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Hair greying is linked to reduced ATM protein in hair cells, which protects against stress and damage.

Nicotinamide applied to the scalp can slow down hair growth.

Chemotherapy causes hair loss by damaging hair follicles and stem cells, with more research needed for prevention and treatment.

Autophagy, a cell recycling process, is crucial for prolonged hair growth and could be a potential target for treating hair growth disorders.

Ionizing radiation damages human hair follicles by stopping cell growth, causing cell death, disrupting color, and increasing stress and damage markers.

All-trans retinoic acid causes hair loss by increasing TGF-β2 in hair follicle cells.

Hedgehog signaling helps keep hair follicle stem cells the same in both young and old human skin.

Leontopodium alpinum extract may help reduce hair shedding by keeping hair in the growth phase longer.

TRH stimulates human hair growth and extends the hair growth phase.

Chemotherapy causes complex changes in hair follicle cells that can lead to hair loss.

Activating a bitter taste receptor in hair follicles can stop hair growth by increasing a specific growth factor.

MPZL3 is important for controlling the hair growth cycle in mice and humans.

Estrogen and its receptors play a key role in hair growth, with differences between males and females.

Androgens can both increase and decrease hair growth in different parts of the body.

Scalp hair follicle culture has limits for testing minoxidil's hair growth effects.

The effects of estrogen on human hair growth are unclear and need more research.

Dopamine stops hair growth and pigment production in human scalp hair follicles.

PGD2 stops hair growth and is higher in bald men with AGA.

The proteins transthyretin and megalin are more present in the growth phase of hair, suggesting they might affect hair health and growth.

Cyclosporine A may help treat hair loss by blocking a protein that inhibits hair growth.

Melatonin may protect hair follicle cells from damage caused by a chemotherapy drug.

The conclusion is that we need more effective hair loss treatments than the current ones, and these could include new drugs, gene and stem cell therapy, hormones, and scalp cooling, but they all need thorough safety testing.

Hair follicles on the scalp interact with and respond to the nervous system, influencing their own behavior and growth.

Human scalp hair follicles can be used to study how prolactin affects hair growth and cell death.

Scalp cooling to prevent hair loss from chemotherapy works for some but not all, and studying hair damage markers could improve prevention and treatment.

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

ALRN-6924 may prevent hair loss caused by chemotherapy.

Certain hairstyles can cause scalp diseases, smoking is linked to hair loss, 5% minoxidil foam is effective for hair loss treatment, and various factors influence wound healing and hair growth.

The composition with carnitine, thioctic acid, and saw palmetto extract may effectively reduce inflammation in hair follicle cells.

Thyroid hormones help hair grow, reduce hair loss, and increase hair pigment.