February 2026 in “International Journal of Molecular Sciences” PDLLA filler can improve hair thickness and shine by reducing age-related hair decline.
February 2026 in “MDPI (MDPI AG)” Exosome-based treatments may improve skin and hair issues, but more research is needed for safety and effectiveness.
January 2026 in “Materialia” Porcine ADM scaffold helps hair growth in mice.
December 2025 in “Aesthetic Surgery Journal” Exosomes are promising tools in aesthetic medicine for skin and hair regeneration.
July 2025 in “Bioactive Materials” New engineering methods show promise for regenerating hair follicles using stem cells and advanced technologies.
April 2025 in “Pharmaceuticals” APA is a promising new compound for repairing damaged hair, outperforming Olaplex® in strength and elasticity.
December 2024 in “Journal of Cutaneous and Aesthetic Surgery” Advanced FUE systems have evolved to improve precision and efficiency in hair transplantation.
Transplanted rat hair follicles grew hair and had increased but not fully restored nerve connections in mice.
July 2023 in “Bioengineering & translational medicine” Mesenchymal stem cell proteins in a special gel improved healing of severe burns.
June 2022 in “Authorea (Authorea)” Efficient delivery systems are needed for the clinical use of CRISPR-Cas9 gene editing.
September 2012 in “Hair transplant forum international” The document concludes with the creation of a Hair Transplant Foundation after reviewing the early hair transplant techniques and discussions from a forum.
34 citations
,
August 2002 in “British Journal of Dermatology” ALA-PDT is effective and safe for chronic X-ray dermatitis, providing complete or partial remission.
4 citations
,
January 2021 in “Skin appendage disorders” Hair straightening can damage hair and pose health risks, including exposure to carcinogens and hair loss.
1 citations
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January 2010 in “Han-guk hyeonmigyeong hakoeji/Applied microscopy” Straight permed hair loses weight faster than virgin hair when heated, but ends up heavier after burning.
2 citations
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January 2018 in “European journal of pediatric surgery reports” 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.
December 2022 in “European journal of internal medicine” Hair straightening treatments can cause serious kidney damage, especially if you have skin issues.
September 2020 in “Fertility and sterility” Hyperandrogenism does not affect the quality of blastocysts in PCOS patients undergoing IVF.
36 citations
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September 2015 in “Forensic Science International: Genetics” Certain DNA variants can predict straight hair in Europeans but are not highly specific.
13 citations
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February 2019 in “Zoology” Lustre mutant sheep have normal hair structure and proteins but differ in felting properties.
3 citations
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October 2024 in “Animals” Crimped wool has proteins linked to crimp formation, while straight wool has proteins linked to fiber fineness, which can improve wool quality and value.
3 citations
,
October 1990 in “Journal of the American Academy of Dermatology” Mechanical trauma like towel drying can cause knotted hair even in straight hair.
234 citations
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November 2009 in “American journal of human genetics” Common variants in the Trichohyalin gene are linked to straight hair in Europeans.
April 2020 in “International Journal of Cosmetic Science” The study found that minor protein differences between curved and straight Japanese hair are unlikely to significantly affect hair structure.
27 citations
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September 1988 in “PubMed” Hair follicle shape determines hair type: curly, straight, or in-between.
11 citations
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December 2016 in “Frontiers in Psychology” Hair style affects perceptions of age, health, and attractiveness more than hair color does.
May 2023 in “Accounts of chemical research” New methods can better classify curly hair types and lead to improved hair care products.
January 2016 in “Belarusian State Pedagogical University repository (Belarusian State Pedagogical University)” A 6-group geometric classification of human scalp hair is more reliable and objective for testing than an 8-group system.
April 2025 in “Scholars International Journal of Anatomy and Physiology” Straight-lined hairlines are most common among Etche people.
39 citations
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April 2020 in “Clinical, Cosmetic and Investigational Dermatology” Asian hair is generally straight and thick, with unique disorders and properties, and more research is needed to understand it fully.
8 citations
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July 2019 in “The journal of investigative dermatology/Journal of investigative dermatology” Curly hair is mechanically different from straight hair and may need new testing methods.