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Hair growth is influenced by hormones and goes through different phases; androgens can both promote and inhibit hair growth depending on the body area.

New understanding and treatments for hair loss are improving, but more research is needed.

Latanoprost can make eyelashes longer, thicker, and darker.

Pangolins have lost some skin-related genes, but kept others, leading to their unique scales and skin features.

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

Circadian clock genes are important for hair growth and may affect aging-related hair loss and graying.

Antiviral drugs, especially daclatasvir, may be a new treatment for a rare skin disease, improving survival and reducing symptoms in mice.

Hormones like testosterone and estrogen significantly affect hair growth and structure.

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

Poplar seed hairs grow from the placenta at the ovary base, with endoreduplication playing a key role in their development, and share similar cellulose synthesis processes with cotton fibers.

New research suggests that skin cell renewal may not require a special type of cell previously thought to be essential.

Vitamin D has potential benefits for cancer prevention, heart health, diabetes, obesity, muscle function, skin health, and immune function, but clinical results are mixed and more research is needed.

Stress hormone corticosterone blocks a growth factor to slow down hair stem cell activity and hair growth.

The document concludes that choosing the right face rejuvenation technique depends on the individual's unique features and aesthetic goals.

Gut flora changes could potentially indicate depression, but more research is needed.

Some existing drugs and natural products might work against COVID-19 by targeting the virus's main protease.

Antioxidants may help improve mitochondrial health and could be used to treat diseases related to cell damage.

Demodex may be linked to blepharitis, and treatments like tea tree oil and ivermectin can help.

Natural products like propolis are causing more skin allergies, and certain skin treatments and medications have various side effects and risks.

Human skin can make serotonin and melatonin, which help protect and maintain it.

Dextran sulfate was found to be toxic and ineffective for treating HIV.

Some viruses can cause cancer by changing cell processes and avoiding the immune system; vaccines and targeted treatments help reduce these cancers.

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

Men, especially older ones with health issues like prostate cancer, may have worse COVID-19 outcomes and could benefit from therapies targeting male hormones.

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.

A new mutation in the human glucocorticoid receptor reduces its function and causes resistance to glucocorticoids.

Prolactin affects hair growth cycles and can cause early hair follicle regression.

The skin protects the body and is constantly renewed by stem cells; disruptions can lead to cancer.

Beta-sitosterol has potential health benefits but needs more research to fully understand its effects and improve its use in treatments.