122 citations
,
March 2013 in “Expert opinion on drug delivery” This review summarizes drug delivery strategies to hair follicles, highlighting physicochemical factors affecting penetration and the use of stimuli-responsive particulate carriers, but reports no new clinical findings.
263 citations
,
February 2011 in “Journal of Controlled Release” This study found that medium-sized particles (643 and 646 nm) penetrated deeper into porcine hair follicles in vitro than smaller or larger particles, suggesting size-selective targeting within follicular sites.
82 citations
,
May 2009 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology” The study reported that combining the Follicular Closing Technique with the Franz diffusion cell is a valuable method for investigating follicular caffeine penetration in vitro, though kinetics differ from in vivo results.
211 citations
,
February 2009 in “European journal of pharmaceutics and biopharmaceutics” This review summarizes recent advancements in follicular targeting for drug delivery via hair follicles and calls for pilot studies in humans to explore potential clinical applications.
182 citations
,
December 2007 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology” This study demonstrated that hair follicles significantly expedite the absorption of caffeine through the skin compared to interfollicular pathways.
316 citations
,
June 2004 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that using a standardized protocol with microspheres of approximately 1.5 micrometers enhances penetration into hair follicles, particularly when skin is treated with cyanoacrylate skin surface stripping.