59 citations
,
July 2015 in “Journal of innovative optical health sciences/Journal of innovation in optical health science” Nanoparticles around 600-700 nm can effectively enter and stay in hair follicles for days, which may help in delivering drugs to specific cells.
15 citations
,
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.
9 citations
,
January 2015 in “Springer eBooks” Using hair follicles can improve skin drug delivery.
29 citations
,
April 2017 in “Macromolecular bioscience” Scientists created tiny pH-sensing gels that can safely measure the pH levels inside hair follicles.
10 citations
,
July 2021 in “European journal of pharmaceutics and biopharmaceutics” Nanoparticles sized between 470 and 750 nm are best for delivering substances like caffeine into hair follicles for absorption.