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The Hair Diameter Index (HDI) was created to help plan hair restoration surgery after finding that visual hair density is linked to hair count and thickness, not volume.

Hair thickness decreases from the upper to lower areas of the back of the head, affecting hair transplant results.

TrichoScan helps identify subtle hair thinning in women with androgenetic alopecia.

Women generally want more hair volume, which becomes a concern around menopause due to hair loss.

The photographic method for measuring facial hair density is reliable and valid but needs further testing on different hair densities and skin colors.

Vitamin A deficiency changes cattle hair structure, while pregnancy may improve it, suggesting hair can indicate cattle health.

The oral contraceptive alone is the preferred treatment for hirsutism, as adding the GnRH analog showed no significant benefit.

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

Parietal scalp area has lower hair density and smaller hair diameter in women with hair loss.

Hair loss caused by longer latent hair cycle and sudden miniaturization, not gradual follicle size reduction.

Hair loss caused by longer latent hair cycle and sudden miniaturization, not gradual follicle size reduction.

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.

Hair thickness matters more than density for baldness in Japanese men over 25.

Older age and certain lifestyles are linked to thinner, weaker hair, while how you see your hair relates to its thickness.

Arab hair is generally thicker but less dense compared to other ethnicities, affecting hair disorder diagnosis and treatment.

Trichoscopy is a quick, non-invasive way to measure hair density and thickness, helping diagnose hair loss.

DSC cell injections significantly improved hair density and diameter, showing potential as a hair loss treatment.

Rice Bran Supercritical CO2 Extract significantly increased hair density and diameter in male alopecia patients without any side effects.

Hair diameter diversity is a key sign for diagnosing and managing male pattern baldness.

Conflicting findings in androgenic alopecia are likely due to biopsy location, hair diameter diversity, and hair follicle miniaturization.

The document concludes that using a phototrichogram with a protractor and tapeline is a reliable and noninvasive way to measure hair loss.

Low-dose acitretin helps nail psoriasis, stem cells may treat scarring alopecia, Chinese men have lower baldness rates, lateral foldplasty is good for ingrown toenails, hair diameter helps diagnose female baldness, childhood trauma linked to alopecia areata, certain hair-weaving leads to scalp conditions in African American women, and new methods for hair research and understanding hair and sweat gland development were introduced.

Effective hair loss assessment requires a mix of precise measurement methods.

TrichoScan is a reliable method for measuring hair growth and is useful for assessing hair loss treatments.

PRP injections increase hair density and diameter in female androgenetic alopecia patients.

Aging makes hair thinner and rougher, with less clear edges.

Chemotherapy can cause significant hair thinning and changes in hair texture, while tamoxifen has a smaller effect.

Women's hair grows faster and thicker than men's, but hair growth slows for both genders with pattern hair loss.

Hair's structure and properties change with pH; acidic pH maintains strength and less swelling, while alkaline pH increases water content and swelling.