31 citations
,
September 2016 in “PLoS ONE” Cell division orientation varies by body site and is linked to epidermal thickness and cell density.
January 2004 in “中国组织化学与细胞化学杂志” December 2019 in “C&EN Global Enterprise” Thicker hair isn't always stronger.
April 2018 in “The journal of investigative dermatology/Journal of investigative dermatology” Electrical epilation damages hair follicles and surrounding skin, likely preventing hair regrowth.
5 citations
,
April 2024 in “bioRxiv (Cold Spring Harbor Laboratory)” Aging skin shows thinner layers, fewer hair follicles, and new biomarkers like increased space between cells and smaller sebaceous glands.
96 citations
,
April 2017 in “Oncotarget” Smaller nanoemulsions can penetrate skin and hair follicles better, which may be useful for delivering drugs and vaccines through the skin.
79 citations
,
November 2010 in “Journal of Neuroscience” Hair clipping can trigger axon growth and changes in the skin.
37 citations
,
January 2022 in “Frontiers in Genetics” Aging reduces dermal sheath cells, affecting youthful skin appearance.
December 2025 in “Russian Journal of Skin and Venereal Diseases” Hair follicles are thinner in alopecia patients, especially in alopecia areata.
17 citations
,
January 2011 in “Skin Research and Technology” Hair from people with seborrheic dermatitis is thicker scaled, more damaged, and thinner than healthy hair, and atomic force microscopy can help monitor the condition.
May 2022 in “Experimental dermatology” Trichothiodystrophy hair is structurally abnormal with protein and organization issues.
8 citations
,
February 1968 in “Australian Journal of Zoology” The southern elephant seal's skin layer helps waterproof the skin by being tightly connected to hair shafts.
7 citations
,
September 2019 in “Journal of Investigative Dermatology”
4 citations
,
November 2004 in “Clinical and Experimental Dermatology” Hair length and thickness are related, with thickness peaking at about a quarter of the hair's maximum length.
1 citations
,
February 2021 in “bioRxiv (Cold Spring Harbor Laboratory)” A300 membranes help skin heal faster by promoting cell growth and repair.
44 citations
,
October 1990 in “Archives of Dermatological Research” The connective tissue around hair follicles changes structure throughout the hair cycle.
23 citations
,
February 2004 in “British Journal of Dermatology” Keratin in mouse hair follicles is complex and plays specific roles.
36 citations
,
January 1994 in “Cell and Tissue Research”
15 citations
,
July 2004 in “Journal of morphology” Monotreme hair structure and protein distribution are similar to other mammals, but their inner root sheath cornifies differently, suggesting a unique evolution from reptile skin.
March 2020 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” The dermal sheath's contraction is crucial for hair follicle regression and stem cell relocation.
46 citations
,
April 2009 in “Journal of Dermatological Case Reports” Researchers established normal hair and scalp characteristics for healthy women using trichoscopy.
January 2007 in “The FASEB journal” Human hair keratins help nerve regeneration and support Schwann cell activity.
2 citations
,
April 2023 in “Archives of Aesthetic Plastic Surgery” The phototrichogram is better for measuring hair thickness.
October 2019 in “Skin appendage disorders” The vitreous membrane in hair follicles changes shape during the hair cycle and may affect hair growth and nutrient exchange.
April 2009 in “The FASEB Journal” Keratin biomaterials from human hair help nerve regeneration by activating Schwann cells.
5 citations
,
September 2009 in “Acta Ophthalmologica” Hyper-keratinisation in Meibomian glands contributes to gland dysfunction.
22 citations
,
February 2008 in “Journal of Dermatological Science” EPR spectroscopy showed that spontaneous hair growth results in thicker skin and less pigmented hair than depilation-induced growth.
10 citations
,
May 2016 in “bioRxiv (Cold Spring Harbor Laboratory)” Lipid metabolism affects wool thickness in sheep.
2 citations
,
August 2019 in “International Journal of Cosmetic Science” Older age and certain lifestyles are linked to thinner, weaker hair, while how you see your hair relates to its thickness.
61 citations
,
April 2023 in “Advanced Materials” The new electrode improves long-term monitoring on hairy skin by reducing motion issues and is easy to use.