A<unk>  <unk>  may be determined for those carcinogens not assumed to have a threshold.<unk> s are calculated by regulatory agencies to represent the level of exposure to such carcinogenic agents at which an excess of cancers greater than that level accepted by society is not expected.
Virtually safe dose
Chronic toxicity
Broad-spectrum therapeutic
Tolerable weekly intake
Late effect
The dose makes the poison
Tissue selectivity
Hypoallergenic