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Human skin can make serotonin and melatonin, which help protect and maintain it.

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

The document concludes that the understanding of scar formation is incomplete and current prevention and treatment for hypertrophic scars and keloids are not fully effective.

The Endocrine Society advised against routine testosterone therapy for women, citing a need for more research on long-term safety and a clear definition of androgen deficiency.

The immune system plays a key role in tissue repair, affecting both healing quality and regenerative ability.

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

Patients need long-term care after bariatric surgery to manage potential nutritional and metabolic issues.

Creating stronger blockers for skin enzymes might lead to better treatment for conditions like acne and excessive hair growth.

Wnt signaling helps heal injuries and could lead to new treatments.

Stem cells are crucial for skin repair and new treatments for chronic wounds.

Stem cell niches are crucial for regulating stem cell renewal and differentiation, and understanding them can help in developing regenerative therapies.

Metformin helps manage polycystic ovary syndrome by improving insulin resistance and ovulation, but more research is needed on its full effects.

Sebocytes play a key role in controlling androgen levels in human skin.

Targeted cancer therapies often cause serious skin problems that need careful management.

Menopause can lead to skin and hair problems due to hormonal changes, but hormone replacement therapy might help slow these effects.

New effective scar treatments are urgently needed due to the current options' limited success.

Oestrogens are key for bone growth during puberty in both boys and girls.

Hormone treatments for transgender individuals generally improve mental health and physical transition, with some health risks that require medical supervision.

Hair follicle stem cells are key for hair and skin regeneration, can be reprogrammed, and have potential therapeutic uses, but also carry a risk of cancer.

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

Hair follicle patterns form through a mix of self-organization and signaling interactions.

Skin aging is due to impaired stem cell mobilization or fewer responsive stem cells.

The niche environment controls stem cell behavior and plasticity, which is important for tissue health and repair.

Estrogen replacement can improve skin health in menopausal women but doesn't reverse sun damage or prevent hair loss.

Different types of stem cells with unique roles exist in blood, skin, and intestines, and this variety is important for tissue repair.

Stem cells in the hair follicle are regulated by their surrounding environment, which is important for hair growth.

Normal skin cell renewal doesn't need RAR signaling, but vitamin A-related skin thickening does.

Finasteride effectively treats baldness but may cause sexual side effects.

Stem cell plasticity is crucial for wound healing but can also contribute to cancer development.

Estrogens help reduce skin aging, and SERMs might offer similar benefits without the risks of hormone therapy.