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Human hair varies widely and should be classified by curl type rather than race.

Different populations have distinct hair structures related to their ancestry.

The HIF-2α/ARNT complex is important for hair follicle development by controlling cell growth.

Red deer antler extract helps hair grow by extending the growth phase and increasing cell growth in hair follicles.

Cosmetic hair treatments can increase hair testosterone levels, while natural hair color does not affect it.

The hair treatment made hair grow faster and thicker and strengthened the hair roots.

Human hair contains many different molecules that change along its length, influenced by personal care products.

Lipids are important for healthy hair, but their exact role is not fully understood and needs more research.

Cattle hair isotope analysis can reveal diet and farm system characteristics.

Pectin biosynthesis is essential for the growth of cotton fibers and Arabidopsis root hairs.

Scalp cooling can reduce chemotherapy-induced hair loss and should be available in all hospitals.

Menopause-related hormonal changes affect hair but are not the only cause of hair changes in middle-aged women.

The article concludes that developing in vitro models for human hair structures is important for research and reducing animal testing, but there are challenges like obtaining suitable samples and the models' limitations.

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

Finasteride reverses early hair loss and promotes growth.

Human hair grows better in a special gel that mimics skin.

Certain polymers can stick to hair and increase volume, working best at a pH of 7 to 9.

Good-looking donor sites for hair transplants usually have higher hair density and thicker hair.

Pequi and buriti oils improve curly hair's gloss and strength.

New technologies like AI, robotics, and stem cells have made hair transplants more effective and natural-looking.

Consumers prefer general hair care products over those specifically for hair loss.

Segmental hair analysis can track testosterone over time but needs adjustments for sex, hair color, and washing frequency.

Hair analysis can somewhat track past testosterone levels but is influenced by factors like hair washing, growth rate, sex, and hair color.

Cells from balding scalps have more androgen receptors than cells from non-balding scalps.

Researchers found that hair shedding happens mostly when new hair is growing and involves a unique process.

Human hair follicles produce and respond to erythropoietin, helping protect against stress.

Keratin fibrils in hair form and stop growing at specific points in the follicle.

Apple-derived procyanidin B-2 can safely promote hair growth in men.

Oral zinc sulphate reduces dark hair color in mice.

NF-κB is crucial for different stages and types of hair growth in mice.