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About 21.3% of young, healthy Chinese men experience hair loss. Hairlines are mostly linear or have a central protrusion. Hair is densest on the top and back of the head, and hair follicles usually have 1 or 2 hairs. This information can help in designing hair restoration procedures.

Home-use lasers and IPL devices are unlikely to directly cause paradoxical hair growth; it may be linked to inflammation or hormonal issues.

Mouse hair follicle stem cells were successfully isolated and used to regenerate hair follicles with two different methods.

Thicker hair grows faster; hair loss patients have slower growth.

The document concludes that periocular hair disorders have various causes and treatments, and proper evaluation by specialists is important for management and prognosis.

Stress may affect hair growth by influencing hair follicle development and could contribute to hair loss.

Transplanting growing hair follicles into scars can help regenerate and improve scar tissue.

Rabbit skin with active hair growth shows thicker, redder areas due to larger, more numerous hair follicles and increased blood vessels.

Gamma-rays exposure during the resting phase of hair growth can damage hair regeneration and color in mice.

Intense pulsed light treatment mainly damages pigmented hair parts but spares stem cells, allowing hair to regrow.

CD90 is present on specific cells in dog hair follicles.

By 2004, Follicular Unit Transplantation (FUT) was the most effective method for surgical hair restoration, while the newer Follicular Unit Extraction (FUE) had more disadvantages and was less recommended.

A specific type of skin cell creates an opening for hair to grow out, and problems with this process can lead to skin conditions.

Scarring hair loss found in female pattern; biopsy needed for diagnosis.

Hair transplantation using micrografts and minigrafts is effective and safe for facial and scalp reconstruction with natural-looking results.

Unsatisfactory hair restoration results can be significantly improved with strategic hair redistribution and new donor hair placement, despite previous surgery challenges.

Naked hair shafts are significantly associated with scarring hair loss and may help diagnose it, especially when multiple are found.

The research provides a gene-based framework for hair biology, highlighting the Hippo pathway's importance and suggesting links between hair disorders, cancer pathways, and the immune system.

Hair and wool strength is affected by the number and type of bonds in their protein structures, with hair having more protein aggregates than wool.

Transplanted hair follicles can change and adapt to new areas of the body, with the immune system possibly playing a role in this adjustment.

New biopsy techniques and tools improve alopecia diagnosis, and both too much and too little selenium can cause hair loss.

A man developed a rare cancer on his scalp after a hair transplant possibly due to sun damage, laser effects, and inflammation.

Finasteride treats hair loss but may affect prostate cancer detection.

Long-pulsed ruby lasers effectively reduce hair for up to 2 years with minimal pain.

Gamma rays did not change hair follicle density but increased white and hypopigmented hairs in mice.

Certain cells around hair follicles help improve skin regeneration for potential use in skin grafts.

Male hair loss is caused by inactive hair follicle stem cells.

Examining scalp biopsies in different ways helps better diagnose hair loss types.

The review suggests limited treatments for common hair loss conditions, with potential for future improvements.

Gray hair can potentially be reversed, leading to new treatments.