Dr. Howard Smith Oncall

  Vidcast:  https://youtu.be/b-pkrxQmsPY   Can’t believe how fast your hair is greying during the CoVid crisis?  It isn’t the cheap hair dye your stylist uses to keep you coming back often.   Turns out that relentless stress grays your hair at record speeds.  Just ask Marie Antoinette. Legend has it that her locks whitened overnight before her trip to the guillotine.   Extreme stress ramps up the sympathetic nervous system for a danger response.  The neurotransmitter norepinephrine gushes from nerve endings throughout the body including around our hair follicles.  The excess nor-ep recruits stem cells that ordinarily would become pigment producing factories.  They don’t, no pigment, no hair color.   https://www.ncbi.nlm.nih.gov/pubmed/31969699   #stress #coronavirus #grayhair #norepinephrine