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    Glossary Hair Shape

    physical form of individual hair strands

    Hair shape refers to the physical form or structure of individual hair strands, which can be straight, wavy, curly, or coily. This shape is primarily determined by the shape of the hair follicle and the distribution of keratin proteins within the hair shaft. For example, round follicles typically produce straight hair, while oval or asymmetrical follicles result in wavy or curly hair.

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    1. Dermal papilla cell number specifies hair size, shape and cycling and its reduction causes follicular decline Development · 2013 · 211 citations
    2. Hair shape of curly hair Journal of the American Academy of Dermatology · 2003 · 78 citations
    3. Human Hair and the Impact of Cosmetic Procedures: A Review on Cleansing and Shape-Modulating Cosmetics Cosmetics · 2016 · 53 citations
    4. Runx3 is involved in hair shape determination Developmental dynamics · 2005 · 34 citations
    5. The biology of hair shape International Journal of Dermatology · 2005 · 26 citations
    6. Changing human hair fibre colour and shape from the follicle Journal of Advanced Research · 2023 · 5 citations
    7. Investigating the Relationship Between Androgenetic Alopecia and Hair Shape, Color, and Thickness: A Case‐Control Study Health Science Reports · 2025
    8. 764 DNA dioxygenases Tet1/2/3 control hair matrix keratinocyte differentiation and hair shaft shape via regulation of hair keratin gene expression 2020
    9. Sequencing KRT71 as a candidate gene for hair shape variation in dromedary camels Kuwait Journal of Science · 2025
    10. The substantial role of asymmetric hair follicle differentiation in determining hair shape with ethical/racial related diversity Journal of Dermatological Science · 2017
    11. Letters to the Editors: Re: Help Hair Protein Shake Hair transplant forum international · 2013
    12. Psychiatric shades of grey: mirtazapine-induced hair discoloration and hair loss Irish journal of psychological medicine · 2016 · 2 citations
    13. Shape Variability and Classification of Human Hair: A Worldwide Approach Human biology · 2007 · 95 citations
    14. Changing the shape of hair with keratin peptides RSC Advances · 2017 · 47 citations
    15. Quantifying variation in human scalp hair fiber shape and pigmentation American Journal of Physical Anthropology · 2016 · 32 citations
    16. Quantifying hair shape and hair damage induced during reshaping of hair. PubMed · 2016 · 11 citations
    17. Faculty Opinions recommendation of Local positive feedback regulation determines cell shape in root hair cells. Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature · 2008
    18. Gut Microbiota Shapes the Effects of Saturated and Polyunsaturated Fatty Acids on Skin and Hair Follicle Homeostasis Journal of Investigative Dermatology · 2026
    19. 10-Year-Old Female with an Irregularly Shaped Patch of Hair Loss Clinical Cases in Dermatology · 2022
    20. Local Positive Feedback Regulation Determines Cell Shape in Root Hair Cells Science · 2008 · 512 citations
    21. Achieving Well-Aligned Wavy Hair by Controlling Individual Fiber Shape Journal of Society of Cosmetic Chemists of Japan · 2023
    22. Synthesis of a new amino acid derivative with long‐lasting hair shape control effects and elucidation of its mechanisms International Journal of Cosmetic Science · 2025
    23. Mechanism research of yak hair stretching slenderization based on the changes of conformation and cell shape 2009
    24. Protein-phosphatase inhibitors block root hair growth and alter cortical cell shape of Arabidopsis roots Planta · 1994 · 61 citations
    25. Bidirectional binding property of high glycine–tyrosine keratin-associated protein contributes to the mechanical strength and shape of hair Journal of structural biology · 2013 · 46 citations
    26. A genome-wide association scan in admixed Latin Americans identifies loci influencing facial and scalp hair features Nature Communications · 2016 · 196 citations
    27. Human hair form. Morphology revealed by light and scanning electron microscopy and computer aided three-dimensional reconstruction. PubMed · 1988 · 27 citations
    28. African hair morphology: macrostructure to ultrastructure International Journal of Dermatology · 2005 · 17 citations
    29. Unique Hair Properties that Emerge from Combinations of Multiple Races Cosmetics · 2019 · 10 citations
    30. How different is human hair? A critical appraisal of the reported differences in global hair fibre characteristics and properties towards defining a more relevant framework for hair type classification International Journal of Cosmetic Science · 2022 · 8 citations