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The article concludes that the global hair trade is exploitative and reflects complex cultural and economic issues.

Cannabinoid receptor-1 signaling is essential for the survival and growth of human hair follicle stem cells.

Tofacitinib, an arthritis drug, helped hair growth in alopecia universalis but long-term safety needs more research.

Hair growth environment recreated with challenges; stem cells make successful skin organoids.

Immunization and throat bacteria may increase the risk of a hair loss condition called alopecia areata.

Keratinocytes and adipose-derived stem cells can effectively heal difficult skin wounds.

Human hair keratins can be turned into useful 3D biomedical scaffolds through a freeze-thaw process.

Some existing drugs and natural products might work against COVID-19 by targeting the virus's main protease.

The secretions of mesenchymal stem cells could be used for healing without using the cells themselves.

Tofacitinib is safe and effective for severe alopecia areata, but hair loss may return 2 months after stopping treatment.

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

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

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

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

Melatonin helps regulate hair growth and protects the hair follicle from stress.

The conclusion is that hair growth can be improved by activating hair cycles, changing the surrounding environment, healing wounds to create new hair follicles, and using stem cell technology.

Antioxidants may help fight oxidative stress linked to autoimmune skin diseases.

UVB radiation harms hair growth and health, causing cell death and other changes in human hair follicles.

The document explains hair growth and shedding, factors affecting it, and methods to evaluate hair loss, emphasizing the importance of skin biopsy for diagnosis.

COVID-19 might affect male fertility, but more research is needed to understand the full impact.

Kids with alopecia areata may experience more stress but not necessarily feel more anxious or depressed than others.

Current and future treatments for alopecia areata focus on immunosuppression, immunomodulation, and protecting hair follicles.

Antimicrobial lotion reduces inflammation and increases hair density in hair loss patients.

Madarosis is the loss of eyelashes and eyebrows due to various health issues and requires thorough examination to diagnose and treat the underlying cause.

Chemotherapy causes permanent hair follicle damage by triggering stem cell loss.

Some breast cancer patients developed permanent hair loss after chemotherapy and hormonal therapy, showing patterns similar to common baldness and alopecia areata.

Using a special laser can improve how well hair loss treatments get into the skin and hair follicles.

Some medications might reverse gray hair, especially those that reduce inflammation or stimulate pigment production, and vitamin B might help.

Researchers found genes that control hair color and growth change before the visible coat color changes in snowshoe hares.

The review found that different stem cell types in the skin are crucial for repair and could help treat skin diseases and cancer.