Hair revital x merely helped albeit poorly to grow back a few little hairs This team were the first to tackle head-on the actual cause of hair loss The truth is most doctors are purely concerned with the effect the symptoms of the condition rather than the cause amazingly during clinical trials They'd found that people losing hair revital x reviews their hair all had something in common an abnormally high amount of a little-known enzyme called prostaglandin d2 or PG d2 During the study when the enzyme PG d2 was added to human follicles in a petri dish Hair growth was dramatically reduced and the researchers .