January 2016 in “대한피부과학회지” A 0.5 mm microneedle depth is more effective for increasing hair density in treating hair loss.
18 citations
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February 2001 in “Journal of International Medical Research” Hairgain® significantly increased hair growth and was well-tolerated by individuals with hair loss.
1 citations
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July 2023 in “Plastic and Aesthetic Nursing” Biotin and collagen may improve hair health.
61 citations
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April 2012 in “British Journal of Dermatology” Caucasian women's hair appears thickest in their 20s, with perceived thinning after mid-30s due to both decreasing density and diameter.
3 citations
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October 2021 in “Clinica Chimica Acta” Hormone levels in hair vary across the head, with the highest concentration of a key hormone linked to hair loss at the top.
April 2026 in “Zenodo (CERN European Organization for Nuclear Research)” Fermented rice water in hair serum can improve hair growth and scalp health.
Platelet-rich plasma helps human hair cells grow and survive better.
September 2022 in “International Journal of Trichology” Trichoscopic measurements help determine the severity of female pattern hair loss.
December 2018 in “Вестник Российской Военно-медицинской академии” PRP therapy significantly improves hair growth and density in men with androgenic alopecia.
89 citations
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December 1998 in “The Journal of Steroid Biochemistry and Molecular Biology” Human hair can be used to measure reproductive hormones.