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Men with baldness due to androgenetic alopecia still have hair stem cells, but lack specific cells needed for hair growth.

Human hair is made up of different keratins, some strong and some weak, with specific types appearing at various stages of hair growth.

Common variants in the Trichohyalin gene are linked to straight hair in Europeans.

FPHL affects hair density and diameter, causing visible hair loss in older women.

Middle-aged women with chronic telogen effluvium experience increased hair shedding but usually don't get significantly thinner hair.

Activating the Sonic hedgehog gene in mice can start the hair growth phase.

Hair loss in women is genetic, diagnosed by examination and biopsy, and treated with minoxidil, finasteride, or transplantation.

The document concludes that understanding hair follicle biology can lead to better hair loss treatments.

The conclusion is that proper signaling is crucial for hair growth and development, and errors can lead to cancer or hair loss.

5% and 2% minoxidil solutions effectively promote hair growth and reduce hair loss, with 5% being slightly more effective but having more side effects.

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

Dutasteride more effective for hair growth, but has more side effects than finasteride.

Platelet-rich plasma injections significantly improved hair regrowth and thickness in patients with hair loss.

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

More dermal papilla cells in hair follicles lead to larger, healthier hair, while fewer cells cause hair thinning and loss.

Noggin is necessary to start the hair growth phase in skin after birth.

Mutations in the P2RY5 gene cause autosomal recessive woolly hair.

Oxidative stress causes hair to gray by damaging and killing pigment cells.

Hair color production in mice is closely linked to the hair growth phase and may also influence hair growth itself.

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

Certain cells from hair follicles can create new hair and contribute to hair growth when implanted in mice.

Skin needs dermal β-catenin activity for hair growth and skin cell multiplication.

Laser hair removal is the most requested cosmetic procedure and has become a scientifically-based treatment suitable for all skin types.

Iron deficiency may be related to hair loss, but there's not enough evidence to recommend iron screening or supplements for all hair loss patients.

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

Early diagnosis and treatment, using finasteride, minoxidil, or hair transplantation, improves hair loss outcomes.

Human hair, despite its different types, shares common traits that affect its structure and response to treatments.

Lactate production is important for activating hair growth stem cells.

Schizophrenia patients' stem cells show abnormal neuron development and mitochondrial issues.

Ruxolitinib effectively regrows hair in most patients with severe hair loss.