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Redheaded people have higher levels of a vitamin D precursor, suggesting red hair may be an adaptation for better vitamin D synthesis in areas with less sunlight.

Nanoparticles improve drug delivery through the skin but more research is needed on their long-term effects and skin penetration challenges.

Prolactin contributes to hair loss by promoting hair follicle shrinkage and cell death.

Hair follicles produce and respond to melatonin, affecting hair growth and sensitivity to estrogen.

The document concludes that assessing hair follicle damage due to cyclophosphamide in mice involves analyzing structural changes and suggests a scoring system for standardized evaluation.

Stress hormone corticosterone blocks a growth factor to slow down hair stem cell activity and hair growth.

mTOR signaling helps activate hair stem cells by balancing out the suppression caused by BMP during hair growth.

Blue light promotes hair growth by interacting with specific receptors in hair follicles.

Prolactin affects the production of different keratins in human hair, which could lead to new treatments for skin and hair disorders.

Squalene-based carriers improve delivery of a treatment to hair follicles for alopecia areata.

Glutamine metabolism affects hair stem cell maintenance and their ability to change back to stem cells.

Red Ginseng Extract may help human hair grow by activating growth pathways and blocking negative effects of certain hormones.

Injecting a special gel with human protein particles can help hair grow.

Androgen hormones cause hair follicle scarring in hair loss, and finasteride helps reduce it.

Some plants may help with hair growth and have fewer side effects than synthetic drugs, but more research is needed to confirm their effectiveness.

Geranium sibiricum extract helps hair grow and is more effective than minoxidil but can be toxic in high concentrations.

Testosterone can slow down hair growth when combined with certain cells from bald scalps, and this effect can be blocked by an androgen receptor blocker.

Scutellaria baicalensis extract and baicalin may help prevent hair loss.

Finasteride significantly reduces hair growth in women with idiopathic hirsutism.

17α-estradiol is a safe estrogen that might protect the brain and doesn't cause feminization, needing more research for treating brain diseases.

DHT stops hair regrowth in mice, similar to human hair loss.

Nanotechnology improves minoxidil treatment for hair loss.

Obese and non-obese women with PCOS have higher heart risk markers, especially if they are obese.

Researchers found a good way to isolate hair follicle stem cells from newborn goats for further study.

Immune checkpoint inhibitors can cause skin issues but are linked to better cancer outcomes.

The conclusion is that teeth, hair, and claws have similar stem cell niches, which are important for growth and repair, and more research is needed on their regulation and potential markers.

The study concluded that androstendione and DHEA are important for diagnosing high male hormone levels in women with excessive hair growth.

Scaffold improves hair growth potential.

Caspase-7 has functions in skin and hair that are not related to cell death.

Impaired autophagy may cause hair loss by triggering early catagen.