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Hair ages due to genetics and environmental factors, leading to graying and thinning, with treatments available for some conditions.

The document explains how hair is studied in forensics to identify its source and its role in criminal investigations.

Cucurbitacin helps mice grow hair by blocking a protein that stops hair growth.

Stress hormone stops a growth signal and keeps hair stem cells inactive, reducing hair growth.

Crataegus pinnatifida extract may help increase hair growth and thickness in mice.

Erica multiflora plant extract can help hair grow by stimulating growth-related cells and triggering hair cycle changes.

Massaging the scalp with a cosmetic containing certain natural inhibitors can significantly regrow hair in men with pattern baldness.

Probiotics help reduce hair loss and increase hair growth in people with androgenic alopecia.

Seasonal changes affect hair growth genes in Angora goats, possibly influencing mohair quality.

Many new moms lose hair after childbirth due to hormonal changes, but it usually grows back within a year.

Melatonin affects certain genes and pathways involved in cashmere goat hair growth.

Estrogens significantly influence hair growth by interacting with receptors in hair follicles and may help regulate the hair growth cycle.

The document describes how to tell different types of non-scarring hair loss apart by looking at hair and scalp tissue under a microscope.

The document concludes that assessing hair follicle damage due to cyclophosphamide in mice involves analyzing structural changes and suggests a scoring system for standardized evaluation.

Male pattern baldness involves smaller hair follicles, larger oil glands, and other tissue changes, but not major blood supply issues.

Inactive hair follicle stem cells help prevent skin cancer.

Mice with too much Claudin-6 have skin barrier problems and abnormal hair growth.

The document explains hair growth and shedding, factors affecting it, and methods to evaluate hair loss, emphasizing the importance of skin biopsy for diagnosis.

Both immature and mature fat cells are important for hair growth cycles, with immature cells promoting growth and mature cells possibly inhibiting it.

The research identified genes and pathways important for sheep wool growth and shedding.

Basonuclin 2 is vital for the development of facial bones, hair follicles, and male germ cells in adult mice, and its absence can lead to dwarfism and abnormal follicles.

Liaoning Cashmere goat hair follicles show synchronized growth patterns with lowest activity in May.

Herbs might help with hair loss, but more research is needed to confirm their safety and effectiveness.

Different genes are active in dogs' hair growth and skin, similar to humans, which helps understand dog skin and hair diseases and can relate to human conditions.

The document concludes that hair loss is complex, affects many people, has limited treatments, and requires more research on its causes and psychological impact.

The combination of Arginine Silicate Inositol Complex and a new form of Biotin improved hair and nail growth in rats.

Hair diameter diversity is a key sign for diagnosing and managing male pattern baldness.

Some medications can cause reversible hair loss by affecting hair growth cycles.

Estrogen affects hair growth and skin cell multiplication.

Bimatoprost is effective for growing longer, thicker, and darker eyelashes.