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    Glossary Hair Diameter

    width of an individual hair strand, measured in micrometers

    Hair Diameter, also known as hair shaft diameter or hair thickness, refers to the width of an individual strand of hair. It is typically measured in micrometers (µm) and can vary significantly among individuals and even among different hairs on the same person. This measurement is important for understanding hair texture, strength, and overall health, and it can influence how hair responds to styling and treatment products.

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    1. HAIR DIAMETER IN FEMALE BALDNESS British Journal of Dermatology · 1972 · 63 citations
    2. What women want - quantifying the perception of hair amount: an analysis of hair diameter and density changes with age in caucasian women British Journal of Dermatology · 2012 · 61 citations
    3. Evaluation of Hair Density and Hair Diameter in the Adult Thai Population Using Quantitative Trichoscopic Analysis BioMed Research International · 2020 · 31 citations
    4. Contribution of hair density and hair diameter to the appearance and progression of androgenetic alopecia in Japanese men British Journal of Dermatology · 2014 · 21 citations
    5. Qualification of a new and precise automatic tool for the assessment of hair diameters in phototrichograms Skin Research and Technology · 2011 · 9 citations
    6. Hair diameter evaluation in different regions of the safe donor area in Asian populations International Journal of Dermatology · 2017 · 9 citations
    7. Hair diameter in systemic lupus erythematosus Lupus · 2006 · 6 citations
    8. Normal head-hair length is correlated with its diameter Clinical and Experimental Dermatology · 2004 · 4 citations
    9. Hair diameter measurements for planning follicular unit extraction surgery (FUE): Is there a correlation between the micrometer caliper and scanning electron microscopy (SEM) findings? Journal of Cosmetic Dermatology · 2021 · 3 citations
    10. Hair diameter measurement methods: micrometer caliper versus phototrichogram Archives of Aesthetic Plastic Surgery · 2023 · 2 citations
    11. Conflicting Reports Regarding the Histopathological Features of Androgenic Alopecia: Are Biopsy Location, Hair Diameter Diversity, and Relative Hair Follicle Miniaturization Partly to Blame? Clinical, Cosmetic and Investigational Dermatology · 2021 · 1 citations
    12. Hair density, hair diameter and the prevalence of female pattern hair loss British Journal of Dermatology · 2002 · 1 citations
    13. Hair density, hair diameter and the prevalence of female pattern hair loss: reply from authors British Journal of Dermatology · 2002
    14. Age, lifestyle and self‐perceptions of hair: Is there an association with hair diameter and tensile properties? International Journal of Cosmetic Science · 2019 · 2 citations
    15. The Effects of Lower vs Higher Cell Number of Platelet-Rich Plasma (PRP) on Hair Density and Diameter in Androgenetic Alopecia (AGA): A Randomized, Double-Blinded, Placebo, Parallel-Group Half-Scalp IRB-Approved Study. Aesthetic Surgery Journal · 2021 · 6 citations
    16. Hair Diameter Variation in Different Vertical Regions of the Occipital Safe Donor Area Archives of Plastic Surgery · 2017 · 10 citations
    17. Effect of platelets‐rich plasma on scalp hair diameter Journal of Cosmetic Dermatology · 2018 · 4 citations
    18. [Changes in telogen rate, hair density, hair diameter and rate of growth in androgenetic alopecia of the male. Simultaneously a contribution to the significance of dysplastic hair]. PubMed · 1986
    19. Hair density, hair diameter and the prevalence of female pattern hair loss British Journal of Dermatology · 2001 · 234 citations
    20. Hair diameter diversity: a clinical sign reflecting the follicle miniaturization. PubMed · 2001 · 41 citations
    21. Parietal scalp is another affected area in female pattern hair loss: an analysis of hair density and hair diameter Clinical, Cosmetic and Investigational Dermatology · 2017 · 30 citations
    22. Hair follicle characteristics as early marker of Type 2 Diabetes Medical Hypotheses · 2016 · 13 citations
    23. Diameter and Amino Acid Changes in Hair of Negro Children with Protein-Calorie Malnutrition. Experimental Biology and Medicine · 1966 · 11 citations
    24. Variation and Heritability in Hair Diameter and Curvature in an Australian Twin Sample Twin research and human genetics · 2016 · 5 citations
    25. The Development and Application of the Hair Diameter Index (HDI) Hair transplant forum international · 2021 · 3 citations
    26. Donor site of follicular unit excision hair transplantation: the relationship between appearance and actual hair density, and hair diameter Journal of Plastic Surgery and Hand Surgery · 2020 · 2 citations
    27. Evaluation of Scalp Hair Density and Diameter in the Arab Population: Clinical Office-Based Phototrichogram Analysis Clinical, cosmetic and investigational dermatology · 2022 · 1 citations
    28. Cast application of four weeks' duration significantly affects hair length, diameter and density Journal of dermatological treatment · 2013 · 1 citations
    29. Response to Park et al. on the Clinical Use of Hair Diameter Diversity in Androgenetic Alopecia Journal of the American Academy of Dermatology · 2026
    30. Serum ferritin and hair iron content in correlation to hair diameter and density: a case-control study Dermatology Reports · 2026