73 citations
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October 1986 in “Journal of the American Academy of Dermatology” This study found that a combination of topical tretinoin and 0.5% minoxidil resulted in terminal hair regrowth in 66% of subjects with androgenetic alopecia over one year.
43 citations
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January 2007 in “American Journal of Clinical Dermatology” This study concluded that a combined once-daily solution of 5% minoxidil and 0.01% tretinoin is as effective and safe as the conventional twice-daily 5% minoxidil application for treating androgenetic alopecia in men.
41 citations
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January 2007 in “Journal of Korean Medical Science” This study found that combining minoxidil with all-trans retinoic acid additively promoted hair growth in vitro by activating certain cell survival pathways and reducing apoptosis markers more effectively than minoxidil alone.
36 citations
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March 1989 in “British journal of dermatology/British journal of dermatology, Supplement” In this study, the authors compared topical diphencyprone and tretinoin gel for treating alopecia totalis and universalis, but the abstract does not report any definitive clinical results.
30 citations
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April 1990 in “Clinical Pharmacology & Therapeutics” This study found that coadministering minoxidil with tretinoin cream increased minoxidil absorption nearly threefold in healthy males, attributed to increased stratum corneum permeability.