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Different types of stem cells exist within individual skin layers, and they can adapt to damage, transplantation, or tumor growth. These cells are regulated by their environment and genetic factors. Tumor growth is driven by expanding, genetically altered cells, not long-lived mutant stem cells. There's evidence of cancer stem cells in skin tumors. Other cells, bacteria, and genetic factors help maintain balance and contribute to disease progression. A method for growing mini organs from single cells has been developed.

Prolactin contributes to hair loss by promoting hair follicle shrinkage and cell death.

Men generally have more severe COVID-19 cases and higher death rates than women due to biological differences.

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

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.

Hair, teeth, and mammary glands develop similarly at first but use different genes later.

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

Activating TRPV3 stops human hair growth.

Hormones and metabolism play a complex role in prostate enlargement, and more research is needed to improve diagnosis and treatment.

The document concludes that understanding the genes and pathways involved in hair growth is crucial for developing treatments for hair diseases.

Human beard hair medulla contains a unique and complex mix of keratins not found in other human tissues.

Correcting nutrient deficiencies may help with hair loss, but the benefits of supplements without a deficiency are uncertain and could be harmful.

Some common medications can harm male fertility, but many effects can be reversed.

5α-reductase inhibitors can cause sexual problems, higher risk of aggressive prostate cancer, and depression.

Cyclosporine A may help treat hair loss by blocking a protein that inhibits hair growth.

Hair greying is caused by oxidative stress damaging hair follicles and melanocytes.

Neurosteroids show promise for treating epilepsy and more research is needed.

Lamins are vital for cell survival, organ development, and preventing premature aging.

Scalp cooling can prevent chemotherapy-induced hair loss, and certain treatments can speed up hair regrowth, but more research is needed for better treatments.

Prolactin affects the production of different keratins in human hair, which could lead to new treatments for skin and hair disorders.

People with alopecia areata often have lower levels of vitamin D, zinc, and folate, but more research is needed to understand if supplements can help treat it.

A second domain of high sulfur KAP genes on chromosome 21q23 is crucial for hair structure.

Fadrozole and finasteride change gene expression related to sex hormones and thyroid hormones in frog larvae development.

The extracellular matrix is crucial for controlling skin stem cell behavior and health.

Brain hormones significantly affect hair color and could potentially be used to prevent or reverse grey hair.

Targeting glucocorticoid action might help treat type-2 diabetes, but human trials are needed.

Cannabinoids may help treat chronic and chemotherapy-induced neuropathic pain, but more research is needed to confirm their effectiveness and safety.

Thyrotropin-Releasing Hormone helps heal wounds in frog and human skin.

FLRG and follistatin have different roles in wound healing.

Type 3 5α-reductase is more common and finasteride and dutasteride strongly inhibit it.