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COVID-19 vaccines are linked to menstrual changes in many women.

Drinking alcohol 1-2 times a week may reduce urinary symptoms, but drinking more often might increase the risk.

The guideline recommends mental health involvement in diagnosing gender identity disorder and outlines hormone and surgical treatment protocols, emphasizing safety, informed consent, and long-term monitoring.

Human hair, despite its different types, shares common traits that affect its structure and response to treatments.

Trichohyalin is modified by enzymes to form strong structures in hair cells.

Most youth with gender dysphoria received hormones, had minor complications, and showed a decrease in suicide attempts after treatment.

Trichohyalin makes hair follicles stronger.

Small proline-rich proteins and trichohyalin help make epithelial tissues tougher and more flexible.

Curly hair shape is due to uneven growth patterns in the hair follicle.

Human hair becomes weaker and stretches more easily at higher temperatures.

Keratinization in embryos helped vertebrates adapt to land by forming a protective skin barrier.

Moisture content significantly affects how human hair breaks.

Keratin fibrils in hair form and stop growing at specific points in the follicle.

Hard α-keratins stay stiff in water because the surrounding matrix keeps them dehydrated and strong.

Hair and nail proteins, mainly keratins, are crucial for structure and can indicate health issues.

Cuticle damage doesn't affect hair's tensile strength; the cortex is responsible for it.

A new sheep gene, KRTAP36-1, may help breed sheep with better wool by reducing prickle factor.

In Japan, sex reassignment surgery for gender identity disorder faces challenges and needs better medical support and education.

The document concludes that non-operative treatment for gender dysphoria is safe and effective, and hormone therapy does not increase cancer risk.

Transgender women can still get testicular cancer, so proper screening is important.

Human hair varies widely and should be classified by curl type rather than race.

Dr. Shoji Okuda's pioneering work on hair transplantation was overlooked and could have significantly advanced the field if recognized sooner.

Different hair types from various ethnic groups affect hair shine due to characteristics like thickness and shape.

Dirty dots are a common scalp finding in elderly women and can be washed away with shampoo.

Doctors need to understand statistics to properly evaluate clinical trials for patient care.

Hair fiber shape and curvature are not significantly linked when ancestry is considered.

A gentler, less damaging method for curling hair using tyrosine works well initially but fades after washing.

The document concludes that hair keratin-chitosan scaffolds were successfully made and are suitable for biomedical use.

Quantifying hair shape is better than using racial categories for understanding hair characteristics.

The method accurately measures hair damage and strength, revealing effects of cosmetics and metal correlations.