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April 2011 in “European Journal of Pharmaceutics and Biopharmaceutics” Particles around 100 nm can penetrate and stay in hair follicles without passing through healthy skin, making them safe for use in topical products and useful for targeted drug delivery.
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April 2017 in “International Journal of Nanomedicine” Ethosomes are effective for delivering drugs through the skin by penetrating deeply and targeting hair follicles.
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August 2024 in “Acta Pharmaceutica Sinica B” Microneedles can improve skin disease treatment by delivering drugs directly through the skin.
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November 2014 in “Journal of Biomedical Optics” Silver nanoparticles can penetrate porcine skin up to about 15.6 μm, possibly through hair follicles.
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