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Hair cortisol is a reliable stress indicator in cattle but may not be valid for pigs.

Scientists turned mouse stem cells into skin cells that can grow into skin layers and structures.

The skin has multiple layers and cells, serves as a protective barrier, helps regulate temperature, enables sensation, affects appearance, and is involved in vitamin D synthesis.

Pregnancy can cause skin changes and may affect pre-existing skin conditions, with some treatments not safe for use during pregnancy.

Aging reduces the ability of human hair follicle cells to form new cell colonies.

Mummy hair from the Taklamakan desert has calcium and phosphorus inside.

The interdigital gland in crossbred sheep is similar to skin and has specialized structures for secretion.

Long-term testosterone therapy can cause hormone suppression, affect prostate and heart health, and alter physical characteristics, but does not increase prostate cancer risk and needs more research for full risk assessment.

Aging can lead to poorer scalp and hair health, including less hair and more scalp diseases, which should be managed to help older people feel better.

Most vertebrates can regenerate skin, nails, and corneas, but only some can regenerate teeth and lenses.

Hair can accurately predict iron levels in cattle muscle, helping diagnose mineral imbalances.

Human hair has a new region with ordered filaments and the cuticle contains β-keratin sheets.

Taking too much biotin can mess up blood test results, which might lead to wrong diagnoses and treatments.

Amenorrhea, or missing periods, is caused by various factors and is treated based on the specific cause.

Alopecia areata is an incurable autoimmune condition causing hair loss, with research aiming for better treatments.

Vitamin supplements may not improve hair thickness or density in patients with non-scarring hair loss.

A specific genetic change in the KRT71 gene causes a hair loss condition in Hereford cattle.

Recognizing congenital triangular alopecia is crucial to avoid unnecessary treatments.

Melatonin makes cashmere grow earlier and more by increasing certain gene activity in goats.

Verteporfin treatment in mice led to complete skin healing without scarring.

Panax ginseng helps prevent hair follicle cell death and speeds up hair cell recovery after radiation in mice.

Hair follicle stem cells use specific chromatin changes to control their growth and differentiation.

Minoxidil stops cells from making prostacyclin, which may help with hair growth. More research is needed.

People with hair loss feel more depressed and anxious, especially women, and need help managing emotions and beliefs about their condition.

Steroid use can cause a rare eye condition called central serous retinopathy, which can lead to permanent vision damage.

Ketoconazole shampoo can cause rare pink hair discoloration.

Hair restoration surgery, done under local anesthesia, is used to hide scalp scars and treat certain alopecia stages, relying on transplant design and patient understanding for success.

A robotic device could improve surgical hair restoration, but it needs more testing to confirm its effectiveness compared to current methods.

Some hormone-related drugs may protect brain cells in Parkinson's disease differently in men and women.