30 citations
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March 2012 in “Journal of Analytical Toxicology” THCCOOH levels in hair decrease from root to tip and don't match well with self-reported cannabis use.
Haircare products may expose users to harmful chemicals despite regulations.
February 1989 in “PubMed” A genetic hair protein variant is more common in Japanese people and is inherited.
1 citations
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March 2020 in “Hair transplant forum international” The HairMeasure device is a cheap way to measure Hair Mass Index and find scalp areas for hair exams.
February 1990 in “PubMed” Higher DHEA-S levels in hirsute females affect hair growth phases.
4 citations
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December 2013 in “British Journal of Dermatology” ESR2 gene linked to female-pattern hair loss.
July 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” Scientists created a detailed map of gene activity in different parts of human hair follicles.
November 2024 in “Stem Cell Research & Therapy” A new method improves the isolation of hair follicle cells for better hair growth research.
12 citations
,
November 2020 in “Pharmacognosy Journal” The best method to extract quercetin from these leaves is using a specific ionic liquid with salt, which is more efficient and uses fewer solvents.
2 citations
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April 2020 in “Clinical and experimental obstetrics & gynecology” Hair levels of estradiol and progesterone are higher in premenopausal than postmenopausal women, but the difference isn't statistically significant, indicating the need for a better measurement method.
7 citations
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May 2015 in “Journal of biological chemistry/The Journal of biological chemistry” Different ligands change the shape of the TRPV3 ion channel in unique ways.
41 citations
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September 2010 in “British journal of dermatology/British journal of dermatology, Supplement” Both intense pulsed light and long-pulsed diode laser effectively reduced facial hair in women, with no significant difference in satisfaction after 6 months, but intense pulsed light was more painful.
August 2007 in “Microscopy and Microanalysis” Hair fibers break by cuticle cell slipping, shape changing, cuticle fraying, and surface cracking when stretched under specific conditions.
16 citations
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December 2016 in “ecancermedicalscience” Hair analysis may help detect breast cancer early by identifying changes in lipid content.
9 citations
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January 2014 in “Journal of analytical & bioanalytical techniques” The study did not conclude whether hair can reliably indicate kidney stones, cholelithiasis, hypertension, or diabetes.
1 citations
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March 2023 in “Anais Brasileiros de Dermatologia”
2 citations
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November 2017 in “Biotechnology Letters” Researchers found four natural compounds that can change DHT levels in prostate cancer cells.
5 citations
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June 2012 in “Journal of Cosmetic and Laser Therapy” Finasteride and intense pulsed light effectively reduce unwanted facial hair in women, but may not be cost-effective.
2 citations
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December 2024 in “Iraqi Journal of Laser” A new low-cost method can accurately detect PCOS early by measuring free testosterone levels.
5 citations
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January 1990 in “Journal of Society of Cosmetic Chemists of Japan” Permanent wave lotion can extract proteins from hair, especially when pH is higher, and repeated treatments or bleaching can damage hair.
7 citations
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July 2021 in “Molecules/Molecules online/Molecules annual” The method can measure vitamin B3 levels in human hair accurately.
61 citations
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September 2010 in “Fitoterapia” Extracts from Tridax procumbens L. have strong anti-inflammatory and antioxidant effects and block inflammation-causing enzymes.
39 citations
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November 1987 in “Clinica Chimica Acta” Human platelets change minoxidil to minoxidil sulfate, helping blood vessels widen.
24 citations
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January 2003 in “Drug Delivery” Minoxidil-containing vesicles improve hair growth.
21 citations
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February 2003 in “Farmaco” Method quickly measures finasteride concentration in capsules.
15 citations
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October 2020 in “European journal of pharmaceutics and biopharmaceutics” Caffeine penetrates skin quickly through open hair follicles, but less through closed ones, with levels becoming equal after 22 hours.
15 citations
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November 2017 in “Drug Delivery and Translational Research” Certain extracts from Curcuma aeruginosa Roxb. and germacrone can boost the skin's absorption of minoxidil, a hair growth promoter, making it more effective.
3 citations
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January 2015 in “Journal of drug assessment” Taking five small dutasteride capsules is the same as taking one larger capsule.
2 citations
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January 1994 in “Yakubutsu dōtai” Finasteride has different absorption and metabolism in male and female rats, with higher concentrations in certain organs and mostly excreted through feces.
June 2025 in “Universities Journal of Phytochemistry and Ayurvedic Heights” Eclipta alba has more wedelolactone, but Wedelia chinensis is better at fighting bacteria.