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

Trichotillomania, a disorder where people compulsively pull out their own hair, often starts around age 12, is more common in adult females, and can be treated with behavior therapy and medication.

In 2011, hair restoration was a specialized field in plastic surgery, using techniques like "Ultrarefined follicular unit hair transplantation" to minimize scarring and promote hair growth, with future treatments like stem cell therapy and hair cloning still being tested.

Hair elemental analysis could be useful for health and exposure assessment but requires more standardization and research.

Centipedegrass extract may promote hair growth by activating certain cell pathways.

Understanding hair biology is key to developing better treatments for hair and scalp issues.

A new mouse model using pyroxylin can promote hair growth and may help develop human hair growth treatments.

Herbs like hibiscus, onion, and aloe vera may help hair growth and are good alternatives to conventional treatments.

Hormones and neuroendocrine factors control hair growth and color, and more research could lead to new hair treatment options.

STAT5 activation is crucial for starting the hair growth phase.

Shi-Bi-Man activates hair follicle stem cells and promotes hair growth by changing lactic acid metabolism and other cellular processes.

Applying certain inhibitors to the skin can promote hair growth without harming cells.

Hair quality is genetically determined and linked to its composition and strength.

Mouse skin glands need healthy nerves to grow properly during hair growth phases.

Muscles and nerves that cause goosebumps also help control hair growth.

Rosehip oil reduces wrinkles and UV spots and may have antimicrobial benefits.

Minoxidil and Finasteride are effective for male baldness; more research is needed for hair aging treatments.

Early baldness in men may indicate risks for obesity, metabolic syndrome, insulin resistance, and heart disease, similar to women with PCOS. Alopecia areata is often linked with autoimmune diseases and mental health issues. Certain hair disorders are due to genetic issues, and chemotherapy can cause hair loss through specific biological pathways. Iron deficiency's link to hair loss is still disputed.

Thyroid problems can cause hair loss and change hair texture.

Gray hair may be caused by lower antioxidant activity in hair cells.

Trichoscopy is useful for diagnosing hair and scalp disorders in people with darker skin.

Chemotherapy-induced hair loss is partly due to decreased laminin-511 and increased laminin-332.

Menopause can cause hair thinning and texture changes due to hormonal and metabolic shifts.

Nanotechnology could improve hair regrowth but faces challenges like complexity and safety concerns.

Minoxidil and finasteride effectively treat hair loss.

High hair cortisol levels indicate stress in cows due to poor shelter conditions and health issues.

Dog skin with hair loss, when transplanted to mice, regrew hair, suggesting the hair loss cause is likely body-wide, not skin-specific.

Finasteride can treat hair loss, but may have side effects; evaluate and inform patients of risks.

Obesity and bariatric surgery can cause hair thinning and temporary hair loss due to nutritional deficiencies and stress.

Hair follicle stem cells help maintain skin health and could improve skin replacement therapies.