TLDR  The cream with plant substances can stimulate hair follicles.   
     
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                       1 citations
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  October 2015   in “The Pharma Innovation Journal”    The best way to make a topical treatment for hair loss is to mix Saw Palmetto extract with 48% ethanol at the end of making the lotion.  
     
           87 citations
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  March 2011   in “Australasian Journal of Dermatology”    Genetics and hormones play a role in male and female hair loss, but more research is needed to fully understand it.  
     
           2 citations
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  December 2003      Saw palmetto is an effective natural treatment for hair loss with minimal side effects.