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Human skin produces sex hormones like estrogen and testosterone, influenced by ARO and StAR, which may affect skin elasticity and hair growth.

Minoxidil decreases LH expression, while hydralazine has mixed effects on prolyl and lysyl hydroxylase activities.

Human hair follicles switch between active and resting phases unpredictably.

Type 3 5α-reductase is more common and finasteride and dutasteride strongly inhibit it.

Human Schwann cells can be quickly made from hair follicle stem cells for nerve repair.

Scientists recreated human hair follicles in the lab that can grow hair.

Lipophilic dyes accumulate more in hair follicles when delivered with surfactant-propylene glycol solutions.

LED light therapy may help hair growth by activating certain cell pathways.

TGF-β2 plays a key role in human hair growth and development.

Hair treatments like bleaching increase friction by exposing tiny pores on the hair surface.

Researchers found a way to create cells from stem cells that act like human cells important for hair growth and could be used for hair regeneration treatments.

A certain surfactant sticks to human hair, making it change from water-repelling to water-attracting, which could help in hair conditioning.

Human hair contains various lipids that vary among individuals and help protect the hair.

Cysteine helps maintain keratin production in skin cells even when iron is low.

Fetal cells could improve skin repair with minimal scarring and are a potential ready-to-use solution for tissue engineering.

Scientists created hair-growing skin models from stem cells, which could help treat hair loss and skin diseases.

Different lab conditions and light treatment methods change how human skin cells respond to light therapy.

Human alpha defensin 5 helps heal wounds, reduce bacteria, and grow hair on burned skin.

Human hair follicles contain a complex network of prostanoid receptors that may influence hair growth.

A tripeptide-copper complex may help hair grow by increasing cell growth and decreasing cell death.

Human platelets change minoxidil to minoxidil sulfate, helping blood vessels widen.

The document concludes that understanding hair follicle cell cycles is crucial for hair growth and alopecia research, and recommends specific techniques and future research directions.

Human leukocytes and beard hair follicle cells have internal daily clocks, and PER1 and PER3 genes may indicate individual circadian rhythms.

Hair proteins have weak spots in their α-helical segments.

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

Human hair has a protective lipid layer that can be damaged by moisture and treatments, affecting hair growth and health.

Cells from a skin condition can create new hair follicles and similar growths in mice, and a specific treatment can reduce these effects.

Certain HLA class II alleles increase or decrease the risk of alopecia areata.

Mice are useful for researching human hair loss and testing treatments, despite some differences between species.

The review concluded that keeping the hair-growing ability of human dermal papilla cells is key for hair development and growth.