Slimgen Keto The researchers report that the wax and wane of estrogen and progesterone throughout our menstrual cycles forces the liver to work overtime to filter the hormones and bring them into balance. Over the course of a lifetime, this takes a toll on the liver — by age 40, 90 percent of us are dealing with some degree of liver burnout. http://www.eatasialondon.com/diet/slimgen-keto/