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

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.

Rhodococcus equi causes severe pneumonia in young foals, and effective vaccines are needed due to foals' weak immune responses.

Hair elemental analysis could be useful for health and exposure assessment but requires more standardization and research.

Melanocytes are crucial for skin pigmentation and can affect conditions like melanoma, vitiligo, and albinism, as well as hair color and hearing.

Mouse skin can produce and process serotonin, with variations depending on hair cycle, body location, and mouse strain.

Certain steroids in the brain affect mood and symptoms of depression, and treatments targeting these steroids show promise for improving these symptoms.

Menopause reduces skin collagen and elasticity, and while estrogen therapy can help, its risks require careful consideration.

Mesenchymal stem cells show potential for skin healing and anti-aging, but more research is needed for safe use, especially regarding stem cells from induced pluripotent sources.

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

Frequent hair coloring and styling can damage hair and cause breakage or loss.

Advanced hydrogel systems with therapeutic agents could greatly improve acute and chronic wound treatment.

No cure for female pattern hair loss, but various effective treatments exist.

Children with atopic dermatitis often have sleep problems due to itching and may benefit from melatonin, which helps with sleep and skin symptoms.

Nanotechnology in dermatology shows promise for better drug delivery and treatment effectiveness but requires more safety research.

Lower levels of certain brain chemicals are linked to worse PTSD symptoms in men.

People with late-stage HIV-1 often experience a specific type of hair loss linked to multiple factors, including nutritional issues and immune responses.

Advancements in creating skin grafts with biomaterials and stem cells are promising, but more research is needed for clinical application.

The article concludes that advancements in hair cosmetics require dermatologists to stay informed about products and their potential risks, including allergies and higher risks for hairdressers.

Drug repurposing is a cost-effective way to find new uses for existing drugs, speeding up treatment development.

Live imaging has advanced our understanding of stem cell behavior and raised new research questions.

Natural molecules like inositols, resveratrol, vitamins, and omega-3 fatty acids may help manage Polycystic Ovary Syndrome (PCOS), but their effects vary and need more exploration.

Photobiomodulation may help with hair growth and wound healing, but research is inconsistent and needs better quality studies.

New treatments targeting skin stem cells show promise for skin repair, anti-aging, and cancer therapy.

Platelet-Rich Plasma (PRP) shows promise for treating various skin conditions, but more research is needed to standardize its use.

The document explains hair biology, the causes of hair loss, and reviews various hair loss treatments.

Certain proteins are essential for the growth of root hairs in barley.

Hair restoration surgery effectively treats hair loss with natural-looking results, using techniques like stem cells and platelet-rich plasma.

The conclusion suggests a possible link between iron levels and hair health in women, recommending further research on iron supplementation for hair loss.

Finasteride and minoxidil are effective FDA-approved treatments for androgenetic alopecia.