I STARTED TAKING FO-TI 17-18 YRS AGO AND ONLY STOPPED ONCE FOR 3 MTHS THEN STARTE AGAIN,. THRU CANADIAN DR TESTS - I HAVE THE BEST EVER SEEN GOOD AND BAD COLESTRAL - BONE DENSITY TESTS ABOVE AVERAGE AND 60+ WITH VERY LITTLE GRAY HAIR. SCARED TO STOP TAKING.