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

Normal skin cell renewal doesn't need RAR signaling, but vitamin A-related skin thickening does.

Minoxidil shortens baldness from chemotherapy by 50.2 days without significant side effects.

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

Isotretinoin effectively treats severe acne and similar conditions, but has common, mostly reversible side effects, requiring careful patient monitoring.

Fat cells in the skin help start healing and form important repair cells after injury.

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

Testosterone's muscle-building effects do not require its conversion to DHT.

Finasteride effectively inhibits 5α reductase, while plant extracts like Permixon and Bazoton don't show significant results.

Diffuse alopecia in women may be related to androgens and iron deficiency, and basic hormone and nutrient screening is useful.

Most people on isotretinoin had chapped lips, but only a few stopped the medicine due to side effects.

Many women in southern China have polycystic ovary syndrome, with some symptoms differing from Western women.

Terbinafine quickly builds up in skin and hair, staying effective for over 3 weeks.

Minoxidil can help grow hair in mice by making cells grow and improving hair quality. More research needed.

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

A simple screening method found that 6.3% of women in a semiurban area in Sri Lanka have polycystic ovary syndrome, with most showing menstrual irregularities.

Platelet-rich plasma might help with hair growth and skin conditions, but more research is needed to prove its effectiveness and safety.

Modern lifestyles, including poor diet, stress, and long-term use of certain medications, hinder the body's ability to heal from inflammation, leading to chronic diseases.

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.

Finasteride and minoxidil are effective for hair regrowth, while treatments for alopecia areata have varying success and continuous treatment is necessary.

Minoxidil effectively treats hair loss, but use cautiously and monitor side effects.

The update highlights that non-classic congenital adrenal hyperplasia is common in women with excess male hormones, requires specific hormone tests for diagnosis, and has various treatment options depending on age and symptoms.

Macrophages help regrow hair by activating stem cells using AKT/β-catenin and TNF.

The conclusion is that the increasing use of drugs for lifestyle reasons is a complex issue influenced by corporate profit, consumer behavior, and the medicalization of everyday life, with potential negative effects on personal well-being.

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

The research identified various cell types in mouse and human teeth, which could help in developing dental regenerative treatments.

Scientists turned rat thymus cells into stem cells that can help repair skin and hair.

Flutamide rarely causes liver toxicity in prostate cancer patients.

Platelet-rich plasma (PRP) is a cheap and easy treatment for hair loss, but not suitable for everyone. It also helps in healing ulcers, rejuvenating skin, and improving hair transplants.

Children, especially teenagers, can get severe SARS-CoV infection with symptoms similar to adults, but they typically recover well with supportive care.