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Opioid painkillers can cause many side effects, including breathing problems and addiction, but are generally considered safe when used properly.

Hair follicle stem cells are key for hair and skin regeneration, can be reprogrammed, and have potential therapeutic uses, but also carry a risk of cancer.

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

Exosomes could potentially enhance tissue repair and regeneration with lower rejection risk and easier production than live cell therapies.

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

Stem cell plasticity is crucial for wound healing but can also contribute to cancer development.

Targeting androgen receptors could be a promising way to treat skin disorders with fewer side effects.

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

The article concludes that the wool follicle is a valuable model for studying tissue interactions and has potential for genetic improvements in wool production.

Hair grows faster in the morning and is more vulnerable to damage from radiation due to the internal clock in hair follicle cells.

UV radiation can help sterilize wounds and promote healing but requires careful use to avoid damaging cells.

A genetic change in the EDAR gene causes the unique hair traits found in East Asians.

Androgens can both stimulate and cause hair loss, and understanding their effects is key to treating hair disorders.

Mice studies show that Protein Phosphatase 2A is crucial for cell growth, development, and disease prevention.

Trichoscopy is a useful non-invasive method for diagnosing different hair loss conditions.

Mutant mice help researchers understand hair growth and related genetic factors.

Circadian rhythms are crucial for stem cell function and tissue repair, and understanding them may improve aging and regeneration treatments.

Effective hair loss treatment in women requires correct diagnosis and can include medications like minoxidil, antiandrogens, and treatments for underlying conditions like PCOS.

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

Muscles and nerves that cause goosebumps also help control hair growth.

The circadian clock influences the behavior and regeneration of stem cells in the body.

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

The document concludes that there are no effective clinical treatments for hearing loss due to hair cell damage, but research is ongoing.

Kennedy's disease leads to muscle weakness and sensory issues, has no cure but manageable symptoms, and future treatments look promising.

Blocking the CXCR3 receptor reduces T cell accumulation in the skin and prevents hair loss in mice.

Some drugs can cause hair loss, and stopping these drugs often leads to hair regrowth.

The document concludes that understanding hair and feather regeneration can help develop new regenerative medicine strategies.

Certain signals and genes play a key role in hair growth and regeneration, and understanding these could lead to new treatments for skin regeneration.

Environmental factors at different levels control hair stem cell activity, which could lead to new hair growth and alopecia treatments.

Products should be called 'sperm-safe' only after thorough, well-designed tests.