108 citations
,
November 1980 in “British Journal of Dermatology” Oral retinoids are effective for various skin conditions but have side effects and should not be used during pregnancy.
13 citations
,
December 2017 in “The journal of investigative dermatology/Journal of investigative dermatology” Nicotinamide applied to the scalp can slow down hair growth.
9 citations
,
July 2020 in “Experimental Dermatology” Topical L-thyroxine may help with wound healing and hair growth but should be used short-term due to potential risks.
211 citations
,
February 2009 in “European journal of pharmaceutics and biopharmaceutics” Hair follicles help absorb and store topical compounds, aiding targeted drug delivery.
20 citations
,
August 2014 in “Therapeutic delivery” The transfollicular route shows promise for noninvasive, targeted drug delivery but needs more research.