HI DEMI THIS IS BILL, THE MERCURY VAPOR READING WOULD HAVE BEEN HIGHER IF YOU HAD CHEWED ON SOMTHING. THE DENTISTS I SAW SAID THAT WHEN YOU CHEW IT GRINDS ON THE FILLING CAUSING IT TO RELEASE MORE MERCURY VAPORS. MINE WAS AT .069 AFTER CHEWING GUM AND I ONLY HAD TWO FILLINGS IN MY MOUTH. MY DENTIST SAID THAT THE US SAYS THAT .050 IS ACCEPTIBLE WHILE EUROPE SAYS THAT .010 IS AN ACCEPTIBLE LEVEL. IN EITHER CASE THE BEFORE AND AFTER CHEWING READINGS WERE HIGH IN MY CASE.