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Hair in mammals likely evolved from glandular structures, not scales.

The normal range for the hair pull test is 2 hairs or fewer, and washing or brushing hair before the test does not affect the results.

Thai people's hair density decreases with age and varies by scalp area, but hair thickness stays the same regardless of age or scalp area.

As people age, their hair follicles produce less pigment, leading to gray and white hair, due to factors like reduced enzyme activity and damage to melanocyte DNA.

The document concludes that understanding the genes and pathways involved in hair growth is crucial for developing treatments for hair diseases.

Proper hair care can prevent and stop hair breakage in people with acquired trichorrhexis nodosa.

Early hair loss in men and women may indicate a higher risk of heart disease and metabolic problems.

Bleaching damages hair by reducing the quality of keratin and keratin-associated proteins.

Proper planning for hair transplants is crucial for natural results, with careful patient selection and strategic graft placement being key factors.

Scientists made nanoparticles from human hair proteins to improve drug delivery.

Red light therapy is safe and effectively increases hair growth in women with hair loss.

Hormones and their receptors, especially androgens, play a key role in hair growth and disorders like baldness.

Testosterone and dihydrotestosterone affect hair growth, and new techniques like the folliculogram help study it, but fully understanding hair growth is still complex.

The article concludes that advancements in hair cosmetics require dermatologists to stay informed about products and their potential risks, including allergies and higher risks for hairdressers.

Herbs can potentially treat hair loss by inhibiting a key enzyme and promoting hair growth, and deficiencies in zinc, biotin, and iron are linked to hair loss.

New compounds were found to help increase hair growth and decrease hair loss.

FGF-2&D/P nanoparticles can help treat hair loss.

Hair restoration can sometimes result in unnatural-looking hair, wide scars, and poorly designed hairlines, but these issues can be corrected with careful planning, various techniques, and possibly medical therapy.

A specific laser treatment can promote hair growth in mice by increasing certain protein levels.

Minoxidil nanoparticles significantly boost hair growth in mice compared to regular minoxidil.

Microneedling helps with hair loss, especially with 5% minoxidil, but more high-quality research is needed.

Niosomes can effectively deliver Superoxide Dismutase to hair follicles, potentially helping prevent hair loss.

A baby girl's hair turned straight on one side due to a neck tumor and surgery, but it returned to curly as she recovered.

Women of color in Northern Manhattan view hair care as important to their identity and culture, and education on harmful chemicals in hair products is needed.

The document concludes that there are various surgical techniques for hair restoration, their success depends on the surgeon's skill, patient's health, and quality of donor hair, and they can potentially improve the mental well-being of those with hair loss.

Low fluence photoepilation temporarily removes hair by targeting the hair follicle's pigmented area without severe damage.

Human hair follicle organ culture is a useful model for hair research with potential for studying hair biology and testing treatments.

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

Hair color loss can indicate the effectiveness of a drug targeting the KIT protein in mice and humans.

UVB radiation harms hair growth and health, causing cell death and other changes in human hair follicles.