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Low doses of some substances can be beneficial, while high doses can be harmful or toxic.

Cancer rates are increasing in developed countries, with estrogen, aging, low vitamin D3, and HPV infection as common causes.

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.

Melatonin may reduce skin damage caused by X-rays in rats.

Asian hair is generally straight and thick, with unique disorders and properties, and more research is needed to understand it fully.

The document concludes that hormonal biomarkers are key for diagnosing hyperandrogenemia in women and hypogonadism in men.

The study found new details about human hair growth and suggests that preventing a specific biological pathway could potentially treat hair graying.

Low-dose radiation affects hair stem cell function and survival by changing their genetic material's structure.

Prostate cancer patients need early psychological and sexual support during radiotherapy to improve their quality of life.

Platelet-derived products help regenerate tissue and are used in various skin and hair treatments.

A3B5 can reduce skin pigmentation and slow melanoma growth.

Infrared radiation can cause skin aging and cancer at high temperatures but may have therapeutic benefits at controlled levels.

Acyzol could help treat conditions caused by zinc deficiency.

The HPV type 11 region activates hair-specific gene expression in mice.

Wnt signaling is crucial for skin development and hair growth.

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

The document summarizes medical findings on topics like heart rhythm treatment, sleep apnea therapy, and various health conditions and treatments.

Too much Smad7 changes skin and hair development by breaking down a protein called β-catenin, leading to more oil glands and fewer hair follicles.

Smad-4 and Smad-7 are key in hair follicle development, with other Smads being less important.

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

The document explains that hirsutism, often caused by hormonal issues, can be managed with treatment to improve both physical appearance and mental health.

The skin has multiple layers and cells, serves as a protective barrier, helps regulate temperature, enables sensation, affects appearance, and is involved in vitamin D synthesis.

The document tests knowledge and decision-making in hematology through multiple-choice questions.

The document provides 70 multiple choice questions to improve haematology skills.

Lgr5 is a marker for active, self-renewing stem cells in the intestine and skin, important for tissue maintenance.

Melanocyte stem cells in hair follicles are key for hair color and could help treat greying and pigment disorders.

Olive oil compounds may help prevent cancer in animals, but human results are mixed.

A certain smell receptor in hair follicles can affect hair growth when activated by a synthetic sandalwood scent.

The TGF-β family helps control how cells change and move, affecting skin, hair, and organ development.

Human skin cells produce proenkephalin, which changes with environmental factors and skin diseases.