Body burden is the amount of a harmful
substance that is permanently present in a person's body. It is usually expressed in
mass units, such as grams and milligrams. The substance may be
radioactive or it might be chemically
toxic. Many harmful substances can be eliminated naturally by the human body, but some are removed very slowly or not at all. Water soluble molecules are usually easy to remove.
Non-polar molecules, on the other hand, are
lipophilic and tend to accumulate in
fat tissue, which is also
non-polar. Large fragments, such as
shrapnel, are also difficult for the body to remove.
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The amount of a chemical stored in the body at a given time, especially a potential toxin in the body as the result of exposure.