Calcium-disodium EDTA and DMSA are only approved for the removal of lead by the Food and Drug Administration while DMPS and TTFD are not approved by the FDA. These drugs bind to heavy metals in the body and prevent them from binding to other agents.
The kilogram is the SI unit of mass and it the almost universally used standard mass unit. The associated SI unit of force and weight is the Newton, with 1 kilogram weighing 9.8 Newtons under standard conditions on the Earth's surface.
Metric Measurement - Weight. When you are done, try the Metric Weight Quiz. The metric measure units of weight are based on the gram. The milligram (mg) is the smallest metric measure of weight and equals 1/1000 of a gram. The centigram (cg) is the next largest unit of weight and equals 1/100 of a gram. The decigram (dg) is the next largest unit of weight and equals 1/10 of a gram.