Hair can't be as strong as Rapunzel's because it's impractical to scale up due to defects.
January 2020 in “대한미용학회지” Permanent hair dye reduces sulfur content in both gray and black-brown hair.
30 citations
,
January 1994 Strain H61 may reduce some ageing symptoms like bone loss and hair loss.
42 citations
,
April 2008 in “Acta materialia” Different ethnicities and treatments affect human hair strength and structure.
14 citations
,
January 2012 in “Proteins” Electrostatic interactions mainly stabilize the binding of peptides to hair keratin.
January 2026 in “Regenerative Therapy” Low-frequency electromagnetic fields may help treat hair loss by promoting hair regrowth.
Giant axonal neuropathy changes the structure of keratin in human hair, making it stiffer and stronger.
14 citations
,
November 2019 in “Materials” Diamond nanoparticles can penetrate skin and reach hair follicles, useful for imaging applications.
January 2007 in “Chinese Journal of Pharmaceuticals” The study successfully identified the structure of finasteride.
1 citations
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March 2005 in “International Journal of Cosmetic Science” Twisting hair weakens it, but strength can be recovered at low twist levels.
3 citations
,
January 2004 in “Sen i Gakkaishi” DTDG in hair treatments reduces damage and preserves hair structure.
81 citations
,
December 2007 in “Acta materialia” AFM helped show how hair changes under tension and the effects of damage and conditioner.
January 1988 in “Nosotchu” Higher magnesium and calcium in hair are linked to better brain blood flow in older adults.
People with hair loss have more heavy metals in their hair.
13 citations
,
January 2001 in “Pediatric dermatology” A dark-haired Chinese girl had hair that looked banded under certain light but was normal under a microscope.
3 citations
,
September 2018 in “Journal of Structural Biology” Oxidized trichocyte keratin has a helical dislocation in its structure.
8 citations
,
September 1975 in “Journal of Animal Science” Moose hair can track past mineral levels, except zinc.
66 citations
,
June 2004 in “Biophysical Journal” Hard α-keratin in hair has a unique, nonordered structure, different from other fibers.
3 citations
,
December 1956 in “PubMed”
7 citations
,
August 2009 in “Applied Mathematics and Mechanics-English Edition” Hair fibers have fractal patterns with properties related to the golden mean, which may affect their functionality.
14 citations
,
May 2019 in “Chemosphere” Females have higher Dechlorane Plus in hair, while males have more in dorm dust.
40 citations
,
September 2004 in “Biomacromolecules” The Glu413Lys mutation in keratin affects hair stability, while Glu413Asp does not.
2 citations
,
April 2022 in “Biomedicines” Low-frequency electromagnetic fields may help hair growth by affecting certain growth-related molecules.
The EMG-to-force model accurately predicts hip muscle forces during walking.
Adequate vitamin D might lower, and high hair chromium might increase DNA damage in obese women.
Imbalances in metals and proteins may help understand and treat bipolar disorder and schizophrenia.
21 citations
,
September 2008 in “Magnetic Resonance Imaging” MRI can effectively image skin structures noninvasively.
6 citations
,
March 1991 in “Journal of Radioanalytical and Nuclear Chemistry” Manganese levels in hair may be linked to multiple sclerosis.
21 citations
,
October 2023 in “The Journal of Physical Chemistry C” Phosphates strongly attach to cerium dioxide nanoparticles, showing specific spectral patterns.
January 2004 in “Weiliang yuansu yu jiankang yanjiu” Copper levels differ by gender, and young children have higher mineral levels.