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Changing light periods synchronized wool growth cycles in sheep.

Trichotillomania is a chronic condition where people uncontrollably pull out their hair, often starting in childhood.

Sunlight damages hair, causing cuticle loss, protein changes, and discoloration.

The document concludes that understanding hair problems can lead to cost-effective solutions and proper treatment choices.

Polycystic ovaries are defined by having 12 or more small follicles in each ovary and are found in up to 33% of women, while Polycystic Ovary Syndrome (PCOS) is the most common hormone disorder in women of reproductive age, potentially increasing risk of obesity, diabetes, and heart diseases.

Both genes and environmental factors like chemicals may contribute to the increase in hypospadias, but the exact causes are still unclear.

Lichen planus pigmentosus causes dark skin patches and is treated by avoiding triggers and using anti-inflammatory medications.

We don't fully understand how sunlight damages different types of hair.

Targeting ornithine decarboxylase can help prevent skin cancer.

Systemic retinoids may effectively treat erosive pustular dermatosis of the scalp.

Some skin conditions look like acne but are caused by drugs, and they usually get better when the drug is stopped.

Better hair care products are needed to protect against grooming and chemical damage.

The document provides guidelines to standardize and improve laser hair removal practices.

Different species and human skin models vary in their skin enzyme activities, with pig skin and some models closely matching human skin, useful for safety assessments and understanding the skin's protective roles.

Men's hair loss is caused by hormones and genes, and can be treated with medication and surgery, while graying is due to aging and has no prevention except dyeing.

Researchers developed a model that shows hair follicles increase skin absorption of caffeine by 20%.

Facial dark spots can be caused by the sun, genetics, makeup, or medicine, and are diagnosed by patient history and skin tests.

Early adrenal gland maturation in young children can be normal, but other serious conditions should be ruled out first.

The long-pulsed alexandrite laser is effective for hair reduction, particularly for light-skinned individuals with dark hair, but caution is needed for darker skin.

Alopecia Areata is an autoimmune disease affecting hair follicles, influenced by genetic and environmental factors, with rodent models being essential for research.

Various potential triggers may be causing the rise in frontal fibrosing alopecia, and avoiding these could help stop the disease's increase.

Men with male pattern baldness have a higher risk of certain skin cancers, especially on the scalp.

A woman developed male traits from accidental contact with her husband's testosterone gel.

Microneedles can cause side effects like infection and allergic reactions, and precautions like test spots and sunscreen are recommended.

The vitamin D receptor helps regulate skin and hair health independently of its usual vitamin D ligand.

Vitamin D is important for skin health and can affect various skin diseases.

New treatments for skin conditions related to the sebaceous gland are being developed based on current research.

Measuring the distance from the anus to the clitoris may moderately help diagnose polycystic ovary syndrome, especially in certain cases.

Low vitamin D3 levels are significantly linked to hair loss, especially in female students.

Vitamin D is important for skin health, but more research is needed to understand its full effects and treatment potential.