fyi: mcg/dL in this test is the micrograms of lead per deci-Liter of blood. One microgram = 1/1000000 grams = 0.0000000022 pounds, 1 dL = 1/10 liter. No doctor tests for lead, all the tests are done by a laboratory. USA labs usually quote mcg/dL because the OSHA regulations are written in these terms. Foreign labs often use microMols per liter because they write their regulations using those units.