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Estrogen replacement can improve skin health in menopausal women but doesn't reverse sun damage or prevent hair loss.

The HR protein helps hair grow by blocking a hair growth inhibitor, aiding in hair follicle regeneration.

Estrogen loss during menopause worsens skin health, but hormone replacement therapy may improve it, though more research is needed.

Horizontally sectioned scalp biopsies are more reliable for diagnosing hair loss in women when three samples are taken instead of one.

Stem cells in the hair follicle are regulated by their surrounding environment, which is important for hair growth.

Some vitamins and minerals like vitamin D and iron can help with certain types of hair loss, but more research is needed for others.

Different types of stem cells and their environments are key to skin repair and maintenance.

TGF-β signaling is crucial for stem cell maintenance, differentiation, and has implications for cancer treatment.

Modulating BMP activity changes the number, size, shape, and type of ectodermal organs.

Human hair follicle organ culture is a useful model for hair research with potential for studying hair biology and testing treatments.

The skin's internal clock affects healing, cancer risk, aging, immunity, and hair growth, and disruptions can harm skin health.

Low doses of some substances can be beneficial, while high doses can be harmful or toxic.

Mice hair growth patterns get more complex with age and can change with events like pregnancy or injury.

Stress can stop hair growth in mice, and treatments can reverse this effect.

Oxidative stress contributes to hair graying and loss as we age.

The document concludes that understanding hair structure is key to diagnosing hair abnormalities and recommends gentle hair care for management.

Janus kinase inhibitors are promising treatments for autoimmune skin diseases like eczema and psoriasis.

TRP channels in the skin are important for sensation and health, and targeting them could help treat skin disorders.

Dexamethasone speeds up hair loss in mice, while cyclosporin A slows it down.

Hair follicles produce and respond to melatonin, affecting hair growth and sensitivity to estrogen.

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 telogen phase of hair growth is active and important for preparing hair follicles for regeneration, not just a resting stage.

Understanding how cells die in the skin is important for treating skin diseases and preventing hair loss.

The document concludes that while significant progress has been made in understanding skin biology and stem cells, more research is needed to fully understand their interactions with their environment.

Adult female acne treatment should be personalized, considering individual preferences and pregnancy, using various topical and oral medications while managing side effects and resistance.

Flutamide rarely causes liver toxicity in prostate cancer patients.

Animals that change color with the seasons mainly do so in response to daylight changes, but climate change is causing camouflage problems that may require evolutionary changes.

Melatonin helps regulate hair growth and protects the hair follicle from stress.

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

The document concludes that hair is complex, with a detailed growth cycle, structure, and clinical importance, affecting various scientific and medical fields.