Et senere livstidsforsøg i mus, som fik natriumbenzoat i drikkevandet i en enkelt dosis svarende til 3,4 g benzoesyre/kg lgv/dag viste en ikke-entydig stigning i brysttumorer.
A later life-span carcinogenicity study in mice given sodium benzoate in the drinking water at a single dose equivalent to 3.4 g benzoic acid/kg bw/day showed an equivocal increase in mammary tumours.