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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.

The document concludes that for hair and feather growth, it's better to target the environment around stem cells than the cells themselves.

Skin problems can be caused or worsened by physical forces and pressure on the skin.

Skin stem cells maintain and repair the outer layer of skin, with some types being essential for healing wounds.

AGD1 is important for root hair development in Arabidopsis, working with phosphoinositide signaling and the actin cytoskeleton.

Human liver cells stick to hair protein materials mainly through the liver's asialoglycoprotein receptor.

Finasteride for hair loss may cause persistent sexual symptoms, depression, anxiety, and lower quality of life.

The control system for hair growth cycles is not well understood and needs more research.

Skin fat plays a key role in immune defense and healing beyond just storing energy.

Plant steroid hormones show growth, health, and medicinal benefits in various organisms, including potential for treating diseases.

Understanding the fruiting patterns of Ficus trees can improve forest restoration by ensuring pollinators survive and biodiversity is supported.

Microneedle arrays with nanotechnology show promise for painless drug delivery through the skin but need more research on safety and effectiveness.

Hair growth is influenced by various body and external factors, and neighboring hairs communicate to synchronize regeneration.

Skin aging is largely due to differences in stiffness and elasticity between skin layers, leading to wrinkles.

A substance called VIP might protect hair follicles from being attacked by the immune system, and problems with VIP signaling could lead to hair loss in alopecia areata.

The study found that women with PCOS have more and larger ovarian follicles and differences in ovarian structure, but these features alone can't always diagnose PCOS.

Hair loss in male pattern baldness involves muscle degeneration and increased scalp fat.

Finasteride treatment changes brain steroid levels and receptors, affecting brain function even after stopping treatment.

Targeting CD200 could be a new treatment for rheumatoid arthritis.

BMP2 needs periosteal tissue to help regenerate mouse middle finger bones within a specific time.

The arrector pili muscle might play a role in hair loss and needs more research to understand its impact.

Smad1 and Smad5 are essential for hair follicle development and stem cell sleepiness.

Human hair keratin fibers have a detailed nano-scale structure that changes with different conditions.

High-content screening is useful for finding new treatments for rare diseases and has led to FDA-approved drugs.

Testosterone therapy can improve sexual desire and function in postmenopausal women but should be used cautiously and not based solely on testosterone levels.

New treatments for low male hormones improved sexual function and mood but had unclear risks, especially for older men.

Skin lymphatic vessels are essential for hair growth.

Altered retinoid metabolism in cicatricial alopecia suggests a balanced vitamin A diet may prevent the condition.

Androgens affect bone and fat cell development differently based on the cells' embryonic origin.