8 citations
,
March 2021 in “Drug testing and analysis” Researchers improved a method to more accurately estimate when and how long a drug was taken using hair analysis.
4 citations
,
January 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” PrrH sRNA controls pyochelin gene expression in Pseudomonas aeruginosa based on heme levels.
The estrogen receptor pathway controls hair growth cycles and affects skin cell growth.
450 citations
,
January 2005 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair color is determined by melanin produced and transferred in hair follicles.
May 2024 in “BMC veterinary research” Metabolites and diet affect hair growth cycles in cashmere goats.
1 citations
,
January 2018 in “bioRxiv (Cold Spring Harbor Laboratory)” Increased PHGDH expression causes early melanin buildup in hair follicles.
August 2017 in “Journal of animal science/Journal of animal science ... and ASAS reference compendium” Melatonin supplementation may lower skin temperature in unshaved areas of pregnant beef cattle.
3 citations
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July 2003 in “PubMed” The research found a way to measure hair surface changes by analyzing how light reflects off of it, and determined hair cuticle angles vary by hair length and color.
August 2023 in “Asian journal of pharmaceutical and clinical research” Intense Pulsed Light is an effective and safe hair removal method for people with excessive hair growth.
40 citations
,
March 2017 in “The journal of investigative dermatology/Journal of investigative dermatology” Growing hair follicles have high mitochondrial activity and ROS in specific regions, aiding hair formation.
12 citations
,
November 2014 in “PLOS Computational Biology” The study concluded that hair growth in mice is regulated by a stable interaction between skin cell types, and disrupting this can cause hair loss.
29 citations
,
February 1987 in “General and comparative endocrinology” Thyroid and gonadal hormones control seasonal hair growth and molting in male European badgers.
Melatonin improves tomato root growth and plant health at certain levels by affecting genes and hormones but can damage roots at high levels.
14 citations
,
September 2017 in “Clinical and Experimental Dermatology” Systemic photodynamic therapy can effectively treat stubborn folliculitis decalvans with few side effects.
May 2022 in “Indian Journal of Animal Research” Melatonin receptor genes likely play an important role in the development of goose feather follicles.
25 citations
,
March 2014 in “Experimental Dermatology” Leptin helps start the growth phase of hair.
8 citations
,
August 2018 in “Journal of Investigative Dermatology”
2 citations
,
March 2004 in “Journal of the American Academy of Dermatology” The 60-second timed hair count is a reliable and simple way to measure hair shedding at home, showing older women tend to shed more hair than younger women.
November 2025 in “Journal of Investigative Dermatology” Light skin shows more inflammation from sun exposure than dark skin.
June 2020 in “The journal of investigative dermatology/Journal of investigative dermatology” Pulsed red light boosts collagen and energy in cells faster than continuous red light.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” Phototherapy helps some patients with alopecia areata regrow hair, especially those with hair at treatment start and less severe forms of the condition.
Melatonin affects cell growth differently based on its concentration.
January 2026 in “Nature Communications” A wearable device using NIR light may help treat hair loss non-invasively.
September 2018 in “The Medical Journal of Cairo University/The Medical Journal of Cairo University” Polarized light therapy helps hair regrowth in alopecia areata patients.
May 2012 in “International Journal of Dermatology and Venereology” Hair growth and development are controlled by complex signaling pathways.
5 citations
,
May 1957 in “Nature” May 2025 in “American Journal of Veterinary Research” Photobiomodulation did not significantly improve hair density in dogs with alopecia X.
29 citations
,
January 2014 in “Frontiers in physiology” Understanding and tracking our body's natural daily rhythms could help improve heart health.
6 citations
,
January 2021 in “Annals of Dermatology” 650 nm red light helps hair grow and prevents hair loss by affecting certain genes and biological processes.
5 citations
,
November 2020 in “EBioMedicine” Disruptions in sleep-wake cycles can cause health problems like mental, metabolic, and heart diseases, and cancer.