May 2026 in “Bioactive Materials” This study reported that in degenerative alopecia, Zn²⁺/Cu²⁺-dependent proteases are downregulated and destabilized, and a specially developed microneedle patch reactivated these enzymes, reduced senescence, and enhanced hair regeneration in an animal model.
2 citations
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February 2023 in “International Journal of Cosmetic Science” In this study, evidence suggested that hair loss occurs more frequently in multi-hair follicular units on the scalp, particularly in men.
75 citations
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March 2014 in “Journal of Investigative Dermatology” This study found that aging mice experience slower and more fragmented hair cycle waves, but transplanting aged skin to a young host can partially restore hair cycling, implicating extracellular factors.
8 citations
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November 2020 in “Journal of Cosmetic Dermatology” This preclinical study observed that a nanoencapsulated ingredient complex, AcPi, may prevent hair follicle aging and hair loss by reducing oxidative stress, enhancing mitochondrial activity and WNT/β-catenin signaling, and controlling androgenic metabolism when tested on human scalp cultures.
12 citations
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December 2021 in “Aging” This study demonstrated that a new non-invasive method for collecting and analyzing mouse hair follicles could replace traditional biopsy methods, providing advantages for translational research and routine applications.