuous medullation and a higher medullary diameter than black hair.

Hair ages due to genetics and environmental factors, leading to graying and thinning, with treatments available for some conditions.

Men's hair loss is caused by hormones and genes, and can be treated with medication and surgery, while graying is due to aging and has no prevention except dyeing.

Three Iranian men had reddish-brown facial pigmentation with no effective treatment.

Hair greying is linked to reduced ATM protein in hair cells, which protects against stress and damage.

Graying hair is caused by changes in gene expression affecting cell functions.

Pueraria thunbergiana extract may help prevent hair from turning gray.

Using radiation to make mice's hair turn gray helps study and find ways to prevent or reverse hair graying.

The herbal mixture Xiantene may help treat common baldness, and men who grey early tend to be less bald but more grey.

The study found that long-term sun exposure does not significantly affect follicular plugs on the scalp, and the scalp's appearance is unique compared to other body parts.

A 73-year-old man's grey-white hair turned dark brown after eczema treatment.

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.

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

Black hairs have more pigment-related genes, while gray hairs have more keratin-related genes.

Stress can cause sudden hair whitening in children, but it may reverse on its own.

Stress can cause sudden hair whitening in children, but it may reverse on its own.

Exosome therapy can safely and effectively restore color to gray hair.

The research found that a specific skin cell type not only triggers hair growth but also controls hair color, and that aging can lead to hair loss and color changes.

A certain signaling pathway in mice, when increased, causes hair to gray by depleting the cells that give hair its color.

Greying hairs may be protected from alopecia areata.

Removing hair from mice without reproductive glands led to grey hair, possibly helping to understand greying in aging.

PT-20 did not significantly improve gray hair repigmentation.

Melanocyte stem cells in hair follicles are key to understanding and potentially preventing hair graying.

Vitamin B supplements may reverse grey hair.

Hair can naturally regain color after greying, and this change may be linked to stress levels.

Luteolin can reduce hair graying in mice, with external treatment being more effective.