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Hair follicles produce and respond to melatonin, affecting hair growth and sensitivity to estrogen.

Applying a special compound can promote hair growth without harmful side effects.

Mouse skin can produce and process serotonin, with variations depending on hair cycle, body location, and mouse strain.

Certain genes control the color of human hair by affecting pigment production.

The document concludes that for hair and feather growth, it's better to target the environment around stem cells than the cells themselves.

Thuja orientalis hot water extract may help hair grow by starting the growth phase and improving hair follicle development.

UVB radiation harms hair growth and health, causing cell death and other changes in human hair follicles.

miR-22, a type of microRNA, controls hair growth and its overproduction can cause hair loss, while its absence can speed up hair growth.

Maintaining the right amount of retinoic acid is crucial for healthy hair and skin.

Disrupting Acvr1b in mice causes severe hair loss and thicker skin.

Mice lacking Insig proteins had hair growth problems due to cholesterol buildup, but this was fixed by the drug simvastatin.

Testosterone and dihydrotestosterone affect hair growth, and new techniques like the folliculogram help study it, but fully understanding hair growth is still complex.

α3β1-integrin is crucial for maintaining normal hair follicle shape and function but not needed for the development of the surrounding skin.

Researchers developed a 3D model of human hair follicle cells that can help understand hair growth and test new hair loss treatments.

FGF5s can block the effects of FGF5, which may help control hair growth in cashmere goats.

Early and personalized treatment for hair loss in young people is crucial to prevent permanent damage and should include psychological support.

Tiny particles called extracellular vesicles could help with skin healing and hair growth, but more research is needed.

Mice are useful for researching human hair loss and testing treatments, despite some differences between species.

Red ginseng oil and its components help promote hair regrowth and could treat hair loss.

Human hair follicle stem cells show signs of low oxygen levels, which may be important for hair growth and preventing baldness.

Smad1 and Smad5 are essential for hair follicle development and stem cell sleepiness.

The article concludes that developing in vitro models for human hair structures is important for research and reducing animal testing, but there are challenges like obtaining suitable samples and the models' limitations.

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

Gata6 is important for protecting hair growth cells from DNA damage and keeping normal hair growth.

Arachidonic acid helps hair grow by increasing growth factors and improving follicle health.

Cyclosporine A promotes hair growth and prolongs the active growth phase in human hair follicles, but may work differently than in rodents.

Understanding glycans and enzymes that alter them is key to controlling hair growth.

Certain electric currents can promote hair growth by activating specific cell pathways.

Laser therapy and hair growth factors significantly improve hair density in male baldness.

Cashmere and milk goats have different hair growth cycles and gene expressions, which could help improve wool production.