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Progesterone byproduct 5αP stimulates mammary tumor growth, but finasteride can suppress it.

Men taking 5-alpha-reductase inhibitors before or after bladder cancer diagnosis had a lower risk of dying from the disease.

Different oil products cause varying levels of skin irritation in mice, which could potentially lead to tumors.

The document suggests that blocking sweat glands with antiperspirants might allow skin-generated hormones to be absorbed, possibly increasing breast and prostate cancer risk.

Finasteride does not prevent bladder cancer.

Understanding hair biology is key to developing better treatments for hair and scalp issues.

Nanotechnology is improving drug delivery and targeting, with promising applications in cancer treatment, gene therapy, and cosmetics, but challenges remain in ensuring precise delivery and safety.

Intense pulsed light treatment effectively reduces underarm hair by making hair follicles smaller and extending their resting phase.

These methods help understand DNA changes in mouse skin.

Removing integrin α3β1 from hair stem cells lowers skin tumor growth by affecting CCN2 protein levels.

Long-pulsed ruby lasers effectively reduce hair for up to 2 years with minimal pain.

Phaeodactylum tricornutum extract helps hair follicle cells grow by activating the ERK1/2 pathway.

Coffee and tea might help hair growth in balding individuals, but side effects and alternative uses are being considered.

Lipase H is important for hair follicle function and shaping hair fibers.

Heavy metals like arsenic, cadmium, and lead can increase cancer risk and worsen outcomes.

The exact identity of skin stem cells and how skin cells differentiate is not fully known.

Retinoids are effective for skin conditions like severe acne and psoriasis but must be used with caution due to potential side effects and risks during pregnancy.

The secretions of mesenchymal stem cells could be used for healing without using the cells themselves.

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

Melatonin is important for skin health and protection, and can be made by the skin or applied to it.

Male and female skin differ in many ways, which could lead to gender-specific skin treatments.

Visible light can damage skin and most sunscreens don't block it well; more research is needed on its effects and protection methods.

A new microneedle patch made from hair proteins helps regrow hair faster and better than current treatments.

Caffeine in cosmetics may reduce cellulite, protect skin, and stimulate hair growth, but more research is needed on its use and effects.

The skin's internal clock affects healing, cancer risk, aging, immunity, and hair growth, and disruptions can harm skin health.

Macrophages help regrow hair by activating stem cells using AKT/β-catenin and TNF.

Hair elemental analysis could be useful for health and exposure assessment but requires more standardization and research.

A WNT10A gene mutation leads to ectodermal dysplasia by disrupting cell growth and differentiation.

Antioxidants can benefit skin health but should be used carefully to avoid negative effects.

The conclusion is that tissue structure is key for stem cell communication and maintaining healthy tissues.