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Synthetic polypeptides in cosmetics may help with anti-aging, but their effectiveness on real skin is uncertain.

3D bioprinting is advancing in plastic and reconstructive surgery, especially for creating tissues and improving surgical planning, but faces challenges like vascularization and material development.

Bioprinting could greatly improve health outcomes but faces challenges like material choice and ensuring long-term survival of printed tissues.

Esthetic surgery complications can include infections, nerve injury, and more; proper evaluation and technique help prevent them.

Removing the ATR gene in adult mice causes rapid aging and stem cell loss.

Dehydroepiandrosterone (DHEA) is a prohormone important for producing sex steroids and has potential health benefits.

Testosterone therapy in transgender men has both desired effects like increased muscle mass and potential health risks such as higher cardiovascular risk.

Asia has made significant progress in tissue engineering and regenerative medicine, but wider clinical use requires more development.

Skin-derived precursors in hair follicles come from different origins but function similarly.

Androgen receptors are key for development and health, affecting conditions like prostate cancer and male pattern baldness.

Graft-versus-host disease is a complication where donor immune cells attack the recipient's body, often affecting the skin, liver, and gastrointestinal tract.

Androgens play a complex role in skin conditions like acne and hair loss in women, and normal blood levels don't always show true androgen status.

Thyroid hormone affects skin health, with too little causing rough, pale skin and too much leading to smooth, thin skin, and may also impact wound healing and skin conditions.

Thyroid hormones affect skin texture, hair and nail growth, and can cause skin diseases related to thyroid problems.

The oral contraceptive ethinylestradiol/chlormadinone acetate is effective in reducing acne and improving other skin conditions related to high androgen levels.

DNA phenotyping helps predict physical traits from DNA with varying accuracy and requires careful ethical and legal handling.

Male pattern baldness is an unintended side effect of the body's use of androgens for muscle growth, especially in those genetically prone to it.

Cantu syndrome, which causes excessive hair growth and skin issues, is due to a mutation in the ABCC9 gene, and understanding this could help develop new treatments for hair diseases.

The hairline lowering surgery with bone tunneling suture fixation is safe and effective, with high patient satisfaction.

Activating TLR3 may help produce retinoic acid, important for tissue regeneration.

Scalp tourniquets did not significantly prevent hair loss from chemotherapy.

D-OCT shows increased blood vessel growth in response to tissue damage in Frontal Fibrosing Alopecia and is useful for diagnosis and monitoring.

Different human traits like skin color and hair type vary between populations due to genetic adaptations to the environment.

Vitamin D is important for skin health and can help treat and prevent various skin conditions.

The case shows how hard it is to tell apart Multiple Autoimmune Syndrome from other similar autoimmune conditions, but correct diagnosis is key for treatment to work.

Lasers are less favored for hair transplant surgery but show promise for hair growth in controlled trials.

Hormones, especially testosterone and DHT, are key for penis development and function, and testosterone therapy may help with erectile dysfunction in those with low levels.

Men and women experience skin aging differently due to changes in sex hormone levels with age.

KGS1 tablets improved skin and hair health.

The book explains the science of tissue repair and regeneration, its medical uses, challenges, and ethical concerns.