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Environmental and cosmetic factors, including heat, chemicals, and sun exposure, can cause hair loss and damage.

Healthy scalp leads to better hair quality and less damage.

Particles around 100 nm can penetrate and stay in hair follicles without passing through healthy skin, making them safe for use in topical products and useful for targeted drug delivery.

Growing hair follicles have high mitochondrial activity and ROS in specific regions, aiding hair formation.

The study found specific hair and scalp patterns for different types of hair loss in Koreans, noting racial differences affect diagnosis.

Stem cells from hair follicles can safely treat hair loss.

Mechanical forces are crucial for shaping cells and forming tissues during development.

Hormones and stretching both needed for nipple area skin growth in mice.

A girl's severely tangled hair couldn't be fixed and had to be cut due to a rare condition called plica neuropathica.

Fetal wounds heal without scarring because of different biological factors, which could help improve adult wound healing.

Dynamic, light touch is sensed through a common mechanism involving Piezo2 channels in sensory axons.

Using human fat tissue derived stem cells in micrografts can safely and effectively increase hair density in people with hair loss.

EGF and FGF help hair growth by affecting cell differentiation and fiber growth.

Manipulating the catagen and telogen phases of hair growth could lead to treatments for hair disorders.

Nerves and chemicals in the body can affect hair growth and loss.

Wnt signaling helps control how brain stem cells divide and is important for brain repair after injury.

COVID-19 can cause various skin issues, including rashes and hair loss, which usually heal on their own and don't always indicate severe illness.

The enzymes 5α-reductase and 3α/β-hydroxysteroid oxidoreductase help create brain-active substances from progesterone and testosterone, which could be used for treatment, but more research is needed to ensure their safety and effectiveness.

Human hair varies widely and should be classified by curl type rather than race.

Using rodents for research shows that health problems in the womb can cause diseases later in life.

Some blood thinners can cause hair loss, but switching medications can stop it.

Micrografts are useful for healing wounds, regenerating bone and periodontal tissues, and improving hair transplantation outcomes.

Testosterone is important for men's sexual function, may help some women's sexual desire, while other hormones and neurotransmitters also play complex roles in sexual behavior.

Microspheres about 1.5 micrometers in size can best penetrate hair follicles, potentially reaching important stem cells.

Noggin is necessary to start the hair growth phase in skin after birth.

Stem cell therapy, particularly using certain types of cells, shows promise for treating hair loss by stimulating hair growth and development, but more extensive trials are needed to confirm these findings.

PRP injections may be a safe, effective alternative for hair loss treatment compared to minoxidil and finasteride.

Products should be called 'sperm-safe' only after thorough, well-designed tests.

Skin grafts are effective for chronic leg ulcers, especially autologous split-thickness grafts for venous ulcers, but more data is needed for diabetic ulcers.

Scalp skin barrier affects hair loss; personalized treatments needed.