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

New targets for making and using brain-synthesized steroids could lead to better treatments for brain disorders and alcoholism.

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

The document describes how to tell different types of non-scarring hair loss apart by looking at hair and scalp tissue under a microscope.

Asia has made significant progress in tissue engineering and regenerative medicine, but wider clinical use requires more development.

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.

Tiny particles from stem cells help activate hair growth cells and encourage hair growth in mice without being toxic.

Platelet-rich plasma may help with hair growth and skin quality but more research is needed to confirm its effectiveness.

Lignans and neolignans from plants may help protect against various health issues, including cancer and heart disease.

Blocking the Wnt pathway could lead to new treatments for cancer and tissue repair but requires careful development to avoid side effects.

Preoperative pain assessment, regional anesthesia, and vitamin C can help prevent CRPS after surgery.

Activating TRPV3 stops human hair growth.

FGF signaling is a promising target for developing treatments for wounds, metabolic diseases, and cancer.

Chemotherapy often causes temporary hair loss, which is distressing and needs better treatment and support.

Nerves and chemicals in the body can affect hair growth and loss.

There are many treatments for permanent hair loss disorders, but their effectiveness varies and there's no clear best option.

Traction alopecia is more common in African women than girls, especially when traction is applied to chemically relaxed hair; avoiding such hairstyles may reduce the risk.

The document concludes that accurate diagnosis of different types of hair loss requires careful examination of hair and scalp tissue, considering both clinical and microscopic features.

Trichoscopy helps diagnose and monitor alopecia areata by looking at a combination of specific hair and scalp features.

Conditioned media from mesenchymal stem cell cultures could be a more effective alternative for regenerative therapies, but more research is needed.

Type 2 diabetes, bacterial scalp infections, and tight hairstyles like braids and weaves are linked to a higher risk of a scarring hair loss condition in African American women.

PRP shows potential for treating female hair loss, but more research needed.

Gynecologists should provide comprehensive care for transgender patients, including mental health evaluation, hormone therapy, and surgical options, while monitoring for side effects and ensuring patient safety.

The document concludes that cosmetic surgery is still mainly a practice for women and the gender gap in this field is expected to continue.

New methods for skin and nerve regeneration can improve healing and feeling after burns.

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

Memantine may slightly improve memory in people with Down syndrome, but more research is needed.

The document concludes that minoxidil and finasteride are proven for hair growth, herbal remedies show promise, but more research is needed to confirm their effectiveness.

Hair shedding is an active process that could be targeted to treat hair loss.