March 2006 in “Chinese journal of plastic surgery” This study found that microencapsulated dermal papilla cells implanted into mice ears led to the successful regeneration of hair follicles, with APA microencapsulations of 400µm diameter allowing effective nutrient exchange.
January 2012 in “Journal of Cosmetics Dermatological Sciences and Applications” This study found that iontophoresis significantly enhances the skin penetration of magnesium salt of L-ascorbic acid 2-phosphate, especially in hairy mice, compared to passive diffusion.
7 citations
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January 2020 in “Skin Pharmacology and Physiology” In this study using ex vivo porcine ear skin, researchers found that standard nail varnish applied gently creates effective follicular closures, preventing penetration of certain substances like fluorescein sodium salt and caffeine into hair follicles, whereas solvent-free varnish and rapid application techniques were less effective.
11 citations
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January 2000 in “Journal of cosmetic science” This study found that hydrolyzed wheat proteins extensively penetrated both untreated and chemically treated hair, primarily occupying areas like the endocuticle and cortex.
119 citations
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December 2008 in “The journal of investigative dermatology/Journal of investigative dermatology” In this study, transcutaneously applied nanoparticles and viral vectors were shown to penetrate murine hair follicles, internalize in antigen-presenting cells, and induce immune responses, suggesting a promising approach for vaccine delivery.