January 2021 in “Journal of cosmetology & trichology” This study suggests that L-(+)-Tartaric Acid may support hair growth by up-regulating certain genes in human Dermal Papilla cells, making it a potentially useful additive in minoxidil formulations.
26 citations
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October 2007 in “Experimental Dermatology” This study found that l-carnitine stimulated hair growth in vitro by promoting proliferation and reducing apoptosis in human scalp hair follicles, suggesting potential as a treatment for hair loss.
January 2013 in “Journal of Chengdu Medical College” In this study, Tolterodine Tartrate significantly improved symptoms of overactive bladder and showed fewer adverse reactions compared to the control group treatment.
13 citations
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September 2007 in “Journal of dermatological science” 
September 2020 in “Hair transplant forum international” This article memorializes Dr. O'Tar T. Norwood and highlights his contributions to the field of hair restoration surgery; it does not report new research findings.