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Parathyroid hormones are important for hair growth, but their use in treating hair loss from chemotherapy is still uncertain.

Aging causes hair to gray and thin, with the timing of graying varying by race, and factors like oxidative stress and genetics can lead to hair loss.

Natural products may help treat hair loss by promoting hair growth with fewer side effects.

The conclusion is that exogen is a unique hair cycle phase and the new sampling method specifically targets this stage, which may help in future hair loss research.

Researchers found 617 genes that behave differently in cashmere goat hair follicles, which could help understand hair growth.

miR-218-5p helps skin and hair growth by targeting SFRP2 and activating a specific signaling pathway.

African hair has the most lipids, while Caucasian hair is more hydrated and stronger.

Chrysanthemum zawadskii extract helps hair grow by stimulating hair cells.

HFMs can help study hair growth and test potential hair growth drugs.

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.

Wnt10b makes hair follicles bigger, but DKK1 can reverse this effect.

Activating the Wnt/β-catenin pathway could lead to new hair loss treatments.

Some plant-based ingredients may help with hair growth and care, but more research is needed to confirm their effectiveness.

Human hair keratins can self-assemble and support cell growth, useful for biomedical applications.

Asian hair is generally straight and thick, with unique disorders and properties, and more research is needed to understand it fully.

Researchers created a mouse with the same mutation as humans with trichothiodystrophy, showing similar symptoms and confirming the condition is due to defects in DNA repair and gene activity.

Melanoma development can be linked to the breakdown of skin's melanin-producing units.

Male pattern baldness may be caused by factors like poor blood circulation, scalp tension, stress, and hormonal imbalances, but the exact causes are still unclear.

Enzymes xylanase and pectinase clean wool and specialty hair fibers effectively without damage, offering an eco-friendly alternative to soap and hot water.

Natural products and phytochemicals may help with hair regrowth, but more research is needed.

Male hormones cause different growth in identical human hair follicles due to their unique epigenetic characteristics.

Sex hormones affect hair and feather growth and may help manage alopecia and hormone-dependent cancers.

Inflammation may be linked to hair loss, and targeting specific enzymes could help treat it.

Androgen receptor signaling causes early aging of cells important for hair growth by damaging their DNA.

Tiny RNA molecules help control the growth of plant hairs.

Cannabinoids might help treat skin problems but more research is needed to be sure.

Melatonin helps Cashmere goat hair follicles grow by affecting stem cell signals and the surrounding microenvironment.

Melatonin helps Cashmere goats grow more hair by affecting genes and cell signals important for hair and blood vessel development.

Ginseng, especially its component ginsenosides, can promote hair growth, reduce hair loss, and potentially treat conditions like alopecia by affecting cell pathways and cytokines.

The document concludes that understanding hair follicle cell cycles is crucial for hair growth and alopecia research, and recommends specific techniques and future research directions.