Therefore , the concentrations may increase five - to tenfold from age 20 to age 60 .
Since the half - lives are very long ( for e.g. TCDD 7 -- 8 years ) , the body burden will increase almost over the whole lifetime .
The concentrations may increase five - to tenfold from age 20 to age 60 .
Since the half - lives are very long ( for e.g. TCDD 7 -- 8 years ) , the body burden will increase almost over the whole lifetime .