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Metformin helps with menstrual cycles and insulin levels in PCOS but is less effective for hair growth, diabetes prevention, and weight loss, and may improve fertility and reduce diabetes risk.

Air pollution worsens skin diseases and aging by causing inflammation and oxidative stress.

Certain proteins, Lgr5 and Lgr6, are important markers of adult stem cells and are involved in tissue repair and cancer development.

Alopecia areata is an autoimmune condition causing hair loss, influenced by genetics, stress, and diet, and may be prevented by a high soy oil diet.

Epithelial-mesenchymal interactions control hair growth cycles through specific molecular signals.

The skin's layers protect, sense, and regulate the body's internal balance, but can be prone to cancer.

The secretome from mesenchymal stem cells is a promising treatment that may repair tissue and avoid side effects of stem cell transplantation.

Melatonin in the skin helps protect against damage from stress and UV rays, and could be used to treat certain skin conditions.

Human skin can make serotonin and melatonin.

The document concludes that understanding hair follicle biology can lead to better hair loss treatments.

Insulin resistance and obesity are key factors in the development and worsening of polycystic ovary syndrome, and lifestyle changes are important for managing it.

The document provides a method to classify human hair growth stages using a model with human scalp on mice, aiming to standardize hair research.

Noggin is necessary to start the hair growth phase in skin after birth.

Hair color production in mice is closely linked to the hair growth phase and may also influence hair growth itself.

Metformin helps manage polycystic ovary syndrome by improving insulin resistance and ovulation, but more research is needed on its full effects.

Male and female bodies respond differently to stress, influenced by hormones and development stages, with implications for stress-related diseases.

Alopecia areata is likely an autoimmune disease with unclear triggers, involving various immune cells and molecules, and currently has no cure.

Regenerated fully functional hair follicles using stem cells, with potential for hair regrowth therapy.

Bone Morphogenetic Proteins (BMPs) help control skin health, hair growth, and color, and could potentially be used to treat skin and hair disorders.

Low-Level Laser Therapy is effective and safe for hair growth with minimal side effects.

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.

The document concludes that more research is needed to better understand and treat primary cicatricial alopecias, and suggests a possible reclassification based on molecular pathways.

Alopecia areata is an autoimmune disease causing patchy hair loss, often with other autoimmune disorders, but its exact causes are unknown.

Alopecia areata is a common autoimmune disease affecting about 2% of people, causing significant disability and often associated with mental health issues and other autoimmune conditions.

Postpartum depression is linked to changes in brain chemicals, inflammation, stress, and certain genes, and can potentially be identified by markers like specific steroids, serotonin levels, and vitamin D levels.

The conclusion is that PCOS is caused by ovarian sensitivity to hormones and disrupted hormone control, possibly due to ovarian factors, and more research is needed.

Janus kinase inhibitors are promising treatments for autoimmune skin diseases like eczema and psoriasis.

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

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

Potassium channel openers are effective in treating heart conditions, high blood pressure, pulmonary diseases, bladder issues, and hair loss, but more selective drugs are needed.