Only if it bioaccumulates faster than the half-life of the isotope reduces its presence. Strontium-90, e.g. has a half life of 28.5 years and a biological half

Only if it bioaccumulates faster than the half-life of the isotope reduces its presence. Strontium-90, e.g. has a half life of 28.5 years and a biological half life of 30 years http://hpschapters.org/northcarolina/NSDS/strontium.pdf http://hpschapters.org/northcarolina/NSDS/strontium.pdf