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Human skin can make serotonin and melatonin.

Future hair loss treatments should aim to extend hair growth, reactivate resting follicles, reverse shrinkage, and possibly create new follicles, with gene therapy showing promise.

AGA causes hair loss by shrinking hair follicles due to DHT binding, and can be treated with finasteride and minoxidil.

The document provides a method to classify human hair growth stages using a model with human scalp on mice, aiming to standardize hair research.

Lecithin organogels could be good for applying drugs to the skin because they are stable, safe, and can improve drug absorption.

Some herbal therapies may help with skin conditions, but more research is needed to confirm their safety and effectiveness.

Cancer treatments targeting specific cells and the immune system can cause skin, mouth, hair, and nail problems, affecting patients' quality of life and treatment adherence.

Vitamin D and its receptor regulate skin functions like cell growth, immunity, hair cycle, and tumor prevention.

Estrogen therapy can reduce skin aging but has cancer risks.

Pregnancy can cause skin darkening, varicose veins, more sweating, hair growth, hair loss after birth, nail changes, and gum inflammation.

Microneedles improve drug delivery in various body parts, are safe and painless, and show promise in cosmetology, vaccination, insulin delivery, and other medical applications.

Vitamin D is important for skin health and may affect conditions like psoriasis and hair loss, but more research is needed to understand its role fully.

Some vitamins and minerals like vitamin D and iron can help with certain types of hair loss, but more research is needed for others.

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

Stress can cause hair loss by negatively affecting hair follicles and this effect might be reversed with specific treatments.

The document concludes that while significant progress has been made in understanding skin biology and stem cells, more research is needed to fully understand their interactions with their environment.

Stress increases nerve fibers and immune cell activity in mouse skin, possibly worsening skin conditions.

Minoxidil is the only FDA-approved topical drug for treating male or female pattern hair loss, and other medications like finasteride and dutasteride can also increase hair growth.

Dihydrotestosterone gel improved well-being and sexual function in older men without negatively affecting prostate health.

Melatonin helps regulate hair growth and protects the hair follicle from stress.

Nerves and chemicals in the body can affect hair growth and loss.

Growth factors and cytokines are important for hair growth and could potentially treat hair loss, but more research is needed to overcome challenges before they can be used in treatments.

The document concludes that certain genetic mutations and dietary factors are involved in acne development, and treatments like isotretinoin and diet changes can help manage it.

The p75 neurotrophin receptor is important for hair follicle regression by controlling cell death.

BMP2 and BMP7 have opposite roles in feather formation.

Alpha-hydroxy acids, like glycolic acid, safely improve skin issues and work on all skin types.

Mouse skin can produce and process serotonin, with variations depending on hair cycle, body location, and mouse strain.

Fat cells are important for healthy skin, hair growth, and healing, and changes in these cells can affect skin conditions and aging.

Costunolide may have multiple health benefits, including promoting hair growth and protecting against cancer and diabetes, but more research is needed.

Targeting the skin's endocannabinoid system could help treat skin disorders.