January 2026 in “Zenodo (CERN European Organization for Nuclear Research)” The study aims to see if maternal hair cortisol levels during pregnancy relate to adverse childhood experiences.
August 2023 in “Frontiers in Endocrinology” Mutations in mitochondrial DNA might significantly contribute to the development of Polycystic Ovarian Syndrome.
254 citations
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January 2007 in “Chemical Society Reviews” Hair is a complex protein fiber with unique properties useful for developing hair products.
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December 1979 in “Naunyn-schmiedebergs Archives of Pharmacology” These drugs raise prostaglandin-like material in dog blood, possibly causing blood vessel widening.
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September 1997 in “Dermatologic Surgery” Chest hair can be used for scalp hair transplants when there's not enough scalp hair.
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March 2025 in “Tissue Engineering and Regenerative Medicine” 1 citations
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April 2019 in “PubMed” The medulla in Asian scalp hair has a tubular structure that allows ions and large molecules to flow through it.
January 2002 in “中国人民解放军军医大学学报：英文版” 
December 2025 in “Frontiers in Nutrition” Collagen supplements may improve skin, joints, and recovery, especially with added nutrients.