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Melatonin, usually known for sleep regulation, also has antioxidant properties that can protect skin, stimulate hair growth, and improve skin conditions, with topical application being more effective than oral use.

Injecting alpha-melanocyte-stimulating hormone in mice improved skin healing and reduced scarring.

Topical melatonin is a safe treatment that may reduce hair loss in people with androgenetic alopecia.

Melatonin and mitotane treatment led to hair re-growth in 62% of dogs with Alopecia X, but this was not always linked to normal hormone levels.

Lower MC2R expression may contribute to alopecia areata.

HPT axis hormones boost mitochondrial function and growth in hair follicles, potentially aiding hair health.

Facial dark spots can be caused by the sun, genetics, makeup, or medicine, and are diagnosed by patient history and skin tests.

Melatonin may help with sleep issues, depression, and cancer, but more research is needed.

Melatonin may protect skin from radiation, but its effects on aging and hair growth are unclear.

Melanocyte stem cells in hair follicles are key for hair color and could help treat greying and pigment disorders.

Hair color is determined by melanins produced in hair cells.

The paper concludes that understanding melanocyte development can help in insights into skin diseases and melanoma diversity.

Transgender women on estrogen therapy can develop melasma and need proper skin care.

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

Iron deficiency can cause hair color changes, which can be reversed with iron supplements.

Hormones significantly affect skin health, with vitamin D playing a key role.

Human hair follicles can produce cortisol like the body's stress response system.

Epimedium extract helps increase skin pigmentation and could be a new treatment for conditions with reduced pigmentation.

A new skin-whitening agent using a peptide from wheat is safe and effective at reducing skin pigmentation.

Melatonin helps hair grow by activating a specific signaling pathway.

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

Topical melatonin may reduce skin aging by inhibiting certain cellular pathways.

The document concludes that pigmentation disorders in animals involve complex interactions between melanocytes and keratinocytes.

Stress can cause hair to turn gray by depleting stem cells.

Quercetin boosts melanin production in mouse hair follicles.

Androgens increase pigmentation in certain hamster skin areas, but estrogens can reverse this effect.

Melanocytes from human fetal hair follicles were successfully cultured, showing potential for hair disease research and clinical use.

Different melanocyte types in hair follicles either survive or die during the catagen phase.

The Skin POMC System affects hair growth and skin responses to stress.

Synthetic melanin applied to skin speeds up wound healing.